Near the battery, there are 3 red glass diodes, if you remove the middle diode, you can replace the old bad battery, with a lithium cell socket, and put a new battery in, and you have a working system. By the way, most 486 128kb bios chips can be replaced, with a newer 256kb bios chip, and can be …

Does someone has one of those, and where can i find jumper settings for it, and maybe newest BIOS.