CF-20A5101VM black screen

[Winter718]

Hey folks,

I've got a black screen problem, some help would be awesome. I've tried flashing some of the bios bins I've found here, with folks with the same problem. I was in the middle of a bios update when I lost power. I'm most likely bricked as I only have a black screen, with green lights on and single beep powering off. I've attached a copy of my bin I pulled off the bios .

6GKSA10619

[peste]

Hey folks,

I've got a black screen problem, some help would be awesome. I've tried flashing some of the bios bins I've found here, with folks with the same problem. I was in the middle of a bios update when I lost power. I'm most likely bricked as I only have a black screen, with green lights on and single beep powering off. I've attached a copy of my bin I pulled off the bios .

6GKSA10619

read..https://www.badcaps.net/forum/troubl...before-posting

[Winter718]

So I've been at this all night and day, can't for the life of me get a bios bin from from bios update exe. Tried every bios that was posted for my cf-20 mk1. None are bringing her back to life.. all I get is a black screen with green lights. Weird thing is I'm using XGECU t48 programmer, after writing to bios successfully I reread the chip confirm that data is correct and matching with update file. But after trying to turn her on I read the winbond chip again to do a comparison with the file used they no longer mach?? I'm lost any help would be greatly appreciated.

Thanks in advance,
Alex

[Winter718]

This is driving me nuts, can anyone take a look at these and maybe explain what is happening? Bios flashes normal, after flash I compare the flashed file in HxD with the original flash file everything matches. After trying to boot the cf-20 with no success I read the chip again and compare it to the the file I flashed onto the chip they are no longer the same?? I've attached the file I'm flashing as well as the file Im reading after trying to power her on, can anyone willing to help take a look at these and explain what is going on?

[Maxpower3]

https://www.badcaps.net/forum/troubl...20#post3223669

[Winter718]

Hey Maxpower3, thank yout.
yeah looked at that the other day, I just didn't think that was the same issue as me, as my problem started with a bios update that did not complete due to the cf-20 powering off. I was working perfectly fine prior to bios update failing.
Do you really suspect I'm in the same boat?

Thank You,

Alex

[Maxpower3]

I thought for a long time that it was also a bios problem, it worked very well and black screen after saving and exiting the bios configuration
https://www.badcaps.net/forum/troubl...87#post1866387

[Winter718]

I see, going to put it under the microscope and check out said area as well as others. I appreciate you brother, thank you.
I must ask now, has your fix held up?

[Maxpower3]

this morning, I still have a problem with black screen, I will be able to do other tests

[Maxpower3]

another 20cf
no boot, black screen
after reflow chip backlight comes back and works perfectly again


the solder pads are still missing on one side

[Maxpower3]

I see, going to put it under the microscope and check out said area as well as others. I appreciate you brother, thank you.
I must ask now, has your fix held up?

the two that I repaired have been working every day since. no worries, today the 3rd, to follow

if no bios here works, try it
just heats up a little or press to test

[Winter718]

Lol, Maxpower3. You are the man, thank you brothere. You advise was on point! She's back!

[Winter718]

Reflowed , picture was before clean up of weld, but she is back. You are the best, don't know how you figured that one out, or why it's so common.

[Maxpower3]

Happy that my solution worked

the cpu is just behind
metal phone support, Just an old thermal pad.
maybe a deformation of the card or heating.
All the ones I have have a lack of solder here

Afterwards we might be lucky and the CPU heating helps.
The 6th Gen and their internal graphics

[Winter718]

Yes, lack of solder was my issue as well. Seems like the unreachable sides directly under and around metal guard or support, frame, whatever it is.

[Winter718]

Anybody know what offset or where accumulated operating hours are? Noticed one of the bin files has zero.