Re: Philips flat-panel dead. Replaced PSU caps and still squealing





Absolutely NOT factory. For quick testing I tapped it onto the board. Now that more than one person has mentioned it I suppose I'll take care of it. I was actually planning on putting a jack on the case and a removable power cable but couldn't find any small figure-8 jacks lying around and didn't want the bulk of a 3-pin IEC connector on there. It's only an issue if you were to move it around but, I knew it wasn't *good* at the time, just wanted to get it tested. I nicely soldered...

Re: Philips flat-panel dead. Replaced PSU caps and still squealing



Great! Thanks, found it. However, there is an interesting mark on the board in the vicinity of D668. Almost looks like D631 shorted out but nothing aside from the dark brown marks (almost burned or singed, but not DEEP brown/black) in it's vicinity indicates a problem. Obviously that )D668) still could be the issue but, I want your guys' opinion before I up and buy new parts that may be totally unrelated to the problem.

As for the inline pics. I know some guys hate them, others don't...

Re: Philips flat-panel dead. Replaced PSU caps and still squealing

Full board:


PSU area 1:


PSU area 2:



None of the zener dioades appear to be shorted out so it may be bad(?). Would it be easiest to replace all of them or, is there s specific one that is usually the culprit? I didn't see a D668 diode, there are several other diodes (D607, D608, D605, D606, D610) in the vascinity of the PSU. Now, would it likely be centerilized around that PSU section or, should I be looking all over the whole board for the...

Re: Philips flat-panel dead. Replaced PSU caps and still squealing



Yep, Power and Tuner are on the same board. I looked up the part number for the board but didn't find any good sources and heck, I would rather fix this one up than buy a new (or new, 'used' board) anyway. This way I know that the caps will be good caps (decent brand anyway) and that it won't be damaged in transit.

I'll post pictures tomorrow. Apparently the camera on my phone is broken (plastic lens cover/protector) is broken so there are blurry spots on the pictures. You all would...

Long time lurker, first time poster. Not sure why I didn't already have an account here before today though...hmm.

Well, I've recapped some gear in my time and when I came to this TV, I did nothing less. Replaced the caps directly around the power source (the common problem, 200v caps)and the problem still presists. When the TV is plugged in, there is a high pitched whine/squeal that decreases in pitch over a short time.

Nothing seems to have changed after replacing the caps so it leads me to wonder what the next place to deal with is.

TV model is:...