Re: CPU or Motherboard

Johnny B Good wrote:

If the PSU is by 'Bestec', connect it to the mains without any load
(safest thing to do) and measure the VSB line (purple wire). It's
_supposed_ to be 5 volt +/- half a volt maximum variation. I bet you'll
find it's higher than 6 volt!


It is a 'Bestec'


The reading I got, btw, was 6.33 volts. Not enough to immediately blow
the standby part of the chip, but enough to slowly "Cook it's Goose".
:-(


I have tested this with a good quality DMM with the following results:

No load at start-up 6.47v

After 15mins 6.75v


I'm off to buy a new motherboard & PSU

Thanks to all for the helpful tips and advise

M
.

Relevant Pages

  • Re: Fixed : PTK169 B+ still high
    ... >> I dont have repair manual. ... >> made no effect on standby and only drops to 159 volt in run. ... >> adjustment? ...
    (sci.electronics.repair)
  • Fixed : PTK169 B+ still high
    ... The 15 volt rectifier, D4118, was the problem. ... > I dont have repair manual. ... > made no effect on standby and only drops to 159 volt in run. ...
    (sci.electronics.repair)
Loading