Re: Philips LCD 42PFL5432D/37 - Bad PSU

I put the parts on the other board, which was dead. It makes the rd lite come on, then if you push the red lite button on front of tv, the green on comes on. But no screen light. The "chirping is not on that board, though. What I guess I have to do is recheck ALL the diodes, transistors, again. Bed time now. Ill pick you all up tomorrow. THANKS so far.
ROSS

Re: Philips LCD 42PFL5432D/37 - Bad PSU

Oh yes, I replaced zd904 and 902also c958 with a 47uF @ 50v
Got me bugged!!!! Have been swapping parts back and forth between TWO duplicate PSU's.

Re: Magnavox LCD 47MF437B/37 Bad PSU

[url]http://www.wadictatv.com/Magnavox%20Pow%20Sup%20715T2454-2.jpg[/url] = Open up in separate window and compare:

The magnavox 47MF437B/37 uses the same power supply as the above Philips unit, or, they share the same TRANSFORMER #80TL37T912 LS. Which is "chirping." Here is my problem. And here is my question.
= Should I salvage a duplicate transformer off another unit of same value and replace this one that is chirping? Seems to be the last resort, short of buying another PSU at $75.00 +++

MAGNAVOX...

Re: HP PL4260N plasma no picture, no sound, no power

Working with an HP PL4260N.
I have NO nothing! No power, no little red or blue light?
Set is stone cold dead.
AC runs into the power supply and stops. No little voltages: 5v, 12v, 9v.
Nothing.
(I use the diode test setting to hear for BEEPS = shorts.
Checked the Y-Sus buffer and ground to little pins, NO beeps. Seems all the little IC squares are good?
Y-Sus board - replace 1 blown fuse. Still nothing.
Checked the 5 little square IRFP 4232's and no shorts - no beeps. All...