Sharp 37" LCD Panel 5 Volt Failure

[GT6guy]

I have the following error code: POWER LED 2, OPC LED 5. In a post from June of last year a forum member indicated that this would represent a Panel 5 volt failure.

How do I repair a Panel 5 volt failure? I have a 37" Aquos that fell off a shelf. I have replaced a broken power board and two CCFL backlights. I checked the backlights before closing up the unit and they were all working. The TV comes on, gives me the error code, I do a reset, the power light no longer blinks, then can get the audio to work and backlights to work but no picture.

[tom66]

Re: Sharp 37" LCD Panel 5 Volt Failure

Do you get a 5V volt failure if the T-con is unplugged?
The t-con goes from the main board to the LCD panel connectors itself.

Some Sharp LCDs don't have separate T-cons though.

[GT6guy]

Re: Sharp 37" LCD Panel 5 Volt Failure

Yes this model LC-37D44U does not have a T-con. How do I test the main board or should I assume with the error code and no picture but do have audio that it is the main board?

[tom66]

Re: Sharp 37" LCD Panel 5 Volt Failure

Ah, I recently worked on the LC-32D44E. The T-con is on the main board itself. I'd expect the mainboard is the same -- can you show some pictures?

[GT6guy]

Re: Sharp 37" LCD Panel 5 Volt Failure

I will get a picture but one of the parts suppliers that I have used before indicated that there is no separate T-con board for this model.

[tom66]

Re: Sharp 37" LCD Panel 5 Volt Failure

All of the T-con's functions on this model are integrated onto the main board. So whilst there is no T-con board, there is a "T-con", specifically, a few voltage regulators and a large SHARP processor.

[GT6guy]

Re: Sharp 37" LCD Panel 5 Volt Failure

Main board photos for LC 37D44U

[tom66]

Re: Sharp 37" LCD Panel 5 Volt Failure

Here's the service manual for your set.
http://www.tgohome.com/ServiceManual...&Search=Submit

If you're certain it's 2 & 5, it does appear to be a panel 5V failure, so I'll have a look at what might cause that.

[tom66]

Re: Sharp 37" LCD Panel 5 Volt Failure

OK, can you test the voltage on both ends of L9601 (round dark grey object marked "220"), with red probe on one end, black on the chassis, TV powered on blinking 2-5?

[GT6guy]

Re: Sharp 37" LCD Panel 5 Volt Failure

I may have lucked into something!!! I reset it again and it appears to be working. I'll be back to you in about 10 mins....sorry

[GT6guy]

Re: Sharp 37" LCD Panel 5 Volt Failure

Before I recieved your message on testing L9601, I disassembled the unit down to where I could open and close/reseat the ribbon wires going to the LCD screen. (I had replaced two bulbs so I had the unit completely apart before. I thought perhaps the screen wasn't getting the signal) Anyway, I started the unit up, did a rest with the volume and channel buttons, plugged it into the cable, and it is working!! Thanks for your help! Hopefully this thread can help others in a similar situation......Cheers and God Save the Queen!!!

[tom66]

Re: Sharp 37" LCD Panel 5 Volt Failure

Enjoy your TV... and make sure it doesn't fall again