Dell g3 15 no video, no backlight

[Francisco.s]

Hi, have a Dell g3 15 with motherboard la-f611p.

It responds to power button, and seems to start normally but with no video and no backlight.

Caps lock led lights-up, fan spins and also reads the usb connected in left usb port. (reads usb two times and seems not to do anything else)

With ctrl + alt + del, it reboots and caps lock lights, reads usb, and nothing else.

i have programmed a new good bios dump, but nothing changes.

Now I'm trying a usb bios recovery. (just in case flash content in kbc MEC1416 is corrupted)

For that matter I've download bios file from Dell website, G3_3579_3779_1.12.0.exe, rename it to BIOS_IMG.rcv, and put it in a 2 Gbytes fat32 formated pendrive.

Laptop boots and reads from the pendrive but never stops.

I've tested the same pendrive with ctrl + esc, but nothing changes.

Can somebody help with this bios recovery process?

Thanks.

Seems a little strange to put an executable file in a pendrive, but new bios are powerful.

[Francisco.s]

Re: Dell g3 15 no video, no backlight

Seems a little strange to put an executable file in a pendrive, but new bios are powerful

The instructions are taken from Dell website, but are wrong:

https://www.dell.com/support/article...uter-or-tablet

The correct way are explained here:

https://www.reddit.com/r/Dell/commen...structions_on/

I will try this way and post if it works.

[Duranitron]

Re: Dell g3 15 no video, no backlight

try to connect external monitor and boot it. maybe the lcd is busted.. try to revert the bios to the original program..

[Francisco.s]

Re: Dell g3 15 no video, no backlight

try to connect external monitor and boot it. maybe the lcd is busted..

Thanks, it has been tested with an external monitor but no video either.

I think bios is corrupted, and only boot block is fine.

In other link I can download the BIOS_IMG.rcv, but it has almost the same content as bios (G3_3579_3779_1.12.0.exe)

This is the link mention above: https://www.dell.com/support/home/es...15-3579-laptop

Could be that boot block knows the part of the file that is the bios data and extract it in order to flash the bios chip, but it does not function for me.

Anybody has made this process recently?

[SMDFlea]

Re: Dell g3 15 no video, no backlight

Dell has a HDD recovery method as well,try both. If you can`t get it recovered then make a backup of the bios and post it in the bios requests section for fixing.

https://www.dell.com/support/article...30-pcs?lang=en

[SMDFlea]

Re: Dell g3 15 no video, no backlight

Another member asked for the same bios today,you can try it if recovery doesn`t work https://www.badcaps.net/forum/showthread.php?t=81463

[Francisco.s]

Re: Dell g3 15 no video, no backlight

Dell has a HDD recovery method as well,try both. If you can`t get it recovered then make a backup of the bios and post it in the bios requests section for fixing.

https://www.dell.com/support/article...30-pcs?lang=en

Hi, in that link explains how to get .hdr file from xxx.exe: C:\<downloaded BIOS file location>\<downloaded BIOS filename.exe> /writehdrfile /writeromfile

The "/writehdrfile /writeromfile" does not works in G3_3579_3779_1.12.0.exe, seems that they have made some changes in that process.

[SMDFlea]

Re: Dell g3 15 no video, no backlight

I sent you a PM .See post #6 ,posted a few moments before your last post.