I have a LG rear protection tv. I believe 52sz8d-is. When I plug it in the red power led light comes on and the bulb led flashes green but it won't Turn on

Your lamp most likely failed. You can get a new bulb for it for less than $100. RU52SZ51D Bulb LG Genuine High Quality Original Projector Lamps now...

Try changing the input device to something you are sure, works such as a DVD player.

Switch off TV manually, switch off power, remove plug and retry after 48 hours.

If problem persists, please refer it to a qualified service technician.

Light flash is trouble code, unplug from wall the longer the better, and then hold power button when pluging back in to try to reset.

The main power supply is failing or it is shutting down because of a fault on the output side of it and it is trying to protect itself from overload which can cause a fire. Contact Zenith customer service and describe the problem, particularly the flashing LED which may be giving you an error code.

The flashing red light means that the tv is in protection mode. The tv will not turn on when the red LED is flashing. The most common problem for Hitachi are the convergence output ic's. But they useually do not cause the LED to flash. This tv does also have a problem with Q777 going bad. This will cause the LED to flash. If Q777 is bad the horizontal circuit needs to be modified. This must be done by a tech.

my 55613 tv wont turn on just blinking green light

Flashing led..in protect mode..internal shorted component.

I have had this same problem twice in the past 3 months. So far both times I've been able to get it back after a week or two. I'm not sure what works, but unplugging and detaching the antenna and cable and waiting a few days seems to be the key. In both instances, I unplugged it for a few days then plugged it in for a few days and repeated the processes until I eventually got the steady red led. Both times prior to the red led the led would flash red then green and make a clickiing noise for several hours before I was able to get it working again.

your bulb is going out.

I had the same exact problem.
I removed the bulb and cleaned it. There is a small screen at the top of the bulb and it was covered with dust. Once it was cleaned I replaced the bulb and it solved the problem.
Thanks to those who posted the solutions