Dell e5440 turns on but the screen remains black

[poweron]

hello, this Dell turns on but the screen remains black, if I press the power button a second time the fan turns at max and turns off, the voltages I measured in the pads are all, I tried to warm the cpu / gpu chip but nothing has changed, could it be a bios problem?

[piernov]

Re: Dell e5440 turns on but the screen remains black

Make sure RAM is good and compatible, and that you tried disconnecting any devices.
If CPU VCore is present, try to flash the BIOS.
Don't mess with the GPU or the CPU themselves randomly.

[mcplslg123]

Re: Dell e5440 turns on but the screen remains black

Screen remains black-Do you mean backlit ok and no data??

[poweron]

Re: Dell e5440 turns on but the screen remains black

Screen remains black-Do you mean backlit ok and no data??

no, no data and nothing backlit, even on hdmi

[poweron]

Re: Dell e5440 turns on but the screen remains black

Make sure RAM is good and compatible, and that you tried disconnecting any devices.
If CPU VCore is present, try to flash the BIOS.
Don't mess with the GPU or the CPU themselves randomly.

yes, VCC_CORE is present 1.7v which of the two bios do you need to flash U1 or U2?

[poweron]

Re: Dell e5440 turns on but the screen remains black

I flashed U2, the programmer ch341a told me file length, beyond range of will be ignored, I turned it back on, now the LED flashes 5sec on and 5 sec off and does not start, maybe the file is not right or I have to flash U1 too ?

[flatline]

Re: Dell e5440 turns on but the screen remains black

Are you using those clip things to connect the ch341a to the bios chip while on motherboard? I have found that it doesn't always work 100%. I take off the chip and solder directly to ch341a pads, and yes, flashing U1 might work. But save your original .bin first of course. I have a e5440 board with dedicated graphics if you need those two .bins. I'm not sure what's wrong with it though. I know it's not the bios.

[poweron]

Re: Dell e5440 turns on but the screen remains black

Are you using those clip things to connect the ch341a to the bios chip while on motherboard? I have found that it doesn't always work 100%. I take off the chip and solder directly to ch341a pads, and yes, flashing U1 might work. But save your original .bin first of course. I have a e5440 board with dedicated graphics if you need those two .bins. I'm not sure what's wrong with it though. I know it's not the bios.

no, I don't use the clips, I hold the chip directly on the ch341a, I will try to flash U1 too then we see how it goes

[poweron]

Re: Dell e5440 turns on but the screen remains black

I gladly inform you that after flashing U1 the screen turns on,although ch341a says file length etc etc, it probably doesn't affect
, thanks to everyone for the valuable advice,
regards

[poweron]

Re: Dell e5440 turns on but the screen remains black

everything works fine only when I turn it on the screen comes after 20 sec. I also downloaded a last 8 mega bios, downloaded from the dell site, but the problem remains, it can remain even so but if I can improve it is better

[SMDFlea]

Re: Dell e5440 turns on but the screen remains black

Clean the ME management engine firmware: https://winraid.level1techs.com/t/gu...lization/31277

[poweron]

Re: Dell e5440 turns on but the screen remains black

I thank you, but how should I move to analyze and eventually clean my bios?

[SMDFlea]

Re: Dell e5440 turns on but the screen remains black

You have a dual bios,you should flash U1 and U2 .If you can`t clean the ME yourself make a new post in the bios requests sub forum ,post both your original bios backups https://www.badcaps.net/forum/forumdisplay.php?f=40

EDIT: what is your service tag number .

[poweron]

Re: Dell e5440 turns on but the screen remains black

the service tag is: 13HGYZ1, bios version A04 can the bios be loaded from a usb key?