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[Q] Can only boot by plugging charger????

Hi
Can anyone help please? Also, are there anyone having similar issue.
Issue: Pressing the power button is not starting my device. In order to power on I have to connect charger (not usb with PC) and then press power button. What I have noticed is that once I switch off my phone it gets in to "emergency/recover mode". I came to this conclusion because after I switch the phone off, take battery out and put back in and then connect usb cable with my PC. I can see OMAP driver loads and also in the PC's Device Manager I am able to see LG CDMA.... under "ports".
It was not like this until i started several attempts to flash baseband.
Sequence of actions
Here is the sequence of actions I went through and end up having my phone at this stage
1. Followed the procedure (http://forum.xda-developers.com/showpost.php?p=17177547&postcount=2) step by step using LG flash tool. The application was constantly crashing (PC is running on XP pro). Before flashing baseband I flashed GB hence I lost radio.
2. To bring back my radio I had to reflash 2.2 following the same procedure (emergency recovery method) in the link given in baseband flashing.
3. After finishing the recovery flash I could not start my phone using power button. I started thinking that I bricked my phone. I left it for a day. Then I thought that the battery is fully drained and is the reason for not powering on. When I connected charger I started seeing LG logo and also the phone was started. I was more excited and happy that my phone was not bricked. After this point I need charger connected everytime when i want switch on my phone. so, I am scared to swtich off my phone unless I have charger handy to me.
4. I removed all the application (LG flashing related) including LG drivers I installed before. Now I reinstalled all the necessary app and drivers for baseband flashing. This time baseband flashing was done successfully (though at 22%). Then I flashed GB rom and everything works fine.
The only issue i have is, I can not switch on my phone without charger connected.
If anyone knows solution please help me.
Thanks in advance.

http://forum.xda-developers.com/showthread.php?t=1331390
I used to have the same problem,
I think its a problem about boot,
when I use lg tools it always gives error, because phone wont boot without charger, so it cant continue upgrading
I try flasing original kdz file from lg flash tool, and use emergency rescue mode,
I dont know but it somehow repair the boot
you can fix permissions before you use lg tools.
what error do you have while using lg tool?
can you post the screen capture

nurikarakaya said:
http://forum.xda-developers.com/showthread.php?t=1331390
I used to have the same problem,
I think its a problem about boot,
when I use lg tools it always gives error, because phone wont boot without charger, so it cant continue upgrading
I try flasing original kdz file from lg flash tool, and use emergency rescue mode,
I dont know but it somehow repair the boot
you can fix permissions before you use lg tools.
what error do you have while using lg tool?
can you post the screen capture
Click to expand...
Click to collapse
After i uninstalled all the drivers (incl. LG tools) and reinstalled and I am not seeing any more error while using LG tools. I even flashed GB baseband twice but no use. The link you have given explains the same issue I have.

I think you have to install froyo version of baseband and firmware first,
then try
http://forum.xda-developers.com/showthread.php?t=1186406
STUCK AT LG LOGO:
with factory reset!
1) Start LG Mobile update
2) Power off your phone without USB cable
3) Connect the USB cable and wait for the LG logo and the annimation battery
4) Pressing Vol.up + power 6-7 seconde wait for the LG logo and The screen turns off
5) Again pressing Vol.up + power 6-7 seconde and wait until the drivers are installed (LG Mobile update detects your phone and the screen is always off)
-If this is the first time the driver install redone the item 5).
6) Click on User/Support then emergency mode, insert your IMEI and click on check
7) Wait for download and upgrading (15/20 min)

Questions or Problems Should Not Be Posted in the Development Forum
Please Post in the Correct Forums and Read THIS
Moving to General

lufc said:
Questions or Problems Should Not Be Posted in the Development Forum
Please Post in the Correct Forums and Read THIS
Moving to General
Click to expand...
Click to collapse
Thanks. will stick to the rule in future..

nurikarakaya said:
I think you have to install froyo version of baseband and firmware first,
then try
http://forum.xda-developers.com/showthread.php?t=1186406
STUCK AT LG LOGO:
with factory reset!
1) Start LG Mobile update
2) Power off your phone without USB cable
3) Connect the USB cable and wait for the LG logo and the annimation battery
4) Pressing Vol.up + power 6-7 seconde wait for the LG logo and The screen turns off
5) Again pressing Vol.up + power 6-7 seconde and wait until the drivers are installed (LG Mobile update detects your phone and the screen is always off)
-If this is the first time the driver install redone the item 5).
6) Click on User/Support then emergency mode, insert your IMEI and click on check
7) Wait for download and upgrading (15/20 min)
Click to expand...
Click to collapse
Thanks. I will try it tonight or will wait for official GB release then i can do the this emergency update.

Emergency mode LG P500

After flashing baseband, second time today, my phone go to emergency mode during flashing and after half hour and more nothing happend. Now, phone is always in emergency mode, and nothing i can to do. Backup i have, but LGMDP-v1.5 dont recognize phone and i dont can go to recovery mode. And KDZ Updater dont see phone.
Does for this phone has hope?
p.s. Sorry for my bad english.

Just don't mess with it now!! Just take it to service center they'll fix it!! If u try repairing it on ur now brick it totally!!! Just don't mess with it just take to service center!!!!!
Sent from my LG-P500 using xda app-developers app

Ok. Tnx ..

You can remove the battery IF YOU WERE FLASHING BASEBAND ONLY
then put battery back and press vol up + back + power and phone will go in emergency mode
disable all lg modems in device manager, then flash baseband again and it will work

I remove battery ~10 times, and phone always automatticly go in emergency mode when i back up battery, but device is not recognize by tool like a LGMDP-v1.5, lg studio kdz updater on computer.

1. remove battery
2. put battery back
3. press power button+ volume up button + back button together
4. keep buttons pressed and phone will go in emergency mode
5. now lgmdp will recognize device

@TheAndroidGeek
I do what you write to me, and lgmdp recongnize the phone but when i click connect button lgmdp is notifier with message 'Error! can't open serial port (rebot and reconnect).'
What next?

goran9888 said:
@TheAndroidGeek
I do what you write to me, and lgmdp recongnize the phone but when i click connect button lgmdp is notifier with message 'Error! can't open serial port (rebot and reconnect).'
What next?
Click to expand...
Click to collapse
Disable modem drivers (LG) in Device manager!

In Device Manager is disabled only LGE Virtual Modem because he is only there. But error is still there in lgmdp.

Hooo ...
I back phone in life with this tutorial: http://forum.xda-developers.com/showthread.php?t=1197111
Thanks to xzet2 for that tutorial.
Now, i installed this ROM: http://forum.xda-developers.com/showthread.php?t=1818219
But i dont have service again (no signal - baseband is unknown). With android 2.2.2. is all ok (have service, baseband v10e is show and all work ok) but i want ics.
I trie to flash baseband to P500-v20G but lgmdp dont see phone when this ics rom installed. When installed android 2.2.2 lgmdp see phone.
In Device manager LGE Virtual Modem is disabled.
What to do?
Does ok to install ROM with android 2.2.2 and then flash baseband on v20g version and then install ics, or what?

And again hoooo ...
I start phone in emergency mode, run lgmdp and flash baseband. That all work 10 seconds, and wala ... now i have new baseband and ics rom.
Thanks!

Emergency mode and only lg logo
Hi,
MY lg p500 suddenly stopped working. upon switching on it only shows LG logo... tried hard set button. but nothing worked. searched on google, find kdz, lgmdp, android adb ( fastboot mode) , LG Utils....i tried all the option but nothing seems to work....
i realised that my micro-sd got corrupted causing this problem then i changed my card and again tried but finding same situation.
1.=when i detach my usb and remove battery and again putting battery and pressing combination of " RETURN + VOL UP + POWER" my phone goes into EMERGENCY MODE.
2. when i put usb cable, its just shows lg logo, nothing else. on pressing HOME BUTTON , it shows
" FASTBOOT MODE STARTED
UDC_STARTED()
-- SUSPEND--
--RESET--
--PORTCHANGE--
--RESET--
--PORTCHANGE--
is there any hope to bring it into life ?????
Please help me
p.s :
1. KDZ UPDATE : I TRIED V20D.00.KDZ FILE . it show " upgrade error error code =6" .
( tried all three mode " DIAG, EMERGENCY, CS_EMERGENCY) but got same error for all the mode option.
2. lgmdp : upon connecting doesnt shows any thing in NV backup .
3. Android adb : on doing "fastboot erase recovery" it just keep on showing " waiting for device"....
4. LG utils : on selecting "I" option ( for extracting kdz ) the LG utils carshes.
is there any hope for my phone ????

thanks a lot, its works
Thanks a lot, it works perfect.
TheAndroidGeek said:
You can remove the battery IF YOU WERE FLASHING BASEBAND ONLY
then put battery back and press vol up + back + power and phone will go in emergency mode
disable all lg modems in device manager, then flash baseband again and it will work
Click to expand...
Click to collapse

I went to update my lg p-500h and it went into emergency mode anyway I can get my phone back up again

Problem after installing 4 button/overclock

I have a big problem with my Lg optimus 3d with Darkroom ICS.
After that i tried to install overclock with 4 keys fix from this thread http://forum.xda-developers.com/showthread.php?t=1982744
my phone wont boot up. Here is a link to show you the problem: http://www.youtube.com/watch?v=BfdHevSyR0c&feature=youtu.be
the last thing I do in the video is holding power+vol up+3D and then I get a error screen in Korean.
When i try to connect it to my computer it just wont stay connected. (The connect and disconnect sound beeps with around 3s between)
Do anyone have a suggestion on how to fix this?
Sincerely, Henrik

Try this:
-keep battery in
-hold vol+
-connect usb (hold vol+ 'till you enter download mode)
-flash ICS via LG FlashTool
oh and make sure you've installed the whole drivers.. (for omap4430 etc)

HenrikSwe said:
I have a big problem with my Lg optimus 3d with Darkroom ICS.
After that i tried to install overclock with 4 keys fix from this thread http://forum.xda-developers.com/showthread.php?t=1982744
my phone wont boot up. Here is a link to show you the problem: http://www.youtube.com/watch?v=BfdHevSyR0c&feature=youtu.be
the last thing I do in the video is holding power+vol up+3D and then I get a error screen in Korean.
When i try to connect it to my computer it just wont stay connected. (The connect and disconnect sound beeps with around 3s between)
Do anyone have a suggestion on how to fix this?
Sincerely, Henrik
Click to expand...
Click to collapse
well idont know
trie to conect the usb cable and trie to enter download mode
and re flash xball ics port

TMProduct1onZ said:
Try this:
-keep battery in
-hold vol+
-connect usb (hold vol+ 'till you enter download mode)
-flash ICS via LG FlashTool
oh and make sure you've installed the whole drivers.. (for omap4430 etc)
Click to expand...
Click to collapse
Thanks! :good:
I have successfully been able to enter download mode. I have also installed omap drivers and LG drvers. But
LG flashtool dosent start the flashing process. Any sugestions on how to solve this?
I have been looking around on other guides and the all say you need to connect your phone without the battery, but I cant do that as my phone wont stay connected.
Sincerley, Henrik

I just did mine. Leave the battery in. Connect your phone and it will power up for 3 secs then power off repeatedly. While this is happening, hold Vol + and Power and you'll enter download mode with the korean screen. Flash ICS404 again with LG Flash tool or smart flash (I used smartflash cos it was simpler and quicker)

LeighR said:
I just did mine. Leave the battery in. Connect your phone and it will power up for 3 secs then power off repeatedly. While this is happening, hold Vol + and Power and you'll enter download mode with the korean screen. Flash ICS404 again with LG Flash tool or smart flash (I used smartflash cos it was simpler and quicker)
Click to expand...
Click to collapse
Thanks man!!
Solved my problem. also changed the com port from 6 to 41 seemed to have helped.
Great to have this community of experts that can help you. :good::good:
Sincerely, Henrik

That files works only with wkpark method, i wrote it in the first post
Please read all before flash
Anyway was not necessary to reflash all the rom, you can just fix through wkpark fastboot

[Completed] Lg g3 download mode not working.

Hi everybody there. Am facing a huge problem on my LG G3. I don't know exactly what LG G3(Verizon,Sprint or whatever) it is. I am Malian (West African) and the phone was working fine. One morning it just didn't turn on normally. when I turn it on the sceen lights up and won't even progress to LG logo. Just a dimmed screen with black background. When I hold Vol+ down and plug the phone to my laptop it brings me to recovery mode with the red danger panel on the android logo. From there I can access recovery mode by clicking on the Power key. I see the different options(reboot system now,apply update from ADB etc.) To resolve it,I referred to a former threat . I downloaded Europe Common 16G D85510A_00.kdz ( hope this matches my 16GB G3) from a previous thread and tried to apply it thru LG flash tool 2014 but it's impossible because of,I think,the absence of download mode. I also tried holding down Vol- and plugging the phone. Drivers are installed but when I begin flashing the Lg support tool pops up and says phone is not connected.Briefly let's say that Recovery mode works but not download mode. Please help!!!: confused

TIM OF GOD said:
Hi everybody there. Am facing a huge problem on my LG G3. I don't know exactly what LG G3(Verizon,Sprint or whatever) it is. I am Malian (West African) and the phone was working fine. One morning it just didn't turn on normally. when I turn it on the sceen lights up and won't even progress to LG logo. Just a dimmed screen with black background. When I hold Vol+ down and plug the phone to my laptop it brings me to recovery mode with the red danger panel on the android logo. From there I can access recovery mode by clicking on the Power key. I see the different options(reboot system now,apply update from ADB etc.) To resolve it,I referred to a former threat . I downloaded Europe Common 16G D85510A_00.kdz ( hope this matches my 16GB G3) from a previous thread and tried to apply it thru LG flash tool 2014 but it's impossible because of,I think,the absence of download mode. I also tried holding down Vol- and plugging the phone. Drivers are installed but when I begin flashing the Lg support tool pops up and says phone is not connected.Briefly let's say that Recovery mode works but not download mode. Please help!!!: confused
Click to expand...
Click to collapse
Hi, thanks for using XDA assist!
Please ask your question here:
http://forum.xda-developers.com/lg-g3/help/help-thread-lg-g3-question-t2947298
That's a friendly help thread, specifically for the LG G3. You'll get the help you need there.
Good luck!

Thread closed.

LG G3 LS990 Won't go on firmware update mode (screen turns of and led light popping on blue and red)

I'm having trouble with my LG G3 LS990, it came with modified software (was marked as Verizon 985) and stuck on android 4.4.2, i even tried to download an update when using the phone but it failed when it tried to install, i tried with the mobility support tool but i couldn't update the phone, so i tried to flash another firmware (the stock one for Verizon 985), it was stuck at 10%, then i disconnected and reconected several times, i used LG Flash Tool 2014 and LG Up, i tried 3 different archives, 2 was KDZ and one was TOT (which is android marshmallow), i accidentally tried the refurbish mode with the TOT Marshmallow and then canceled, i came back to upgrade mode and i could get 11 porcent progress on LG Up flash tool and 1 porcent on the Firmware Update screen on the phone when trying to flash (and the same results on LG Flash Tool 2014), it was stuck again so i disconnected, removed the battery and tried again but my smartphone won't go on firmware update mode anymore, when i hold the volume up button while connected to my computer it goes to the firmware update mode for about 2 seconds and a message at the top of the screen says "Boot Verification Fail!" "Cause: MISMATCH_SIG_LEN" and then the screen turns of, the led starts popping with blue and red and when i press the volume up again the led stops popping but the smartphone stills on, when i start the phone normally it shows the LG logo and then it shows the android bot showing some gear moving on his belly, and then it restarts and goes directly to the LG Logo and stops on it while the Led pops in blue and green. I can even go into System recovery mode but nothing works, the USB Debug mode or the Factory data reset. When the smartphone is connected to my computer it doesn't recognize the smartphone anymore, when the LG Logo is showing and i go in the Device Manager it shows "LG Mobile MTP Serice" but when i use the LG Up for example, it shows the smartphone as an unknown device and i can't do anything, the same happes to the LG 2014 Flash Tool, when i try to flash it goes to 4 porcent and then says that the smartphone is not connected. I'm into this for 3 straight days, any help? I'm a noob, i really need som help.

Try installing the LS990 firmware again and see if that works
And never disconnect the device during tha flashing process , try to see if you can get it into qualcomm q9008 mode (I think is called that)