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[Q] Help phone is not turning on red flashes

Hi my sony xperia E c1505 is not turning on it flashes red when hold power button it is not dead of battery fully charged left over night I unlocked the bootloader then i tried flashing it it says please turn on your phone and enable USB-debugging mode my phone can not turn on cause im in the bootloader after that I did somthing else but now i press power button just flashes red lights i am able to get in to flash mode and fastboot however i try flashing it but its says please enable USB-debugging is there a way to fix this and by the way im using flash tool and i have tried to update it with sony xperia update tool.

callum123457 said:
Hi my sony xperia E c1505 is not turning on it flashes red when hold power button it is not dead of battery fully charged left over night I unlocked the bootloader then i tried flashing it it says please turn on your phone and enable USB-debugging mode my phone can not turn on cause im in the bootloader after that I did somthing else but now i press power button just flashes red lights i am able to get in to flash mode and fastboot however i try flashing it but its says please enable USB-debugging is there a way to fix this and by the way im using flash tool and i have tried to update it with sony xperia update tool.
Click to expand...
Click to collapse
when you connect your phone in flashmode green light should stay on (press & hold vol down then plug usb in)
it should show
"device connected in flashmode"
IF you want fastboot mode
when you connect your phone in fastboot mode blue light should stay on (press & hold vol up then plug usb in)
NOTE-it should actually do bootloops....not sure why red light

callum123457 said:
Hi my sony xperia E c1505 is not turning on it flashes red when hold power button it is not dead of battery fully charged left over night I unlocked the bootloader then i tried flashing it it says please turn on your phone and enable USB-debugging mode my phone can not turn on cause im in the bootloader after that I did somthing else but now i press power button just flashes red lights i am able to get in to flash mode and fastboot however i try flashing it but its says please enable USB-debugging is there a way to fix this and by the way im using flash tool and i have tried to update it with sony xperia update tool.
Click to expand...
Click to collapse
Sometimes flash tool, while flashing tells me to turn on usb debugging (although its already on). So what do I do? Wait. After ten minutes(approx), device disconnects automatically and then flashtool requests me to connect in flash mode. So I disconect my usb cable and connect it again in flash mode and voila! flash begins. Worked for me, hope it works for u too..
Sent from my Xperia E dual using XDA Premium 4 mobile app

sohailferdous said:
Sometimes flash tool, while flashing tells me to turn on usb debugging (although its already on). So what do I do? Wait. After ten minutes(approx), device disconnects automatically and then flashtool requests me to connect in flash mode. So I disconect my usb cable and connect it again in flash mode and voila! flash begins. Worked for me, hope it works for u too..
Sent from my Xperia E dual using XDA Premium 4 mobile app
Click to expand...
Click to collapse
yes thats a common mistake
on flashmode connect phone in flashmode only when asked (or like you said ...you will have to do twice)
on fastboot mode your phone has to be connected in fastboot before selecting the fastboot mode

I'm having very similar trouble, i flashed FXP CM10 a little while ago until the phone stopped receiving a signal (which has happened a few times using CM10), unfortunately the battery died before i got home to flash it again. 3 days and 7 hours later and the battery still hasn't charged, i've managed to boot into android very quickly while it's connected to a wall charger but i get nothing at all if i try and connect in flashmode or fastboot.
Is the battery dead? Is there something i'm probably missing? I figured this might go to someway with hoping the OP.
[Edit: Good news! I've plugged into USB and i can get to the battery bar with the power symbol, maybe i can get to flashmode after all!]
[Edit 2:] Noticing the phone had just enough power to get to the battery/power symbol screen, held down the volume button for about a minute till it went through that cycle and managed to get it into flashmode, installed stock and plugged it into the wall. 5 mins later i hit the power button and it's working again! Hooray!

GeoH85 said:
I'm having very similar trouble, i flashed FXP CM10 a little while ago until the phone stopped receiving a signal (which has happened a few times using CM10), unfortunately the battery died before i got home to flash it again. 3 days and 7 hours later and the battery still hasn't charged, i've managed to boot into android very quickly while it's connected to a wall charger but i get nothing at all if i try and connect in flashmode or fastboot.
Is the battery dead? Is there something i'm probably missing? I figured this might go to someway with hoping the OP.
[Edit: Good news! I've plugged into USB and i can get to the battery bar with the power symbol, maybe i can get to flashmode after all!]
[Edit 2:] Noticing the phone had just enough power to get to the battery/power symbol screen, held down the volume button for about a minute till it went through that cycle and managed to get it into flashmode, installed stock and plugged it into the wall. 5 mins later i hit the power button and it's working again! Hooray!
Click to expand...
Click to collapse
use jim34 cm10 with hsr0 kernel....FXP IS CRAP for daily use

don't connect your phone to the pc until flashtool asks you to. I get that thing sometimes when I reflash a rom or kernel
Sent from my ST21i using Tapatalk

[Q] I brick my nexus, need help

Hello everyone.
Yesterday I tried to flash my nexus to f2fs. After that I wanted to go back to the stock, but forgot format filesystem to ext4 and run flash_all.bat.
Flashing was stopped on system write with error: "Unknown chunk type". After that i can't open recovery or turn on phone.
On 4pda i read, that bootloader reopen can help fix this problem.
When I flash new boot, nexus was died.
Can you help me?

Hi,
Please provide a link to exactly what you've flashed? Can you access the bootloader?

i flash google original rom
no, i haven't access to bootloader

no-tactic said:
i flash google original rom
no, i haven't access to bootloader
Click to expand...
Click to collapse
you need to put your device in fastboot mode, keep retrying
then to go back to EXT4 :
- Flash back an official custom recovery (CWM or TWRP)
- Format Data from recovery
- Flash a kernel compatible with your ROM
- Reboot.

no-tactic said:
i flash google original rom
no, i haven't access to bootloader
Click to expand...
Click to collapse
What happens when you hold down Power + Vol down keys together? Hold them until you feel a vibration. May be the battery has died? Keep it on charge for an hour and then try to enter bootloader?

vin4yak said:
What happens when you hold down Power + Vol down keys together? Hold them until you feel a vibration. May be the battery has died? Keep it on charge for an hour and then try to enter bootloader?
Click to expand...
Click to collapse
nothing happens. When I put the phone on charge, it starts to warm up a bit in the camera, but even the display does not light up.
when i connect the phone to computer, it is defined as qhsusb_bulk or unknown usb device

no-tactic said:
nothing happens. When I put the phone on charge, it starts to warm up a bit in the camera, but even the display does not light up.
when i connect the phone to computer, it is defined as qhsusb_bulk or unknown usb device
Click to expand...
Click to collapse
Your memory is no longer accessible unfortunately, you most likely need to have it repaired (new motherboard) :crying:

no-tactic said:
nothing happens. When I put the phone on charge, it starts to warm up a bit in the camera, but even the display does not light up.
when i connect the phone to computer, it is defined as qhsusb_bulk or unknown usb device
Click to expand...
Click to collapse
If all the key combinations don't work, them your device is done for! Since it's totally dead there shouldn't be any problem to RMA it! Good Luck

no-tactic said:
nothing happens. When I put the phone on charge, it starts to warm up a bit in the camera, but even the display does not light up.
when i connect the phone to computer, it is defined as qhsusb_bulk or unknown usb device
Click to expand...
Click to collapse
Press and hold volume up while you connect usb cable to pc.
can you see download mode on device screen?
if yes read this thread entirely http://forum.xda-developers.com/showthread.php?t=2515760
Edit: try this also:
connect your phone to the pc, open device manager.
hold your power button until QHSUSB_BULK disappears, then in that split second press and hold both volume key while you still press the power key. it may end up into the second bootloader

thank you all!

Problems with my d6633 Z3 Dual

Hallo people,
I have a very big problem with my d6633. I installed tonight TWRP - so fas, so good. After installing TWRP asked me to root the device, I said YES. My bootloader was unlocked. Then I couldn't exit TWRP. After every reboot the device started into TWRP. Now I can not start the device. I tried with Power+ Volume+, reset button - nothing.
Any suggestions?
Thanks for your help.

mazagi said:
Hallo people,
I have a very big problem with my d6633. I installed tonight TWRP - so fas, so good. After installing TWRP asked me to root the device, I said YES. My bootloader was unlocked. Then I couldn't exit TWRP. After every reboot the device started into TWRP. Now I can not start the device. I tried with Power+ Volume+, reset button - nothing.
Any suggestions?
Thanks for your help.
Click to expand...
Click to collapse
Use flashtool go back stock, after flash twrp, flash supersu manually, don't let twrp install for you

yuzhengwen said:
Use flashtool go back stock, after flash twrp, flash supersu manually, don't let twrp install for you
Click to expand...
Click to collapse
How can I do that? There is no power on my device. And I think I cannot charge it...

mazagi said:
How can I do that? There is no power on my device. And I think I cannot charge it...
Click to expand...
Click to collapse
Google using flashtool to flash stock firmware

yuzhengwen said:
Google using flashtool to flash stock firmware
Click to expand...
Click to collapse
No chance. The device will not be detected. I can not charge it.

mazagi said:
No chance. The device will not be detected. I can not charge it.
Click to expand...
Click to collapse
How much % did it have before you started the procedure?
Did you try holding down vol+ and then plugging it into USB?

Hello Jkay7,
Thanks for your support. My solution was to leave the device switched off over the night. Connected via original cable. Today in the morning my dyouzhengwen evice was detected via flash tool and as youzhengwen suggested I could flash the original ftf file.

artusk01 said:
Hello Jkay7,
Thanks for your support. My solution was to leave the device switched off over the night. Connected via original cable. Today in the morning my dyouzhengwen evice was detected via flash tool and as youzhengwen suggested I could flash the original ftf file.
Click to expand...
Click to collapse
Nice to hear that!

Any help would be appreciated
Sony Xperia Z3 Dual D6633
I have tried just about every method seen. My problem with the flashtool or PC companion is that the phone is recognized by the computer but I can only start to turn the device on which I don't believe it actually boots. Broken display and new display does not power on.
Or it connects in fastboot by holding volume up when connecting. This shows a blue led.
But trying to connect in flash mode by holding power down just makes the led flash red then green continuously.
And for the pc companion it always says the connection was unsuccessful once the led turns green on the device.
I got the phone for only $40 in this condition. So I cannot say what entirely was wrong or what it's last working state was.
I bought a new screen and power flex cable. As well as a back plate and tempered glass protectors. I was going to wait until everything works perfect speakers and all before I sealed it tight with water proof adhesive stickers.
Even before I bought the new power flex the computer recognized it and the battery health and charge %. The battery was able to charge. But I couldn't turn the device on.
The computer confirmed that it had been at 29% after some time charging and then 100% after leaving it on charge.
Now with the new screen and power cable the phone still does nothing if not plugged it. The light was red at first, but then yellow, then after some time green when the battery fully charged. This was again even before the new parts.
I have to plug it in to try anything.
It goes red then starts to turn on and turns green.
But I hear no sound, get no vibrations, the computer only sees it as the phone and shows absolutely nothing on the removable disk. Just blank when I click on the drive volume. But it is seen as an Xperia D6633 phone or fastboot Android device.
I've tried the reset button, holding power and volume up, volume down, all three. Tried my factory cable. Different cables, different ports, uninstalling it from service manager and letting the flash tool recognize and install it.
I also tried the new display on the old power flex and the old display on the new power flex.
Nothing changed, no vibrations, no sounds, system never actually fully starts as far as I can tell, and cannot connect in flash mode only fast boot. And the flashable file is only seen in flash mode. Fastboot can only see the folder but it is ready to flash files as far as I can tell.

@xdathekilljoy
That's a lot of money you're putting into an (apparently) broken phone Brave!
Okay so what happens if you hold Vol+ while it's shut down and then connect it to USB, the LED turns blue, right?
So why does flashing it from there on not work?

Jkay7 said:
@xdathekilljoy
That's a lot of money you're putting into an (apparently) broken phone Brave!
Okay so what happens if you hold Vol+ while it's shut down and then connect it to USB, the LED turns blue, right?
So why does flashing it from there on not work?
Click to expand...
Click to collapse
Well it didn't seem that broken at first and both it and the display were only about 37 piece. Power flex was almost 10. Seemed like a rightful price.
Yes the led turns blue and it is in fastboot mode. The flash file seems to only be readable for flashing in flash mode "volume down". I can see the folder of the flash file in fastboot mode " volume up ", but not in a flashable format.
And when connecting " volume down " it fails a connection while the led just flashes green to red to green to red continually

Two updates
1. I thought I should mention that when I do plug the phone in to a charger or computer the top does get a bit warm or hot as well as the led turns on. Different color depending.
2. With much fiddling and trying if holding the volume down button for different lengths of time while connecting up a computer I finally got it to connect in flash mode and flashed a file...... No change.
At this point maybe I should try a new battery for the hell of it even though this one seems to be working.
Or there is a minute hardware damage somewhere. Maybe the power ic? Or s capacitor?

Hard Bricked T-Mobile Z3, Doesn't turn on at all

I have T-Mobile Z3 (D6616) that I rooted and flashed TWRP on with no issues. Today I tried to flash ZyxxOS on it. after wiping and installing I went to reboot. The phone only powered off and then no matter what I do will not power on. I've tried all the button combos, LED's don't flash, I used the little yellow button by the sim, nothing.
If there is anything I can add let me know and I'll try to help to the best of my abilities.
thanks, Nathan
EDIT: If anyone can help me to the point that the phone boots or is completely fixed, I'll buy you a 6 pack of beer (or soda if you're too young to drink)
EDIT2: I let the phone charge all night and now (still plugged in) the notification LED is glowing red

Try to boot into Fastboot mode by holding the volume up then plug in the usb into your phone, if it detects then use the sony tool to reflash your firmware and it should work. If fastboot doesnt detect then I don't know what else to say.

serophia said:
Try to boot into Fastboot mode by holding the volume up then plug in the usb into your phone, if it detects then use the sony tool to reflash your firmware and it should work. If fastboot doesnt detect then I don't know what else to say.
Click to expand...
Click to collapse
Yeah it doesn't respond to anything. I've tried loading into fastboot, even holding all the button combos for a whole minute.

nathanmcneil said:
Yeah it doesn't respond to anything. I've tried loading into fastboot, even holding all the button combos for a whole minute.
Click to expand...
Click to collapse
Read these two threads and try it out. It may or may not work but its worth a shot.
http://forum.xda-developers.com/showthread.php?t=1849170
http://forum.xda-developers.com/showpost.php?p=37844592&postcount=317

nathanmcneil said:
I have T-Mobile Z3 (D6616) that I rooted and flashed TWRP on with no issues. Today I tried to flash ZyxxOS on it. after wiping and installing I went to reboot. The phone only powered off and then no matter what I do will not power on. I've tried all the button combos, LED's don't flash, I used the little yellow button by the sim, nothing.
If there is anything I can add let me know and I'll try to help to the best of my abilities.
thanks, Nathan
EDIT: If anyone can help me to the point that the phone boots or is completely fixed, I'll buy you a 6 pack of beer (or soda if you're too young to drink)
EDIT2: I let the phone charge all night and now (still plugged in) the notification LED is glowing red
Click to expand...
Click to collapse
How long did you hold the reset button for? I had the same issue with a z2 tablet and I had to hold the button for at least 2 minutes.

Yes nathan,try to do this what @BladeRunner says:hold buttons for mor time.
Do you tried flash phone with flashtool?
Послато са SM-G901F уз помоћ Тапатока

Allek84 said:
Yes nathan,try to do this what @BladeRunner says:hold buttons for mor time.
Do you tried flash phone with flashtool?
Послато са SM-G901F уз помоћ Тапатока
Click to expand...
Click to collapse
So I left the phone on the (wall) charger all night and when I woke up the notification light was red. I hit volume down +power and the phone vibrated 3 times but nothing else happened. After that I tried connecting it to flash tool with a rubberband on the volume up botton. Flashtool's notification screen thing kept repeating "phone connected adb disabled" and then "device disconnected". I let it do that for about an hour before I took it off and put it back on the charger.
Should I still try and reset it by holding it for a few minutes? I read the softbrick thread linked above but i'm not sure what I should do or where my situation fits into that thread.
thanks, Nathan

nathanmcneil said:
So I left the phone on the (wall) charger all night and when I woke up the notification light was red. I hit volume down +power and the phone vibrated 3 times but nothing else happened. After that I tried connecting it to flash tool with a rubberband on the volume up botton. Flashtool's notification screen thing kept repeating "phone connected adb disabled" and then "device disconnected". I let it do that for about an hour before I took it off and put it back on the charger.
Should I still try and reset it by holding it for a few minutes? I read the softbrick thread linked above but i'm not sure what I should do or where my situation fits into that thread.
thanks, Nathan
Click to expand...
Click to collapse
wwouldn't you connect it to the flash tool with volume button down? That might at least get it into flashmode.

BladeRunner said:
wwouldn't you connect it to the flash tool with volume button down? That might at least get it into flashmode.
Click to expand...
Click to collapse
I tried that, leaving it with flashtool waiting to connect and my phone connected with a rubberband on the volume down overnight last night. Nothing happened and now flashtool didn't even recognize the phone.

nathanmcneil said:
I tried that, leaving it with flashtool waiting to connect and my phone connected with a rubberband on the volume down overnight last night. Nothing happened and now flashtool didn't even recognize the phone.
Click to expand...
Click to collapse
Try this, open up flashtool and select your firmware, then click on the flash icon, after you clicked flash hold the volume down while connecting the usb cable and see if it the led changes from red to green/blue. Also what version of flashtool are you using? Maybe thats why its not detecting via the rubberband method. Also give this a go as well:
Recovery Mode:
Turn off the device
Press and hold Volume UP + Volume Down Key
then Press and hold Power key while pressing these keys
then press Camera key to enter Android System Recovery
Release all key when you see Android icon

serophia said:
Try this, open up flashtool and select your firmware, then click on the flash icon, after you clicked flash hold the volume down while connecting the usb cable and see if it the led changes from red to green/blue. Also what version of flashtool are you using? Maybe thats why its not detecting via the rubberband method. Also give this a go as well:
Recovery Mode:
Turn off the device
Press and hold Volume UP + Volume Down Key
then Press and hold Power key while pressing these keys
then press Camera key to enter Android System Recovery
Release all key when you see Android icon
Click to expand...
Click to collapse
im using version 0.9.19.8 but I am updating to 0.9.19.10 right now to see if that changes anything. Also how do I know if it's off? the phone doesn't do anything when i hit the power button.

nathanmcneil said:
im using version 0.9.19.8 but I am updating to 0.9.19.10 right now to see if that changes anything. Also how do I know if it's off? the phone doesn't do anything when i hit the power button.
Click to expand...
Click to collapse
If you plug in your charging cable and a red led is on that means it is powered off. So just try the button combination I have mentioned and hope it boots into stock recovery to try a factory reset.

serophia said:
If you plug in your charging cable and a red led is on that means it is powered off. So just try the button combination I have mentioned and hope it boots into stock recovery to try a factory reset.
Click to expand...
Click to collapse
I did the rubber band trick with the new flashtool, and the flashtool log just says,
device connected with USB debugging disabled
for 2011 devices line, make sure you are not in MTP mode
device disconnected
I get this over and over and it has been like this pretty much all day.
*EDIT: i held down power and volume down for a really long time this time and the led blinks red 3 times while I hold the buttons down.*

nathanmcneil said:
I did the rubber band trick with the new flashtool, and the flashtool log just says,
device connected with USB debugging disabled
for 2011 devices line, make sure you are not in MTP mode
device disconnected
I get this over and over and it has been like this pretty much all day.
Click to expand...
Click to collapse
Darn, not much you can do since USB Debugging is disabled. Also is PC companion running the same time as Flashtool? That can conflict with it. If they are both running make sure to close PC companion and give it another go. Three red blinks means the battery is drained completely, but you said you charged it overnight. hmmmmm.....
EDIT: Leave it charging using original cable + wall charger for 10-30 minutes, after that unplug from wall charger with cable still intact then hold volume up and plug to PC and hope you see the Flashmode LED.

serophia said:
Darn, not much you can do since USB Debugging is disabled. Also is PC companion running the same time as Flashtool? That can conflict with it. If they are both running make sure to close PC companion and give it another go. Three red blinks means the battery is drained completely, but you said you charged it overnight. hmmmmm.....
EDIT: Leave it charging using original cable + wall charger for 10-30 minutes, after that unplug from wall charger with cable still intact then hold volume up and plug to PC and hope you see the Flashmode LED.
Click to expand...
Click to collapse
So I tried that and just got the same thing as before, with the "device connected with USB Debugging disabled." is there anything we can do to try and re-enable usb debugging in the phones current state?

nathanmcneil said:
So I tried that and just got the same thing as before, with the "device connected with USB Debugging disabled." is there anything we can do to try and re-enable usb debugging in the phones current state?
Click to expand...
Click to collapse
http://forum.xda-developers.com/z3/help/sony-xperia-z3-hard-bricked-t3026373
Try these methods, if still no luck your last option is to send it in for repair

Xperia xz does not enter flashmode help :(

Hello, this is my first publication...
A few days ago I made the update of my terminal, from version 6.0.1 and I can not flash version 7 from flashtool, everything worked fine, after flashing the computer was up to version 7.1.1, after a few days observe Which at the time of downloading and connecting the computer started with constant restarts or bootloops, until you can turn it on, also the computer occasionally has problems with the speaker, plus flash failure does not turn on ...
All this happened after flashing it
I can not enter the flash mode, pressing the volume button -, the phone turns on the green light and turns off and on again and is not detected by the computer, I would greatly appreciate the help!
Please

- do a hard power off: VOL+ and Off
- do a factory reset
- plug the USB cable to another port
- reinstall USB drivers
- try another cable
- try another PC

DHGE said:
- do a hard power off: VOL+ and Off
- do a factory reset
- plug the USB cable to another port
- reinstall USB drivers
- try another cable
- try another PC
Click to expand...
Click to collapse
Thank you for responding to my post.
- from the hard power off: VOL + and Off
I do it several times, and still nothing
- from the factory reset
It is restored by the sony configuration and neither does the equipment works normal except for the LED flash of the camera, and sometimes the problem of the mentioned speakers
In addition to proving in 3 different computers, with two different cables in addition, installing the drivers and everything, I do not know what else to do, when I connect the phone with fastboot is recognized, or through trasnferencia, there is no problem with that, only the flashmode .

I have the same problem with my XZ but found a workaround. When prompted to turn of your phone and plug it in flash mode reboot the phone instead. When the screen goes black hold the volume down, when the phone turns back on it will go into flash mode. Works for me every time.
Sent from my F8331 using XDA-Developers Legacy app

dachao said:
I have the same problem with my XZ but found a workaround. When prompted to turn of your phone and plug it in flash mode reboot the phone instead. When the screen goes black hold the volume down, when the phone turns back on it will go into flash mode. Works for me every time.
Sent from my F8331 using
Hello, Thanks for replying, try the mentioned method and still flashes the green LED when connecting it in flash mode ...
According to what you said should you restart the phone connected to the usb cable?
Click to expand...
Click to collapse

eduardoamm said:
dachao said:
I have the same problem with my XZ but found a workaround. When prompted to turn of your phone and plug it in flash mode reboot the phone instead. When the screen goes black hold the volume down, when the phone turns back on it will go into flash mode. Works for me every time.
Sent from my F8331 using
Hello, Thanks for replying, try the mentioned method and still flashes the green LED when connecting it in flash mode ...
According to what you said should you restart the phone connected to the usb cable?
Click to expand...
Click to collapse
Yes, connect the phone to the usb cable and restart. It works for me every time.
Sent from my F8331 using XDA-Developers Legacy app
Click to expand...
Click to collapse

dachao said:
eduardoamm said:
Yes, connect the phone to the usb cable and restart. It works for me every time.
Click to expand...
Click to collapse
Still not working, I do not know what I can do to make it work ... thanks for responding
Click to expand...
Click to collapse

Strange enough I reproduce this "flashing green-led" flashmode issue today, but it was the USB cable problem (type c -> type c).
The cable in question can access mtp mode and fastboot mode normally thou.
It is likely not the same issue like yours, but still very strange.

eduardoamm said:
dachao said:
Still not working, I do not know what I can do to make it work ... thanks for responding
Click to expand...
Click to collapse
Was solved your problem?
Click to expand...
Click to collapse

eduardoamm said:
dachao said:
I have the same problem with my XZ but found a workaround. When prompted to turn of your phone and plug it in flash mode reboot the phone instead. When the screen goes black hold the volume down, when the phone turns back on it will go into flash mode. Works for me every time.
Click to expand...
Click to collapse
For me on Xperia Z5 too!! Thanks!!
Click to expand...
Click to collapse

same problem can not enter flashmode but can enter fastbootmode....

I have the same problem.
I've found that my phone does not enter flash mode at the first Led flash, so plug the cable while hoding volume up (fastboot mode), if the led just flashing blue then I hold volume down to get into flash mode. else if it connected in fastboot mode then i just unplug it and do again.

Thanks for the tip! Works well with my Xperia XZ + Lenovo T460 + Aukey USB cable combo.
Had a headache with phone not entering the flash mode. Flashtool said it's connected in recovery mode, usb debugging off. Perhaps sth to do with trying to update the TWRP to the latest version (3.2.2) via the PlayStore app and turning the recovery non-functional. I wanted to update to the latest FW before reflashing TWRP in fastboot mode.