Question about Panasonic TH-42PHD8UK 42 in. Plasma Television
When TV has been on for a while picture becomes very bad with fuzzy horizontal lines. Picture great when TV is cold (only been on couple of hours) but gradually gets worse as it warms up. Problem not with input as bad picture with inbuilt digital tv, sky tv and wii.
SOURCE: horizontal lines on start up
I get the exact same issue, exepct now it never clears up. I have tried to find someone to come look at it but no one does "house calls" anymore and everyone I call makes it sound so easy to just toss this beast in a car and bring it in. One of the repair techs said the issue sounded like the board had been zapped by a lighting surge...but of course there was no way to be sure unless I brought the set in.
Posted on Apr 03, 2007
Get the professional, although this won't be an expensive fix... You likely have one or more caps in the vertical circuit that are going bad... A cap acts like a battery in a circuit taking on voltage and releasing it at an even rate. When they go bad their ESR (equivilent series resistance) rises and the cap takes longer to reach it's op temp and work properly...
A tech with an ESR meter will easily find and repair this one... But you'll need to take it in to save the pickup/delivery charges.
Posted on Dec 01, 2007
SOURCE: No picture or sound
Make sure that there is actualy power going to the AC power source where the TV is plugged in. You can re-set the TV by disconnecting the power for about 10 seconds and then connecting it back again. If the set still does not start it will require service.
If the set is dead it is most likely the main power supply board that failed. The service tech would replace the power supply and also investigate to find the cause of the failure. Sometimes another board could have a failure and cause the power supply to be damaged.
If the set will not start up, it will require shop service. You can call Panasonic tech support to find out the authorised service rep for your area. Check to see if the set is still under warranty. If not, it will be expensive to service.
Posted on Jan 17, 2009
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