Sharp LC-60E78UN

[ETLABS]

Television arrived "dead". No picture, No sound, after plugging in and without hitting the power button the set will attempt to come on Green Power LED (solid on). Approx. every 15 seconds the power relay would cycle until the third time. After the third instance the POWER and OPC LEDs will flash, followed by the POWER LED flashing twice more (OPC/Power once - Power Twice more for a total of 3 POWER and 1 OPC).

I tried the forced resets - called SHARP consumer assistance to confirm - no results. They would not convey any assistance for the Flashing Code.

Backlighting does NOT seem to even try to come on.

I tried unplugging the EL Backlight modules to see if the OPC/POWER flashing failure would change with no luck.

Researching the WEB (including this site) indicated a POWER BOARD as a likely failure (and common). I purchased a rebuilt PS board and the set exhibits the exact same failure.

Can anyone assist? I don't know if this is a MAIN BOARD, Back Light board, T-Con, etc.... or a bad panel. It was working fine before it failed.

I downloaded a service manual I found on the WEB but it is virtually useless.

I don't want to "TRASH" a 60", 4 year old, LCD set before at least giving it one last shot.

THX in advance.

Ed

[freakaftr8]

Re: Sharp LC-60E78UN

You say it arrived? Any indication that it was dropped? That flashes associated with backlight failure. If the panel was having a problem you would get a 2-5 flash. You could have a broken CCFL behind the screen or ones that have failed. Are you getting any indication of backlight on off the pin on the power supply this voltage will either go high or go low upon power up

[ETLABS]

Re: Sharp LC-60E78UN

Freakaftr8: I have not checked the Pin on the PS as I'm not sure which it is. Any service information I found for this set is very limited - almost useless. Do you know which pin to check? There is no indication it was dropped. Actually it belongs to an old time customer of mine that had it hung on the wall when it failed, so I doubt it dropped. There is NO ATTEMPT at all that I can see for the CCFL to come on........no flash, no partial. I tried unplugging one side at a time also. No difference, same issue. Whatever the issue is it appears to not let the set "power on" as there is no sound either. Is there anything I should look for on the CCFL driver boards? THX in advance. I appreciate the feedback. I knew the panel failure was a 2-5 so that's encouraging but a CCFL failure (lamps) isn't promising....

[freakaftr8]

Re: Sharp LC-60E78UN

Well the first.thing I normally check is to make sure you are getting the proper voltages. Do yiu have a pin going from ps to mainboard labeled ps_on or backlight on?