Here's a problem...

kleefarr · 13-07-2007 8:42pm #1

For a while now my brother in laws PC has been POSTing over and over for
about five minutes and then finally boots with every thing running fine.

As I was down at his today I decided to check a couple of things.
First I checked the Motherboard CMOS battery. It's fine reading 3.16v
I also checked other voltages and they are as follows..

Purple - 5.04
Green - 0.04 starts on checking
Orange - OFF 0.26v / ON 3.34v
Red - OFF 0v / ON 4.97v
Yellow - OFF 0.03v / ON 12.18v

Then connected Green/ Black and checked readings of above. ALL READINGS ARE THE SAME VOLTAGE AS ABOVE. Which I understand to be good.

Grey/ Black 2.95v
Grey/Black Current (Setting 200ma) reads 6.3

The Green voltage doesn't look good from what I understand, but I am only
just getting into the voltage section of PCs.

There is a clicking sound coming from the CPU area, this kept happening
while it was repeating the POST but stopped once system was up and running ok.

I gave everything a good clear out while I was in there, loads of dust.
Having just put everything back together it is now NOT POSTING, at least it
doesn't sound like it, but I'm not to sure as there is no video now.
Everything is connected properly, have reseated memory and video card so I'm thinking that what ever it was was just hanging on and has now completely been screwed by me doing the tests and the cleaning. (Haven't reseated the CPU yet though. worth a try?)

It can either be one of two things I would have thought.
1. Motherboard
2. CPU

Any input gratefully received.

P.S. Regarding video, I know it's not the monitor because that has been checked using a lappy.