I have a Olevia Syntax LT27HV TV that just lost sound and picture. I took out the boards and have pictures. One board is P/N P061P3119100 and is about 7 inches square. The other board is large and has lots of components on it.

Likely the main board and most of these sets there are few or no boards available.

Three possible causes:
Power supply module with poor DC filter caps, Bad T-CON board, Backlight inverter board. Those are the assemblies to check.

http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

Ur LCD inverter backlight board is dead.Replaced this LCD inverter backlight board will get ur picture back.Tries Shopjimmy.com,Ebay.com to buy a refurbish LCD inverter backlight board for the replacement.It a long board in shape.

Ur LCD inverter board it dead,must replaced this board to get picture back. Tries Shopjimmy.com,Ebay.com to buy a LCD inverter board. is a long board usally.

It sounds like the LCD controller board problem, usually if you cool it down the problem will go away, and comes back when it heats up again.

It depends on where you lose the sound, no sound from speakers? no audio line out?
The amplifier circuits are on the main board. You should try hooking up a powered PC speakers to the audio line out to see if you get the sound, if you do, then the power amplifiers are bad (it is a single IC Class D dual amplifiers, IC U54 on the main board)

It depends on where you lose the sound, no sound from speakers? no audio line out?
The amplifier circuits are on the main board. You should try hooking up a powered PC speakers to the audio line out to see if you get the sound, if you do, then the power amplifiers are bad (it is a single IC Class D dual amplifiers, IC U54 on the main board)

Ur video converter board is dead.
Need to be change.

Since you lost both sound and picture, I would suggest to take a look at the power supply for bad filter capacitors, look for bulging on the top of capacitors. If the backlight inverter board is bad you should still get the sound.

When you tune to a station and get sound I presume the screen is black so do the following.
Place a bright flashlight against the screen. Look for an image around the edge of the flashlight.
If you see an image the problem is probably one of three causes.

1) Power to the inverter board is bad.
2) Inverter board has failed.
3) The CCFT(cold cathode fluorescent light) are dead.

Someone knowledgeable in electronics can diagnosis it.