First post, by jcarvalho
Hi guys, I have bought this board for cheap https://computer-retro.de/Bilder/Mainboards/P … miBios-1992.jpg . Because my 386 VLB is giving the error "RTC is not updating system halted" and it doesn't have DALLAS chip is an opti 895 ans SIS chipset
The M396F as a lot of corrosion under the battery that I removed. It has a broken trace that goes from the resistor near the keyboard plug that I already fixed.
I use a cheap chinese 4 digit diag card and it stops at 13.12, going to http://www.bioscentral.com/postcodes/amibios.htm it doesnt have the 13 code for motherboards after 1990, but before 1990 the error says "System-interrupt vectors initialized". The states are sequential? like after 13 comes 14 "8042 keyboard controller checks OK"? Could it be the keyboard controller bad? I already dessoldered the keyboard socket because it has green pins and need to buy another one to replace.
Can someone point me a way to repair this mobo? Mine is like in the photo but more corroded under the batt. And I cant see what traces are gone.
Thanks,
Jorge