Same issue with - Panasonic TH-50PX70A , power UP with red standby, then power ON by remote - only Gives GREEN led blinking 35-40 times, followed by solid green led with no no picture no sound.
>> Solution; unplug Plasma from AC 10-15min, then plug in & power on to Red standby led,, At this point - Power ON tv while holding down both -Volume Down and F (function Select) buttons (front panel door) at the same time turns picture ON,all ok.
SOURCE: 42" Toshiba Plasma TV no picture or sound
My experience with 42" plasma tv's with no picture or sound was a missing power supply voltage. On the power supply board check voltages on the plug. The voltages should be marked on the board,
SOURCE: panasonic plasma vieta
I just bought a Panasonic TH-42PZ800U and had the same problem. 10
blinks and the TV would not start. Then after some trial and error I
solved the problem!
Here is my (apparent) observation and solution:
I had only one input into the TV, which was my HTPC connected via a
DVI-to-HDMI cable plugged into the Panny's HDMI 1 slot. *IF* the HTPC
was already on, then the Panny would have the blink of death. *BUT* if
the HTPC was off, the Panny booted fine (assuming I cleared the blink
of death first by powering off the HTPC, unplugging the TV, and
replugging the TV back in with the HTPC still off).
My solution was to move the HDMI cable from slot 1 to slot 3. After
making this one change, everything worked as it should. No more 10
blinks of death. I could even leave the HTPC on and turn on the TV
last, and it still worked. Tried this 10 times, worked 10 times.
I don't know if this will solve other people's problems, but I hope it
at least provides some clues. I wonder if this is a fundamental circuit
design flaw on the part of Panasonic, rather than a "bad batch of
parts" problem.
Thoughts? Feedback? Send to gcpien at hotmail dotcom
SOURCE: 42 inch LG Plasma TV - Lost picture
try connecting tv to cable direct also try unplugging both converter and tv for wile like 5 mins plug both back in see if tv and converter sync
SOURCE: Panasonic plasma
If you open the back,look at the can shaped items.If any of them have the tops bulged out,they need to be replaced.This should solve your picture problem,unless there is something else wrong.What is happening,is they are heating up,and the picture goes out.I bet the longer you have the TV off,the longer it stays on?Hope this helps.Thank You very much! Tyler
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