Screen went blank but still has great sound.I can't even see the channel display number and it also has a chirping sound. The sound is great and all but no picture.Does this type of tv use a lamp or bulb?What might be wrong?It is a philips 60PP920217 serial#77324689 DPTV 305 60HZ 120V 255 watts.It is HDTV ready.Thanks.

Sounds like a motherboard fault. Contact the authorized service center for LG. It will be best. Gopakumar Gopalan Google

Could be main AV board not receiving the proper voltage due to a failing capacitor or power transistor. So I suspect a PSU failure.

Sounds like the video board. How long have you had the set?
Is it a 19"?

Having the channel displayed is a good sign. It would be worth the estimate fee to find out what the problem is. Sounds like the Video module.

It's either the backlight lamp or backlight inverter is busted due to a power failure or fluctuation. Here's how to determine which is which:

1. Grab a flashlight.
   
2. Turn on the TV.
3. Shine the flashlight onto the screen.
4. If you cannot see any display even a faint one, the backlight inverter is dead, else the backlight lamps are busted.
5. Replace which ever is the culprit.

ViewSonic LCD (VA1912w) Went Blank

I am using this great LCD for about an year. But few times in the past my LCD didnt show up the display though the Green light was still ON, turning off the LCD and opening it again always solved the problem. But now My LCD completely went blank. Turning off/on didnt work at all now. I've tried couple of other tweaks mentioned on this site but they didnt work. I am just seeing a blank screen with green light ON. and ya theres a very low hissing sound coming from the LCD.

Does the lcd screen have a glow to it ? Or is it really dim if u get real close to screen u can see images moving ?
it it has a glow to it you panel lighting is fine but you control board is bad. If you have a dark screen and see faint images you panel back lighting is out u can check the power with a meter at the connection to inverter board on panel.

YX2 = part # 244247..................................................T.

I do not see any reference on this problem and I even checked with Sony. If you are on a cable box, I suspect that is the problem.

A chirping sound usually means that one of the secondary supplies has shorted, most likely the horizontal output transistor. The power supply "chirps", which is the sound it makes when it protects itself from drawing too much current. The set should be serviced by someone with experience in Philips projection TV'.