Power problem

Hi,

I am running W98 on a 3 year old machine. Recently when I switch the power
on and the wall and try to start the machine, nothing happens (no lights
go on, nothing). The only way I seem to be able to get it going is by
switching the power off and on at the wall, and trying the PC. This can
become quite tedious.

Does anyone know what might be causing this? I am thinking it might be some
kind of power supply problem.

Cheers,

Von

Von Heler wrote:

I am running W98 on a 3 year old machine. Recently when I switch the power
on and the wall and try to start the machine, nothing happens (no lights
go on, nothing). The only way I seem to be able to get it going is by
switching the power off and on at the wall, and trying the PC. This can
become quite tedious.

Does anyone know what might be causing this? I am thinking it might be some
kind of power supply problem.

When your system fails to start, what is the voltage on pin 9? If it is
less than 4.75v, either a) the logic on your motherboard is shorting
b) your +5vsb is under powered, or c) your PS is bad. It is
most likely a combination of b) and c).

If your +5vsb is OK, measure pin 14 of the PS/MB connector. If it is 0.8v
(and the +5vsb is OK), the power supply should be on. If pin 14 is 0.8v,
the +5vsb is OK, and the PS is OFF, the PS is bad. If pin 14 is 2.0v, the
power supply is being told to stay OFF by the MB. If depressing the front
panel ON/OFF switch does NOT lower pin 14 to 0.8v (and the +5vsb is OK),
then the problem is NOT the power supply, but rather MB related.