My lg plasma tv when we turn it on blinks green 2 times then goes back to red

SOURCE: LG 42 plasma power problem

needs power supply Part number 6709900023A
it is a 171 dollar part, you should be able to order through LG,

SOURCE: LG 37LF65 LCD TV BLINKS 3 GREEN THEN 1 RED THEN TURNS OFF.

Here's a link to the service manual for a slightly larger LG LCD TV. Perhaps it may be of some help? The troubleshooting section appears to be the same for many models of LG TVs...

http://www.observations.biz/MANUALS/LG_LCDTV/42LF66.pdf

SOURCE: 42" LG 42LC2D HDTV Will not turn on

Hi, sounds like a power supply problem, most likely needs capacitors replaced, costs about £5 to do it yourself, and a fortune in the repair shop, easy enough if your handy or know someone who is,its worth a try,it'll be going in the bin anyway, cam

SOURCE: I have an LG plasma TV, model: 50PC1DRA. We had a

Defective power board. Maybe best to call local service man.

SOURCE: My LG Plasma 42PC3D turns on and off repeatedly. I

Your plasma TV has a power supply 6709900019A. These power supplies failed due to defective capacitors. See the picture below and check the capacitors mark with the red lines. There are 10 capacitors that should be replaced even if they do not show signs of bulging/swelling on top.
The value of the capacitors is 3300uF/10V but you can use 25 volts as long as they fit in the space provided by design.