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Help motherboardy problems
Hello,
I have an old PC with a motherboard that doesn't have any documentation nearby. It used to work great, but today I found it in a forzen state (blank screen) that and didn't want to boot up again for a diffirence. I supposed the AT PSU was to blame, since some connector pins were visibly charred. However when I replaced the PSU and all suspicious components, the computer still refuses to boot. It seems the network card, which is connected to the board with a special cable (WOL I think) powers up and begins passing around packets, the harddrives spin up and employ their heads, but the CPU fan is perfectly still and there is nothing happening, no beep, no keyboard start, blank screen, etc, nor is the CPU getting any less cold. Since the motherboard also has an ATX plug, I am going to try with an ATX PSU and see what happens, the only problem is I don't know which pins on the motherboard are supposed to be bridged to turn it on (ATX power switch plugs). Here is what I got at the moment: POWER LED PC SPEAKER | | | | | | o o o o o o o o o ISA SLOT HERE o o o o o o o o | | | | | | RESET SW | | HDD LED TURBO LED I suppose I'd be able to get the remaining pin meanings if I knew what motherboard brand and model this is, but I do not. Can you help me there? As said the motherboard has AT and ATX power plug options; it has two onboard IDE controllers, floppy, etc; it has 3 PCI slots, 2 ISA slots, AGP (x2 max I think), 2 SDRAM slots and a CPU slot (not socket). It has an apparently non-standard USB connector (pinset), two COM port connectors, LPT port connector, PS/2 mouse connector and large DIN keyboard plug socket. The CPU in it is a 300 MHz Penitum II and the chipset has a green raidator with "Soyo" on it, the second chip of the chipset also has a label saying "Soyo". Hope I can fix this bugger. Thanks. =) -- Model: INFJ Primary function: Coprocessor Secondary function: Cluster commander Yes I'm a therian: http://www.wikitherian.org Creationism & Darwin: "The bible says humans were supposed to use animals to do work for them and I like to work so I must be an animal!" |
#2
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On Wed, 21 Sep 2005 20:16:50 +0200, Jure Sah
wrote: Hello, I have an old PC with a motherboard that doesn't have any documentation nearby. It used to work great, but today I found it in a forzen state (blank screen) that and didn't want to boot up again for a diffirence. I supposed the AT PSU was to blame, since some connector pins were visibly charred. However when I replaced the PSU and all suspicious components, the computer still refuses to boot. Charred connectors "could" (maybe) be because the contacts were fouled, but I'd sooner suspect some other (motherboard or card) components were shorting out and that these faulty components might need replaced. You might unplug all non-essential boards for the time being, then examine the video card and motherboard capacitors, other parts. It seems the network card, which is connected to the board with a special cable (WOL I think) powers up and begins passing around packets, the harddrives spin up and employ their heads, but the CPU fan is perfectly still and there is nothing happening, no beep, no keyboard start, blank screen, etc, nor is the CPU getting any less cold. Since the motherboard also has an ATX plug, I am going to try with an ATX PSU and see what happens, the only problem is I don't know which pins on the motherboard are supposed to be bridged to turn it on (ATX power switch plugs). If you have confirmed the AT PSU you tried, worked, why expect an ATX to work? I doubt it will. Here is what I got at the moment: POWER LED PC SPEAKER | | | | | | o o o o o o o o o ISA SLOT HERE o o o o o o o o | | | | | | RESET SW | | HDD LED TURBO LED I could guess that it's the two pins between the Reset and Turbo LED pins, but downloading any manual from that era for a Soyo board would probably show a common pinout used on the board the manual is meant for- but also same pinout for yours. There might also be another jumper you must move before trying an ATX power supply. That too would be in a manual if it's not labeled on the board (could be hard to see/read even if it is). In that case, of course you would need a manual for one of their dual-PSU capable, (usually Baby AT form factor) boards. I suppose I'd be able to get the remaining pin meanings if I knew what motherboard brand and model this is, but I do not. Can you help me there? Based on what you wrote below it's a Soyo, maybe some derivative of Sy-6BB. If you find nothing else closer then try the SY-6BB manual, but you might note on the picture linked from below linked webpage, there should be a model # silkscreened on the board between the slots. http://www.soyogroup.com/support/proddesc.php?pid=71 http://www.soyogroup.com/images/prod...00x600/6bb.jpg As said the motherboard has AT and ATX power plug options; it has two onboard IDE controllers, floppy, etc; it has 3 PCI slots, 2 ISA slots, AGP (x2 max I think), 2 SDRAM slots and a CPU slot (not socket). It has an apparently non-standard USB connector (pinset), two COM port connectors, LPT port connector, PS/2 mouse connector and large DIN keyboard plug socket. The CPU in it is a 300 MHz Penitum II and the chipset has a green raidator with "Soyo" on it, the second chip of the chipset also has a label saying "Soyo". Hope I can fix this bugger. If it is the board you might see if the local mom-n-pop computer shop has anything to replace it, as parts this old are being thrown away these days. |
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