Today I tried to recover three MB, an ASUS P2B-F, a Compaq Camaro (Mitac), and an ASUS K8N-E Deluxe, with the first I have to do a test, to rewrite the BIOS via floppy (recovery BIOS), but if not the only solution is to change the BIOS chip with another (probably new one), if that doesn't work, I don't know what else to check or try.
For the second one, the Mitac I have to try some tracks on the back, maybe one or more are interrupted or damaged, if I find one interrupted, it could be fixed and the card maybe works again.
To finish the K8N-E Deluxe, I tried to install Windows on a 40 GB WD SATA disk, via CD reader, no version installs, tried from 98 to XP and even 7, when writing to the disk the installation stops block.
The only thing 😨 I can do is change the location of the SATA cable, but I don't think it will make any difference.
AMD 286-16 287-10 4MB HD 45MB VGA 256KB
AMD 386DX-40 Intel 387 8MB HD 81MB VGA 256KB
Cyrix 486DLC-40 IIT387-40 8MB VGA 512KB
AMD 5X86-133 16MB VGA VLB CL5428 2MB and many others
AMD K62+ 550 SOYO 5EMA+ and many others
AST Pentium Pro 200 MHz L2 256KB