The unit is 18 months old and has worked perectly until now. The system powers itself down leaving the power light blinking slowly. After a re-cycle of the power switch it (usually) comes back on. It can remain on for anything between 5 minutes to 20 mins. before repeating the power down.
Is this possibly due to power fluctuation? It only seems to happen at nighttime. Are Panasonic power supplies super-sensitive?? All other systems on the same power circuit continue to work flawlessly.
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it is not a good sign. If the tv screen is dark (no picture) and no sound but the standby red light is continuously blinking then it could mean the power supply board in tv is faulty.
Usually a few burnt out capacitors on the board but hard to replace yourself unless you are experienced in this sort of work. From the model it appears a reasonably recent unit and you may want to get it checked out by a repairer at least to get an estimate of the cost.
See this site to get some idea of the part costs. PANASONIC TELEVISION TH42PA50A Parts
HI, There is a fuse located inside the power supply unit. I would advise to check this fuse asap. The fuse may have burned out, due to a surge of some sort. If the fuse is ok, this will confirm that the power supply itself has failed. Have it replace asap.
Okay, This is not i huge issue plasma do take some time 15 secounds would be kinda noraml there. I would say leave it alone until you find another mahor issue as 15 sec for a plasma on total cool down is not a issue as of yet.
in protective mode the tv does not turn on and light is blinking, typically we must proceed by elimination as some faulty sections are preventing the tv to switch on. unplug the output power connectors from the power supply until the latter stop clicking. if it is still clicking after every of the output rail have been disconnected, then the power supply itself is faulty.