Immediate Power Down problem
I am building a Digital Video Workstation.
Basic parameters:
TYAN S2676 motherboard with a Thermaltake W0049 PSU with dual Xeon 3.6 GHz processor, 4 GB (ECC) RAM, 4 SCSI and 2 SATA drives. (SCSI hard drives or controller are not installed yet, only part of the liquid cooling chain). For cooling I use a Koolance Exos-2 system. Case is a Temjin TJ05.
I have not been able to configure anything yet beyond the BIOS.
When I start the system via the power button on the front of my chassis, it apprently runs all right until I restart the machine (I was able to flash the BIOS to the latest version without problems). Then it only powers up for a second, then it shuts itself down (no POST is made yet, just the the fans start to spin) - and this happens over and over again but I have to reset the power button (keep it held 3-4 secs) every time before I can power on.
I wait for an hour or so then reset the front Power button again and boom: the system starts without the problem - I can enter the BIOS, check everything and choose SAVE AND EXIT.... The computer shuts down. When I try to restart, the symptoms start again. If I wait 1-2 hours - perfect startup - otherwise - no luck. This has been a consistent problem and I can't find a solution.
I had my PSU replaced (this is a very powerful 680W unit) - same symptoms. When I tested the PSU by disconnecting the mainboard cable and shorting the green/black wires, the liquid cooling system and the fans were running OK. Played with the power and reset cables, switched them to every possible variation - no luck. I have direct temperature reading from the CPUs - they both run at about 25 C.
But when the problem occurs, the startup process never reaches to the point of POSTing.
Obviously, I can't proceed with installing any further components until this problem is resolved.
Before I send my motherboard back for a replacement - any idea?
Thanks
Andalex
Basic parameters:
TYAN S2676 motherboard with a Thermaltake W0049 PSU with dual Xeon 3.6 GHz processor, 4 GB (ECC) RAM, 4 SCSI and 2 SATA drives. (SCSI hard drives or controller are not installed yet, only part of the liquid cooling chain). For cooling I use a Koolance Exos-2 system. Case is a Temjin TJ05.
I have not been able to configure anything yet beyond the BIOS.
When I start the system via the power button on the front of my chassis, it apprently runs all right until I restart the machine (I was able to flash the BIOS to the latest version without problems). Then it only powers up for a second, then it shuts itself down (no POST is made yet, just the the fans start to spin) - and this happens over and over again but I have to reset the power button (keep it held 3-4 secs) every time before I can power on.
I wait for an hour or so then reset the front Power button again and boom: the system starts without the problem - I can enter the BIOS, check everything and choose SAVE AND EXIT.... The computer shuts down. When I try to restart, the symptoms start again. If I wait 1-2 hours - perfect startup - otherwise - no luck. This has been a consistent problem and I can't find a solution.
I had my PSU replaced (this is a very powerful 680W unit) - same symptoms. When I tested the PSU by disconnecting the mainboard cable and shorting the green/black wires, the liquid cooling system and the fans were running OK. Played with the power and reset cables, switched them to every possible variation - no luck. I have direct temperature reading from the CPUs - they both run at about 25 C.
But when the problem occurs, the startup process never reaches to the point of POSTing.
Obviously, I can't proceed with installing any further components until this problem is resolved.
Before I send my motherboard back for a replacement - any idea?
Thanks
Andalex
0
Comments
something might be shorting it out
also try setting the bios to defult and runing it that way
might be a setting that it does not like
might try clearing the cemos also
just some ideas that poped into my brain
good luck