MSI WindTop AE2420 AIO No signal after BIOS Flash

[REpairAT]

Hi there,
I'm facing following problem:
- Accidently flashed BIOS and EC FW of the "3D" Version (No warning message or anything from MSI's flash tool!)
- Device was fully bricked after, not coming on at all
- Flashed correct BIOS bin via China BIOS Flasher from another computer
- PC comes on again, but shows no signal on the internal screen. If I connect an external via VGA, it's fully working.

What I've tried so far:
- Flashing every EC FW and BIOS I could find from MSI support with the MSI DOS flashing tools
- Connecting the internal Display directly to the mainboard without the display controller board.
- Everything in Windows with multiple drivers, but the internal display never appears as an option (Screen 1 is always the external)
- Reflowing GPU

My suspicion is, that the I overwrote some responsible area on the BIOS chip with the Chinaflasher, which otherwise stays untouched by the MSI DOS tool.

Any ideas, suggestions or Working dump file for this device I could try? Thank you in advance!

[SMDFlea]

Re: MSI WindTop AE2420 AIO No signal after BIOS Flash

There are 2 different bios versions depending on the GPU ram size https://www.msi.com/All-in-One-PC/su...ind-Top-AE2420

V4.xx for Madison-XT GPU+1GB

V6.xx for Madison-XT GPU+512MB

Use an SPI programmer .

.

[REpairAT]

Re: MSI WindTop AE2420 AIO No signal after BIOS Flash

Hi,
that's what I did - I have the 1GB Version, V4.00.
After flashing with the SPI programmer, the computer itself works, just the internal screen stays black, saying "no signal". If I connect an external screen, all works fine.

That's why I thought, the first, wrong BIOS flash killed something else, what's responsible for the embedded screen.