LG 42PC1DV. POWERS UP NO PICTURE NO SOUND

Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Either your Y sustain board went out or your upper and lower Y buffer boards went out. Worst case scenario is your panel went out. But you won't know without replacing the other boards first.

Phone the number on this site:

http://www.partmaster.co.uk/cgi-bin/search.pl?query=LG%2042PC1DV%20&brand=LG&model=42PC1DV&model_pre=42PC1DV&path=109164&part=

copy and paste this into your search bar at the top of your browser. hope this helps.

that problem in most cases is caused by your mainboard failing Check shopjimmy.com or Andrews Electronics for price and avail.

U have cable,some kind of pay tv?Tries unplug the cable box,replug the box for reset or to update new solfware for the box.If u have free air tv,get better antena like out side door antena or a digital antena.Also should change the batteries in ur remote and clean the IR lights both remote and tv make sure no blocking path to signal.

Check setting in menu. replace main board.

The 42PC1DV has a freeze screen function. Looks like you may have accidently switched it on .....check your tv manual on how to switch it off.

need to check video driver& power supply. maybe loose solder.goodluck!

i think you have a bad power supply

If it does this on all channels then the video on your AV out from the TV is bad.

If it only happens with some channels then this is Macrovision protection working which will not allow you to record premium channels and any that are using this protection.