My hd52g886 has intermitten picture with sound

The lamp of course will or should not affect the sound---next time it is cold try it on a rear input---a DVD player etc to see if same issue--this could narrow down where the problem is.

if the tv blacks out and the light in front stays on its the backlight going out...my first vizio did it within 3 mos of purchase had to send in and they ended up sending whole new tv

Here is the manual http://www.retrevo.com/support/JVC-HD-52G886-TVs-manual/id/279ci059/t/2/, also may need to go into picture advance settings to do some calibrations.

This is standyby mode problem.remove stand by transistor and on the tv through series cvonnection and find the problem

that is look like you have a bad soldering in the main power circuit and higvoltage circuit HORIZONTAL OUT PUT TRANSISTOR ?/use a magnifier to check for cracked solder you probly find some one...
hope that help

Could be the signal board has a bad cap, in this case it sounds like you are getting intermitten power to the inverters....when the tv goes down and of course you have audio....Shine a flashlight on to screen and see if you have a picture...look carefully. If this is the case..you have the above problem!

A projection tv that has color issues is usually due to bad ballast which is attached to color wheel which you should also look at to make sure the colors are not mixed together and wheel is not warped.

I just got through explaining this to someone else - the HDCP encryption system that Philips uses is not future-proof - you will continue to have this problem as long as you use an HDMI connection with a Philips TV. My advice, which you can take or leave, is to use Component (Red, Green and Blue) cables. you won't get 1080p, but you will get 1080i, which is pretty close.

-Tha Mp3 Doctor

if you can bring up a menu and change sources to alternate signal and video is present then tv is fine but if you are unable to bring up menu and no video from any source then problem is most likely going to be with the small signal board

try ptscorp.com