Blinking blue and red lights will not turn on TV is LG

I had the same issue and it turns out it was very dusty. So I blew through the air vents in the rear and this fixed it ????

[PDF]Download XD1080 User Guide - Replay XD

www.replayxd.com/downloads/.../Replay-XD1080_User_Manual-EN.pd...

Note: The red LED on the rear will blink when the memory card is not inserted .... The Start REC button should always point up or at the 12 o'clock position for a ...

LG TV Blinking - YouTube

? 0:43
https://www.youtube.com/watch?v=Q8JG53DU6Rk
Nov 5, 2015 - Uploaded by Gillet Gaming
My TV suddenly started blinking when I turned it on at 12o'clock. ... I was going to use it when a few ...Missing: p

Diamond - ndxLocOut

www.nuforc.org/webreports/ndxsdiamond.html

11/7/15 18:05, San Diego, CA, Diamond, 5 minutes, Orange Diamond like .... 8/23/15 21:08, Wildwood Crest, NJ, Diamond, 2 minutes, Hovering red light, ... Diamond shaped brilliant white light with red light in eastern sky at 12 o'clock ..... flashing blue yellow the red at times staying solid red or blue seems to get bigger. 2/27/ ...Missing: p

[PDF]Air-Pak 75i SCBA - User Manual - Scott Safety

Hi John,
TV going off in thirty seconds and red light blinking means there is something wrong inside your Tv and it should not be working in this condition and hence is the "going off" happening. The automatic protection inside is switching your tv off. Please consult some local TV tech. There is nothing you can do about it yourself.
Good Luck.

check mother board.

sounds like a faulty main pcb

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 stage 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. Viewing it in "Mosaic" or "Magazine" will make surf easy.
http://electronicshelponline.blogspot.com/
Blinking codes details to many popular brand TVs are given. Surf the site with patience.

The LG web site recommends that the consumer schedule a service technician if the
set fails to turn on... no help on the red light blinking.
The LG service technician will want to know about the blinking lights, though.

Here's your TV User Manual (in English) for $6.99:
http://www.devicemanuals.com/model/LG_47LD520_manual.html
(couldn't find one free)

The LG site has nothing in the way of a users manual (just a 2-page spec sheet), and
no technical support. They list a parts distribution place though, at:

Encompass Parts Distribution 1655 Lakes Parkway
Lawrenceville, GA 30043
Sales: 866-779-7906
Fax: 800-552-1431
http://www.encompassparts.com/lgconsumer

There are several known issues that can cause that.

The top candidate is the main board, the next is the Y-Main board.

Here's a link for repairing the power supply board of LG 42PG20, which also contains a link to how to test your own board to see if it is good or not:

http://www.coppelltvrepair.com/p/716/lg-42pg20-ua-power-supply-board-repair-service

Hope this helps!

call lg

You can't fix it. There is a bad board in this set; either the main board or the power supply board. You'll have to call a professional.