Philips 42PF9631D/37 Plasma dead

[CraigR]

Hello all! I have a Philips 42PF9631D/37 Plasma dead. I opened it up and found only 1 cap that looked visually bad and replaced it with a good low ESR cap (see pic) Now when I plug it in I hear the click and the light on front is green then I go to turn it on and it turns to red and flashed 7 times over and over again. I looked on the forum before posting this and found a similar problem however my power board does not look the same as what he had. I have a picture of the same board I have. Not sure if I need to start pulling caps and checking or what.

[CraigR]

Re: Philips 42PF9631D/37 Plasma dead

Well I have it running now, I replaced the capacitors around the big one I seen bad and it seems to be working now however it looks like a light "snow" in the picture could this be more bad caps?

[CraigR]

Re: Philips 42PF9631D/37 Plasma dead

I adjusted all the picture setting and got a little better but still there. I ran HDMI from my computer to it and put a blue screen on and as you can see from the picture on the right the little white dots. The wavy lines on the left are not actually there must be my camera making them.

[tom66]

Re: Philips 42PF9631D/37 Plasma dead

You need to locate the VSET voltage on the power supply and drop it by around 10 to 20V.

[CraigR]

Re: Philips 42PF9631D/37 Plasma dead

Ok Tom, I found Vset on a connector and it reads 197.3v and I found a POT marked Vset is this where to adjust? also seems wicked high if it's to only be 10-20

[tom66]

Re: Philips 42PF9631D/37 Plasma dead

Vset is different from Vs. Is there a pin marked Vset on the connections going off to the X- and Y-main boards (the right and left boards respectively.)

[CraigR]

Re: Philips 42PF9631D/37 Plasma dead

Just made an edit at same time as your post. please re read the above.

[tom66]

Re: Philips 42PF9631D/37 Plasma dead

Vset needs to be dropped by about 10 to 20V. Not around 10 to 20V. Sorry for the misunderstanding. Vset is normally around the 200V range, that is absolutely fine.

[CraigR]

Re: Philips 42PF9631D/37 Plasma dead

Took it down to 173v (low as the POT goes) and same thing.

[tom66]

Re: Philips 42PF9631D/37 Plasma dead

OK, may need to adjust Yrr and Yfr on Y-main board... can you supply a photo of that board?

[CraigR]

Re: Philips 42PF9631D/37 Plasma dead

Kind of new at plasma TV's so to save time can you point it out on this pic Tom?

[tom66]

Re: Philips 42PF9631D/37 Plasma dead

Hard to tell with all the metal framework in place, but I think this is the y-main.

[CraigR]

Re: Philips 42PF9631D/37 Plasma dead

Looks like a major pain to get the supports out of the way.

[CraigR]

Re: Philips 42PF9631D/37 Plasma dead

Ok looks like half the tv needs to come apart so before I do that are you pretty sure this will fix it? with all the stuff coming off to get at it I don't think I will be able to power it on after I get down to it.

[tom66]

Re: Philips 42PF9631D/37 Plasma dead

Never sure with sparklies, unfortunately. They cannot always be fixed.
It would need to be powered on while you adjust it to observe the image.

[CraigR]

Re: Philips 42PF9631D/37 Plasma dead

Ok, tore it down and here are 2 actual pictures and a better one I got off the web but it's the right board.

[tom66]

Re: Philips 42PF9631D/37 Plasma dead

You would need to try adjusting the points marked Y-RR and Y-FR on the board. First try Y-FR. If you go too far the sparklies will get worse so when you see this, reverse direction. If that fails, try Y-RR.

[CraigR]

Re: Philips 42PF9631D/37 Plasma dead

WTF??? Got a light and looked real good at board and seen 3 more caps bulged so thought great had to be the problem so took board out and replaced caps and put back in then went to fire up and back to the same problem in my first post. Clicks when plugged in green light then turn on and light goes to red and blinks 7 times over and over. I looked everything over and all wires back on and looks good.

[CraigR]

Re: Philips 42PF9631D/37 Plasma dead

UPDATE: ok, pulled pc and went through some caps again and found another bad one so replaced it and back up again however adjusting the Y-FR and the Y-RR only made it worse never any better. sparkles look green to me.

[CraigR]

Re: Philips 42PF9631D/37 Plasma dead

Well today I went to mess with it again and back to the 7 flashes so could that mean it's in something other that the power board?