Panasonic TV, random shutoffs with a lot of noise

Greetings, I have a 32" Panasonic TV. Model# is CT-27D108 and the chassis number is AP338.

Sometime ago, it developed several lines that would appear in that top quarter of the picture, that would gradually diminish then disappear after awhile.

Now though, it randomly shuts off, then comes back on. Before it shuts off, and as it's about to come back on, you can hear several clicking/ arcing noises - happening in quick succession.

Even though I knew squat about tv repair, I do understand electornics so I took the back off and looked for any blown capacitors, blown fuses, or scorches on the board. There was none. I cleaned out the inside the best I could, then turned it back on - it ran for a bit, then it started happened all over again.

At first it would shut off, then go back on within a minute or so, now it'll power down, stay down 30 mins or so, then power back on - and it's all random. Sometimes it works 8 hours straight, sometimes 8 minutes. It seems more stable in the middle of the night - 1-4am or so, but I'm not sure if that have anything to do with it - looking for any ideas on the cause of this or how I can go about troubleshooting it further, thanks.

Reply to
Jeremy P
Loading thread data ...

On Thu, 15 Feb 2007 01:24:10 -0800, Jeremy P Has Frothed:

Need to find out where the arcing is if that's what you are really hearing. Or get lucky and have someone read your article that has fixed the same problem in the same TV. Oh and watch yourself around that set as there are potentially lethal voltages present even if the set is off and not plugged in. If I were working on the set I would try to get the humidity up in the room and look at the back of the set with the lights out and see if I could spot a corona somewhere that could lead to an arc. I would also check some fundamental voltages from the SMPS to see if they were all within tolerance while waiting for it to develope a fault.

--
Pierre Salinger Memorial Hook, Line & Sinker, June 2004

COOSN-266-06-25794
Reply to
Meat Plow

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.