HLN4365WX/XAA Trys to come on but turns back off and trys again then goes to two flashing green and one flashing red light. No sound or picture. Had a problem earlier with no picture with sound but could unplug tv and it would come back on when plugged back in and turned back on. Thanks

SOURCE: Samsung HLS5087WX/XAA goes to red/green

does the power light blink in any regular way?

it may help us to decode what the problem is..

SOURCE: no picture on samsung hlp5063wx/xaa

to test this set
unpug the 4 pin conector labeld + and _ 20v on the cg convergence module
if set turns on, the problem is that modual
repaie
replace bolth convergence IC'c stk392-040
also check all 3.9 ohm resistors and both pico fuses.
regards,
daniel.

SOURCE: PICTURE IS OUT WHEN I TURN THE TV ON THE RED & GREEN LIGHTS FALSH

Most Likely you need to replace your bulb. On Page 99 of the owners manuel is the LED indications chart. (you can download the manuel here) You are probably having indication number 3, which means the bulb is done. You can find new bulbs on Amazon and e-bay. I recommend you buy the Toshiba brand bulb and not a knock-off, I have heard that they may not last as long and do not look as good.

SOURCE: TV won't stay on. Green & Red light timer-lamp (Green) stand by/temp (red) flash.

Most likely needs a new lamp. Easily done yourself.

SOURCE: Sony 51 inch model kp-51hw40 Trouble code 8

A 8 blink code usually means there is a High Voltage issue. Replacing the "D" board fixes it most of the time. You could also have a HV Block that has failed. The only way to know for sure is to get a professional out there to check it out. A High Voltage problem is something you do not want to mess with.
Hope this helps,
Skyassoc