Z5 & Z2 flashing red LED - Xperia Z5 Q&A, Help & Troubleshooting

So I picked up some phones to try fixing up, a Z5 and a Z2 both which have the flashing red LED issue, neither seem to respond with any of the reboot vibrations when holding respective key combinations & when left on chargers for long periods go from flashing red to no LED activity at all (assuming this is when the battery is at full charge as disconnecting the battery causes the flashing to resume and reconnecting causes it to cease).

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[Q] Xperia E Total Hard Brick

I came across an Xperia E device for flashing. But its hard bricked I guess.
So far, I've tried to revive it all alternatives except for disassembling the handset.
1) Does not charge with any charger.
2) Have used different batteries.
3) Does not recognize in Flashmode or Fastboot mode
4) USB is not recognized at all.
The only hope that seems to come from this handset is,
Sensor light. This is 'not the Red Light' that comes while charging or powering on.
A small light deep in the sensor appears when doing the following actions:
1) Connecting charger with or without the battery, activates this sensor light.
2) With the battery, when I power it on, the sensor light appears till I release the power button.
3) When doing the power cycle reset option using the volume down or volume up with power button combinations, the sensor light stays till I release the power button.
So there seems no life, in this except for this faint red light in the sensor.
Any ideas?
By the way, this seems to have happened after a full reset including the internal storage using the factory settings reset option.
Device uses a custom rom.
Take Out the Battery!
Hold Volume Down!
Plug in Charger - MAKE SURE ITS FROM WALL SOCKET NOT PC!
YOU SHOULD BE IN FLASHMODE!
UltraGamerHD said:
Take Out the Battery!
Hold Volume Down!
Plug in Charger - MAKE SURE ITS FROM WALL SOCKET NOT PC!
YOU SHOULD BE IN FLASHMODE!
Click to expand...
Click to collapse
I got a Sony Xperia E C1505 (Rooting Status: Bootloader unlock allowed: No).
I have flashed it with free a firmware (C1505_11.3.A.2.33_CE.ftf) and made a backup of the TA partition.
Later the cellular is rebooted and does not boot again anymore, staying in a difficult state of hard bricked and the symptoms are same described by shaam_viru.
In general:
- Volume up down no response (obvious)
- Volume key down no response
- Any USB device (MTP, MSC, Flashmode) is not recognized
- The battery does not charge (wall socket was used not PC)
- Phone do not turn on with or without the battery and the adapter plugged
- Turned on with the battery or with the adapter, the device is limited to cast a faint and fuzzy flow of red light
Greetings.
same problem
I am currently facing this same problem on my device......IT happened as soon as i wiped my internal storage(factory reset including data deletion)....I was on a custom rom as well...The symptoms are the same as the first post.
If someone can help me i would be very grateful

Red flashing but cant turn on??

Hi, I have a Sony Experia Z3. Great phone Was loving it. However I woke up this morning To a frozen screen. The screen then went blank and I now can't seem to charge it or turn it on. I have tried all kinds of resets but nothing seems to work any ideas??
Please??
try this first -
a. plug your charger into a wall socket
b. connect your phone & leave it for a few minutes
c. hold the power button and the volume button down together for at least 1 minute
d. expect to see a red LED/no charge indicator
e. release both buttons
f. push volume up
g. expect to see an empty battery graphic onscreen
h. now press the power button and it should charge normally
Also try connecting via the magnetic charge port. That usually fixes mine when it won't turn on
Try a few hours charging (maybe a battery issue) and try turning it on or just exchange if that fails. A similar issue on my HTC One X was due to a motherboard failure, eventually it would not turn on at all and had to get mobo replaced.

[E] Xperia E doesn't turn on, only red light

Hello,
I tried to power on my old Xperia E, but it only shows a red light.
When i charge it, it mostly blinks red, but sometimes it power on and goes of immediately.
I think it had TamsuiCM11.
I don't care if it is working or not, i'm just interested if i can get it working again.
Thanks.
I was saw a solution about that. It says: Eject the battery, later long press to power button (Nearly 10 second). And the last of: Plug the battery to phone.
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My solution: If you charging your phone with computer, you should try phone's charge adapter.
My solution: never again Sony...

Dead phone, red charging light & start up screen loop after dropping it

After dropping my XZ on a table, it just went completly dead. The device switched off and wouldn't start again. So I tried to charge it, and hoped for the best, but when I connect it to a charger something strange occurs. The small red charging light comes on, and the black "SONY" text on a white background shows for a few seconds, then the device shuts off and the red light disappears. And from there on it just loops from black screen to red light -> sony logo -> black screen no red light -> red light -> sony logo -> black screen no red light and so on.
I've tried 2 different chargers (for several hours), tried starting it holding vol up and also starting it holding vol down. Tried connecting it to a computer with the xperia companion software, but it doesn't show any signs of connection. The SD card is removed.
I assume it has to be some kind of hardware issue (relating to the drop, yes i was drunk). But does anybody have experience from this problem and might advise what part is broken?
What you actually did with your mobile, step by step.

Weird Hardware issue on Galaxy S7 - will boot maybe 1 out of 20 times

So I have an old Galaxy S7 that has some very weird hardware issues. Essentially:
* Pressing the power button will not turn it on maybe 19/20 times.
* Pressing the power + down volume + home has a slightly higher success rate but still very low
* When plugged in to a charger there is often no light indicating charging is happening
* When the phone is booted, it works perfectly fine, and will remain on and functional for over a week in airplane mode
* If I plug the phone in to charge it when it is on, sometimes it charges fine, other times it turns off and will not turn back on - but the red charging light remains permanently on even when unplugged. I hard reset it by holding down the power button, and it won't turn back on afterwards.
* I have replaced the battery to the phone, initially, this was the problem - as soon as I plugged the new battery in the phone it immediately booted and was fine
* Voltage from the battery is currently 3.98 volts
(ignore the missing components in the image, they're irrelevant)
I'm thinking the charge port or the charging mechanism is the problem here, would I be correct? Is 3.98V too low to boot the phone? (battery is rated at 4.4V)
The part that's confusing me is why would it boot some of the time?

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