Sharp Aquos LC-42D65U No Backlight/Sound

[musjim]

I have a Sharp Aquos that has a blinking power light only. Based on the service manual it says it has a bad panel? Can I take this at face value or could it be another issue? I've checked voltages to the inverter and main board. They check good to what is on the power board. I've unplugged the tcon board to see if I can just get the backlights, but nothing.

[musjim]

Re: Sharp Aquos LC-42D65U No Backlight/Sound

Update - after confirming voltages, decided to swap out inverter. The inverter looks like some children soldered it together. I could confirm 24v going to the transformers but it seems like the startup would fail when trying to start the backlights. New inverter works, backlights working.

[PlainBill]

Re: Sharp Aquos LC-42D65U No Backlight/Sound

Update - after confirming voltages, decided to swap out inverter. The inverter looks like some children soldered it together. I could confirm 24v going to the transformers but it seems like the startup would fail when trying to start the backlights. New inverter works, backlights working.

This brings up a point I seldom think about. On many TVs the inverter is considered part of the LCD panel.
PlainBill

[Shane711]

Re: Sharp Aquos LC-42D65U No Backlight/Sound

Good to know that the manufacture considers the Inverter Board part of the LCD panel. I have noticed that when they ship out new screens it comes with parts. Sometimes they come with all the parts except for the main board and Power Supply.

I am about to work on this LC-42D65U, I will look first at the Inverter Board.

[budm]

Re: Sharp Aquos LC-42D65U No Backlight/Sound

Good to know that the manufacture considers the Inverter Board part of the LCD panel. I have noticed that when they ship out new screens it comes with parts. Sometimes they come with all the parts except for the main board and Power Supply.

I am about to work on this LC-42D65U, I will look first at the Inverter Board.

If you look at the spec sheet of the LCD panel, you will see spec sheet of the T-CON and the Inverter board, those two boards are usually shipped with the panel to the TV manufacturer.
The newer panel with LED backlights usually does not come with LED drivers.

[Shane711]

Re: Sharp Aquos LC-42D65U No Backlight/Sound

I have a Brand New 60" Samsung Plasma Screen right here, still wrapped in plastic. No TV to put it in. It has all the boards on it except the power and main. And there is no buttons. All I need is a frame.