The machine was working “fine.” Added memory. On POST, 1/20th of a second message flashes by – “NVRAM error” and then nothing; so set jumper to reset CMOS. That produces an equally quick message of “CMOS checksum error” — all this happens during the POST — no access to diskette, etc has yet occurred. Question is: how to re-flash the CMOS / NVRAM with a last / any known good? Keep in mind, the POST does NOT complete!
