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Philips 42PF9630A/37 Repair in progress - Need Advice

Brenton07
04-29-2011, 07:22 PM
I know this has been discussed at length in the forums, but I couldn't find an open one to begin my comments and questions. If there is one, by all means direct me :-)

I recently purchased a knowingly "broken" 42PF9630A/37 Philips ambilight plasma on the cheap. It had the classic 7 blinking lights of death on the front, which led me to believe it was hopefully a capacitor issue. I disassembled the back panel, and to my surprise, the capacitors that have traditionally been the issue look just fine, no bulging in the slightest that I can tell.

I noticed that there were 3 blinking LEDs on the PSB itself, near the upper left corner on a card that is soldered vertically into the board. Searching forums, no one has any really useful advice on what that could be, other than one suggestion that sometimes indicates a bad vscan on certain models (never found one that mentioned mine specifically and the service manual doesn't speak of it).

I tried unplugging one component at a time, starting with the buffer which was suggested in several threads. I then unplugged what the service manual refers to as the PDP inverter on the right side of the screen (left if looking at the rear). When I do that, the TV powers on normally, I can turn it on and off, power ambilight on and off etc, and no blinking lights. Additionally, the green led on the PSB I was referring to stays lit green.

Any thoughts on what it could be? I can't get into the service menu due to the screen not working, and the error code says the blinking lights are a 8V6 supply issue, but I find it odd I can get the error to disappear if I unplug one of the other circuit boards (unless the unit just isn't drawing enough power then to spark the automatic protection and then the error....).

If I have to I'll just replace the capacitors, but i don't want to do that if I think it's a bad processor board or something else.

Thanks all!

Loves2Watch
04-29-2011, 07:25 PM
Potentially a power supply issue among other things. I would recommend starting there first.

Brenton07
04-29-2011, 07:30 PM
Yeah, I just finished taking the power supply board out, I'm going to try taking it to a mom and pop electronics store since I'm not sure if the capacitor is bad and don't want to risk electrocution. I'm going to have them replace the two capacitors that tend to be problematic and if that doesn't work may have to take the whole set in :-(

Loves2Watch
04-29-2011, 07:31 PM
Yeah, I just finished taking the power supply board out, I'm going to try taking it to a mom and pop electronics store since I'm not sure if the capacitor is bad and don't want to risk electrocution. I'm going to have them replace the two capacitors that tend to be problematic and if that doesn't work may have to take the whole set in :-(

Good idea.

xavian
06-02-2011, 05:48 PM
Did you find a solution?