486 Mobo - System RAM Failed

Zenith data systems / 150-0824-p2
February 11, 2011 at 06:52:47
Specs: DOS 6.22, DX50 - 32 MB EDO RAM

I booted up my Zenith 486 motherboard today to try out a shiny new 32 MB Compact Flash card on it. It booted fine at first and reported a keyboard error. My mistake, wrong PS/2 port. Switched the keyboard to the other port, powered up and booted into the BIOS and it hung.

Off/on again, and I got this message:

0000000K System RAM Failed at offset: 0006 Failing Bits: 0039 5252

Off/on again, error code beeps

Off/on again, the board prints out the first few words of the normal screen, then hangs.

This board had been sitting in a garage, covered, for a few months. There is a bit of salty looking stuff on the back of the PCB and on the metal parts of the system RAM. Longshot though it may be, could this be causing the problem? Or is it time to give this aged board a burial? :(

See More: 486 Mobo - System RAM Failed

Report •

February 11, 2011 at 07:00:10
What would be the point in trying to use it, it's a dinosaur. RIP :))

Report •

February 11, 2011 at 07:13:02
What kind of RAM are you using? It may be EDO RAM and not supported by your mobo. Also, have you tried cleaning the the SIMs and reseating them?

P.S. I would agree that it is a waist. I threw away like 20 486 mobos back in 2000 and never looked back. You can get a virtual machine program for you new computer that will emulate a 486 if you need one.

Report •

February 11, 2011 at 07:52:24
If you had a dinosaur in your backyard, wouldn't you do everything you could to keep it alive? This board is a dinosaur in another way; it may not -relatively- be as powerful as it once was, but it was a velociraptor in its day. It murdered 386's, and the 286's didn't stand a chance. That same respect and awe people hold for dinosaurs today, I hold for this dinosaur of the x86 era. :P

'Raptors don't need a point:





Report •

Related Solutions

February 11, 2011 at 11:54:01
Doesn't sound like anything you did would have caused the problem as long as it was powered off when you switched it back. Try cleaning the board with an electronic spray cleaner, or just some alcohol and an old toothbrush. Especially the ram slots. Make sure you remove the cmos battery first and use the 'clear cmos' jumper to discharge it.

Might also be a loose solder joint somewhere.

How about those Packers Steelers Packers!

Report •

February 12, 2011 at 18:06:01
Alright, the board is working again. I was concerned that the actual on-board RAM might have been fried, but a simple brushing of the EDO DIMM's contacts got rid of the error.

I'll save the toothbrushing for another day :) Won't be the first time I've cleaned a board that way.


Report •

Ask Question