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f825_633[_2_]

wrote:
I'm working on a Dell W3000. The power supply has an issue.

The power supply powers on and right as the back lights come on the green
led goes out and then comes back on.
It does this over and over again. It stays on about 5-6 seconds and then
powers off and then powers back on.
I checked all voltages and they seem to be within spec. except the 24v
lines are about 20volts.

As i check the voltages, they do not seem to fuctuate with the on and off of
the led on front.

IOW, the PS goes on then right as the back light starts to comes on the
power supply shuts down. Even though the output voltages stay the same.
If the PS shuts off shouldn't the voltages go down?

It also has a 8 pin dip with PS2008 (0332) that drives a K2674 transistor
and I can't find a replacement anywhere! I not 100% sure its bad yet.

Any Ideas on this would be great!

Have a dig about for some dead capacitors with an ESR meter,
around to 10uf mark.