NO PICTURE TV NOT TURNING ON ----RED LED IN FRONT BLINKING ABOUT SEVEN TIMES REPEATEDLY

How many times of red led blinking?

just inform the supplier it was covered with warranty so you can availed it.

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.

Check the link below to find the parts that are causing the LED to blink 7 times and replace them to fix the plasma.
http://www.fixya.com/support/t5048641-easy_replace_capacitors

if you have the circuit diagram of your tv,check the horizontal polarisation IC closer to the line transformer and replace it.If it doesn't work,send the question again.

sounds like your tv in shut down mode why lamp needs 2 be replaced nominal cost 120 200$

Needs new lamp or the fan is out.

Sounds like a scan problem if yu suspect the y-sus i suggs\est changing the drivers to

Most likley bad tube have replaced alot of them on this make and model.

it is a bad fan. it also could be a power supply. Quite often the real problem is dirt clogging up the fan(s) to the point that they need to be replaced. Operation of the set in a dirty environment is not a good idea