<!-- from fixya rte -->Power on nopicture or sound - RCA 50" LCD HDTV 50LB45RQ - ON Corp US, Inc

Sounds like a main board fault. Contact any service technician, or authorized service center for Zenith. Gopakumar Gopalan Google

I just answered that a while ago, why do you people ask the same thing several times?

I see so many here with no sound/nopicture issues:

ISSUES:

1. IF sound main fuse/s are good.
2. If no power or standby check main fuse, standby power supply and any signsof damage you can see---burnt parts etc.
3. almost all these sets the troubleshooting involves checking voltages on the main power board to narrow down theproblem.
4. Be safe and if you do not know what you are doing don't open the set.

Answers to issues:

1. RE:fuses---if a blown fuse is found get a good replacement(not the genericones like Radio Shack). Many fuses are special even aside from amperage--Don'tput a higher rated amperage fuse in the set for any reason.

2. RE: power supply in set: if total dead aside from main fuse the set uses astandby power supply that runs 7/24 and a main supply (some are combined andsome not.

Here aside from checking fuses you want to examine all the filter caps on thepower/standby to see if any are puffed up or buldged up in some fashion--Iattach a photo of a good one---top should be silver metal and PERFECTLY flatand have no brown material coming out on top or bottom.

What happens in the standby area is they use caps with too low a voltage rating(saves money) which causes them to fail in a year or two---the standby runs7/24 and the heat dries out the caps and they fail.

3. Trouble shooting consists of the above and then at some point you have to buyand try a board to see if it fixes it or not.

4. Safety first--no TV set is worth getting injured or even killed over.If set is opened at least look for puffed up and bad caps like in thisphoto.

the inverter is the usual cause of that issue, some westinghouse models have the inverter combined with the power board. You can get the replacement board and free tech assistance from www.tvrepairworld.com

hi what brand and model do you have so i can help you for further solution.

LCD TV INVERTER MAY NEED REPLACING?

No you can not hook up a ps2 to the dual. It hads audio inputs but no video inputs

THE CLICK IS THE MAIN RELAY-THAT MEANS THE FUSES ARE NOT BLOWN---USUALLY PROBLEMS WITH THESE SYMTOMS IS HIGH DOLLAR TO REPAIR!! HV PARTS ,YOKE ETC....NOT GOOD!!!!!

Try this:

There may be a fuse just inside the back cover that needs replacing.
OR:
Unplug the power cord for a half hour and try it again; this process will reset the power management system inside the set

No vertical deflection. Vertical output IC, caps.