Sharp LC-60E79U won't power up

[Walter319]

Hello,

I have a problem with Sharp TV.
After connecting it to AC outlet LED Power lamp is blinking constantly. OPC LED is off. The power supply board looks fine, however I don't have any info about voltages on connectors of power supply board.
I tried to disconnect both master and slave inverter boards and no results.
Please help

[vlado64]

Re: Sharp LC-60E79U won't power up

: D

[Walter319]

Re: Sharp LC-60E79U won't power up

Thanks for the service manual for this TV. I have it and there is no info about voltages.
Find out there is only +5V and 3.3V on the output of the power supply. Without pressing power button the power LED blinks constantly.

Thanks for any advice.

[usahutz]

Re: Sharp LC-60E79U won't power up

I have the same tv mine is power and ocp blink together then just the power blinks any ideas?

[rlega]

Re: Sharp LC-60E79U won't power up

Walter319,

Do you still have the TV issue?

Where did you test the +5 and 3.3v?

Thanks

[Redrebel10]

Re: Sharp LC-60E79U won't power up

I have come across this problem also. When powering up the tv the power light flashes twice and the opc light flashes 5 times. According to service manual its a power supply issue. If I do a hard reset by holding volume down and input then plugging AC back into the back of the tv, all the backlights come on but the tv will do nothing else. I'm getting 5v standby reading and when I first power the tv I can get 14.2v on both pins that send power to the main board. After 3 or 4 seconds I hear a click and the voltage on those 2 14.4v pins drops to zero. Any ideas if its the power supply of something on the main board sending a signal back to shut down the tv?

[budwich]

Re: Sharp LC-60E79U won't power up

disconnect one of the cables going from the tcon to the panel. Try turning on the tv. What happens? Do the same test with other cable.

[Redrebel10]

Re: Sharp LC-60E79U won't power up

Just tried that and nothing changes, when I turn on power it takes maybe 2 or 3 seconds then the clicking noise comes from power supply board and the led code flashes power led flashes twice and opc led flashes 5 times

[dskall]

Re: Sharp LC-60E79U won't power up

Need good clear straight on pictures of back of tv with cover off and each board.

[Redrebel10]

Re: Sharp LC-60E79U won't power up

Ok thanks, I will go take some real quick

[Redrebel10]

Re: Sharp LC-60E79U won't power up

Here are the boards minus the lcd driver boards

[Redrebel10]

Re: Sharp LC-60E79U won't power up

Sorry thought I attached them on last message, I new to this wonderful forum

[Redrebel10]

Re: Sharp LC-60E79U won't power up

I just did the hard reset again by plugging in AC while holding the vol down and input button, once again all the backlights come on but nothing else will work. No way to access menu or change input. In this state is does allow all the proper voltages to hold on the psb. I do notice a small blinking red light on the main board. The light flashes next to RDA8001, not sure if that is normal.

[dskall]

Re: Sharp LC-60E79U won't power up

Are you getting voltage to your t-con pnl12v

[Redrebel10]

Re: Sharp LC-60E79U won't power up

No if I hold my lead on that pin and power up the tv is goes to .6v before the click noise is heard and then the volts drop to zero