My lg 50PS50 plasma tv won't turn on. It clicks multiple times and repeats. The indicator light turns red. It does this after unplugging all devices, unplugging the tv.

These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
http://electro-medical.blogspot.com/
If blinks continue without any pause, the main board is faulty.

Procedure is

Step 1: Turn on the device (VCR, DVD, TV, Satellite receiver etc.) you wish to program.
Step 2: Press and hold the "CODE SEARCH" or "SETUP" button on the remote until the indicator light turns on, then release.
Step 3: Press and release the button for the device you are programming (VCR, DVD, TV etc.). For AUX, press AUX button, then the device button you are assigning to AUX. The indicator light will blink then remain lit.
Step 4: Enter the three-digit or four-digit code (depending on your GE remote model) for your device using the number buttons. After your code is entered the indicator light will turn off.
Step 5: Aim the remote at the device you want to control and press the POWER button. Your device should turn off. If your equipment does not respond to the first code listed in the documentation, repeat steps with the next code. If the device responds correctly to other functions like Volume or Program up/down, no further programming is required.
If you can't find a working code for your device or your brand is not listed try the "Code Search" method described below.

The CODE SEARCH function

Step 1: Turn on the equipment you wish to program.
Step 2: Press and hold "CODE SEARCH" or "SETUP" until the light turns on, then release.
Step 3: Press and release the button for the device you are programming (VCR, DVD, TV etc.). The indicator light will blink once, then remain lit. For AUX, press AUX then the device button you are assigning to AUX.
Step 4: Press and release the "POWER" button until your device turns off. Wait at least two seconds between each time you press "POWER". Note that you may have to press "POWER" up to 250 times!
Step 5: When your device turns off press the "ENTER" or "SAVE" button. The indicator light will turn off. Check other functions to see if your code is correct.

Your TV main board is damaged and you need a new one. You can order one on ebay and fix it yourself. Make sure you have the TV model/serial number on the back label of the TV to have the right part when ordering.

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.

Ur power board need it replaced,LED indicator light not sustaning power.

Unplug,replug should be back to normal,not than U must change the power supply.

turn tv on picture comes up 2to3 seconds later tv blacks out then stand by red light flashes 4 times in a row repeatedly..can not turn on or off when stand by light starts flashing but before tv blacks out you can turn tv on and off repeatedly and picture and sound work.You have to unplug power cord for 30 seconds after stand by light comes on to get tv to turn on.

44 inch lg dlp hdtv no picture or sound press power button standby light turns yellow and then back to red

i think your bulb is shot must be replaced