James,
Look for a 100uf 200 volt lytic near the relay and replace it.
Also look for a 300k and 330 k resistor pair in series near the middle of
the board.
You could also be facing a bad flyback.

Good Luck,
Bill Jr


"James Sweet" wrote in message
news:_VgZb.19528$4o.39840@attbi_s52...

"Jason D." wrote in message
...
On Fri, 20 Feb 2004 03:07:23 GMT, "James Sweet"
wrote:

Still have this Philips 41JP20 awaiting my attention, replaced the
BUW12A
and HOT but the power supply still doesn't fire up, just makes a faint
buzz
then the relay clicks again and the orange and red LED's come on too.
Standby voltage is there, not even a peep out of the other outputs. Any
insight as to why the power supply isn't starting up? I thought I
checked
all the semi's but maybe I missed something.



What about resistors, caps? This can stop the whole show.
Also philips used neon blue caps, they go bad.

I'm not famillar with this philips chassis, what kind of this SMPS
topology? One for standby only, one for main run power? Or same SMPS
for both standby & run? Or uses regular standby transformer to power
micro in turn trips the SMPS to run when commanded to turn on?

Cheers,

Wizard

I thought I checked all the lytics for ESR, replaced a few that were
questionable. It uses a normal 60 hz transformer to provide the standby
voltage.