First of all thank you for taking time to read this post. Hopefully someone is able to help me out as the issue I face is driving me mad.
For a while I have experienced crashes requiring me to turn off the PSU entirely in order to boot again. Three days ago during one of these crashes the computer will no longer boot: fans started spinning but neither POST beep codes nor video signal appeared.
I thus stripped everything but CPUs (dual Xeon) and memory (4*512Mb) which did not change anything. CMOS was then cleared, first with jumper then by removing battery, but without effect.
I removed all memory modules and booted which did give error beep code though! Suspecting a bad memory module I subsequently tried all of the 4 modules one at a time but in vain.
Assuming its not a bad memory module (unless all 4 was fried as the same time) I checked the PSU. All connectors seem to deliver as they should, although they all were above specification (but within 5%) and was tested while short circuiting pin 15 and 16.
At this point I thus suspect either (at least) one defect CPU or perhaps the motherboard itself. My next step will thus be to try and boot with a single CPU and try both of them but as this is somewhat tedious perhaps I may have overlooked something more obvious?
Its a rather old rig: Intel SE7505VB2 with dual Xeon 3Ghz and 4*512 Mb Kingston ECC memory.
Rgds,
Thomas
For a while I have experienced crashes requiring me to turn off the PSU entirely in order to boot again. Three days ago during one of these crashes the computer will no longer boot: fans started spinning but neither POST beep codes nor video signal appeared.
I thus stripped everything but CPUs (dual Xeon) and memory (4*512Mb) which did not change anything. CMOS was then cleared, first with jumper then by removing battery, but without effect.
I removed all memory modules and booted which did give error beep code though! Suspecting a bad memory module I subsequently tried all of the 4 modules one at a time but in vain.
Assuming its not a bad memory module (unless all 4 was fried as the same time) I checked the PSU. All connectors seem to deliver as they should, although they all were above specification (but within 5%) and was tested while short circuiting pin 15 and 16.
At this point I thus suspect either (at least) one defect CPU or perhaps the motherboard itself. My next step will thus be to try and boot with a single CPU and try both of them but as this is somewhat tedious perhaps I may have overlooked something more obvious?
Its a rather old rig: Intel SE7505VB2 with dual Xeon 3Ghz and 4*512 Mb Kingston ECC memory.
Rgds,
Thomas