Re: MoBo or Processor ?
- From: nospam@xxxxxxxxxx (Paul)
- Date: Thu, 02 Mar 2006 06:19:35 GMT
In article <JaOdnakbbYjq6JvZRVn-tw@xxxxxxxxxxx>, Dave
<Tech001902949@xxxxxxxxxxxxxx> wrote:
Chris Hill wrote:
On Wed, 01 Mar 2006 21:59:42 -0500, DaveYep tried, NO JOY! Looking at a faulty MoBo right?
<Tech001902949@xxxxxxxxxxxxxx> wrote:
Peasant wrote:
Dave wrote:Stripped the system entirely, placed the MoBo on a Phone book, installed
A new system I am building and having problems with gives NO P.O.S.T.Make sure mb isn't shorting. Try to power it up on a workbench outside
beeps at startup even if there is no RAM on the board, how do I
ascertain if it is the processor or the Motherboard that is the problem?
My thinking is that the system "should" provide P.O.S.T. beeps
regardless of the processor working or not working as it is controlled
by the MoBo and not the processor.
PSU has been tested as good and the MoBo IS getting power
Your thoughts on this please?!
of the case. I had this happen once and it was because I had shorted the
mb.
processor and processor fan ONLY with NO RAM, no cards, no drives.
Plugged in the main power connector to the board and the 2x2 connector
for the processor and then shorted across the power pins and SAME
result, powers up but NO POST beeps or anything else!!!
Known good name-brand power supply of sufficient wattage? If not you
know what to do.
OK. Replace the motherboard.
I'd probably take a meter, and check the voltages on the main
ATX power connector. A $20-$30 multimeter can measure the voltages
for you. You have fans spinning, which means there is probably
+12V. If the disk drive spins, you probably have +5V as well.
But the 3.3V, I don't know of an observable way to prove it is
present. By using the multimeter, and probing the tiny bit of metal
that you can see while the ATX main power cable is plugged in, you
should be able to determine if the power supply is delivering all
voltages. (For a ground, if this is a cardboard test, you could
plug your ground lead into one of the two black wires on a spare
Molex disk drive connector. If the motherboard is mounted inside
the computer case, you can use an alligator clip and clip onto
a screw on one of the I/O connectors on the back of the computer
case.)
Processors should be DOA less often than motherboards, so the
motherboard is the thing to replace. At work, I don't think I ever
had a dead processor out of the box. We always used anti-static
precautions, which may help a bit compared to home installs.
There are occasional reports of dead processors, or flaky processors.
It does happen. But a motherboard has more things on it that can
go wrong, and the motherboard manufacturers probably don't do
burn-in on the boards. After all, one of them makes 5 million
motherboards per month, and it would take a massive burn-in
chamber to handle the volume of boards. How they test all
those motherboards boggles the mind.
Paul
.
- References:
- Re: MoBo or Processor ?
- From: Chris Hill
- Re: MoBo or Processor ?
- From: Dave
- Re: MoBo or Processor ?
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