flash insyde bios with ch341

[yakka]

Hello guys,
I have an HP laptop with a corrupted BIOS (CAPS LED blink 2 times -> BIOS corruption failure ). I don't know what happened to this laptop as it is not mine.
When I read the bios chip with my CH341, it seems completly "crypted".
I there any solution to check if the chip content is correct?

Another request:
Bios chip is w25q32fvsig, it should be a 4M flash and the FD file extract from the exe I found on HP support web site is more than 4M (4 589 056 bytes)
Is it normal?


Model #: 15-af111nf
Bios file from HP is sp80569

Thanks

[DeathBringer]

Where I can see completly "crypted" dump?

[yakka]

When you open a rom file it usually contains understandable strings.
In that case, nothing, only hex bytes.
http://www.cjoint.com/c/GIyjARopveJ

[DeathBringer]

Get 08137.fd fie from sp80569.exe
Decrypt it by hewprsa.exe to 4M-size file.
Write it by CH341A.

[yakka]

Great !
Any possibility to retrieve all the info from dump (serial number...)?

[yakka]

Where can I find the RSA signature ?
Command line is hewprsa.exe -d bios_in.fd -o bios_out.fd -s out.sig

[DeathBringer]

Any possibility to retrieve all the info from dump (serial number...)?

Your dump is almost empty.

Where can I find the RSA signature ?

Use without it:
hewprsa.exe -d bios_in.fd -o bios_out.fd

[yakka]

Where can I find the RSA signature ?

Use without it:
hewprsa.exe -d bios_in.fd -o bios_out.fd

I have a error when I don't put the RSA sig
http://www.cjoint.com/c/GIyqUwBtF5J

[DeathBringer]

Try this version.

[yakka]

Thanks, file is now 4096 kb!
I'll update the chip next week and keep you update.

Is there any possibility to have fill some parameters I lost (S/N, Windows license...)