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Allen, Technician
Category: TV
Satisfied Customers: 676
Experience:  37 years tv service with Panasonic, Hitachi ,RCA
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When I turn on my 42 LG LCD tv the screen remains blue, yet

Customer Question

When I turn on my 42" LG LCD tv the screen remains blue, yet I watched it this morning. What is wrong how can I repair it.
Submitted: 7 years ago.
Category: TV
Expert:  Allen replied 7 years ago.

Do you see the on screen indicators, volume up , channel number etc?


Do you have other tv's in the house connected to same cable , antenna, sattelite?


What are you using Sat, cable , off air antenna?


Will a dvd playback?

Customer: replied 7 years ago.

Nothing appears on the screen - it is completely blue, no channel, volume or any indicator.

Yes our other tvs work fine.

We use comcast cable.

No a DVD will not play on the screen

Plus it seems like it takes a really long time for the tv to turn on and off.

Expert:  Allen replied 7 years ago.

Hi again,


Thanks for the additional info.


This is a fairly technical repair that would require unsoldering capacitors and installing

new capacitors.


My records show that there have been many failures of C235 [email protected] capacitors in the power supply.


Some symptoms include backlight only (blue screen) or Intermittent picture and sound. No menu operation , slow power on & off. Replaced 2200uf 10v caps on Main power Supply board. check for bulges in these capacitors.

check these capacitors as well CAPS C235, C201, C218, C219 .






Allen and 5 other TV Specialists are ready to help you
Customer: replied 7 years ago.
So is this something a tv repair person can do and is it an expensive fix or one that should be done - rather than purchasing a new tv?
Expert:  Allen replied 7 years ago.

It is something an experienced TV repair person could do.

I would think a fair cost to repair should be in the $150.00 to 175.00 range.


Parts cost would be 20 to 30 dollars, the rest labor.