Sharp LC-13AV4U - turn it on and in ten seconds it turns off. Happens every time. In 10 sec I can't even get to/through menu. Anu Ideas?
Sharp LC-13AV4U - turn it on and in ten seconds it turns off.
Happens every time.
Any Ideas?
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DO THIS AT YOUR OWN RISK!
This is NOT a fix, this is a permanent band-aid.
All you need is a phillips head and tiny diagonal cutters....
Heck, even a nail clipper would do it.
Just disable that faulty protection shut-down circuit!
Remove all the screws from the back cover
and look at the main board with the
unplugged! power cord towards you.
In the upper right corner of the board, you will find
a tiny red-striped zener diode, labeled as D409.
It is to the right of an electrolytic capacitor marked C403.
Snip this diode, at either end, or snip both ends and discard it.
Re-assemble the TV.....and you just got your tv back!.
I only run mine when I am sitting in front of it,
I never leave it running unattended....just in case!
Don't blame me it yours burns up....but mine is just fine.
The Robot Doctor.
Posted on Dec 13, 2008
THANK TO THE PERSON THAHT HELP OTHERS WHITH THE INFORMATION THATH THEY HAVE THANK YOUUUUUUUUU
This worked for me as well. Just snipped D409 and it now is running fine. I just garbage picked this two hours ago. I'll run it awhile and monitor it. Thanks.
Thank you so much!!! Just did it and worked like a charm!!! Hardest part was getting the back off--finding all the screws. Really appreciate it! Was going to pay an online technician or buy new TV, so you saved me some money!!! Awesome!
This "repair" was spot on! seems to trouble with these units. Mine has been working for months now and no troubles to report. Thanks Doc!!
Amazing what the internet can do! typed in the model number of my tv with the similar problem of shutting down after 10 secs, and within in 5 minutes I had it fixed....Thankyou!
Thanks doc! You were spot on! Works like a charm. Saved me having to remodel my kitchen to accommodate a larger monitor! I will heed your precautionary advice regarding not leaving the TV on unattended... Just in case.
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My sharp LC-AV134U Had the turn itself off symptom. I tried freezing and heating the board but I could not pin point the bad component. After a few cycles I could no longer replicate the problem and the set was working. This lasted about 2 weeks at that point suddenly the set was dead with a slight ticking sound. I found D631 was shorted I replaced it with an NTE 506. It has been running for 3 weeks now no problems. I suggest that everyone try a new D631.
Posted on Oct 21, 2008
Hi, all found this out: If you hold a channel up or down button while you press power, the set powers on without the backlight on and will stay on as long as you hold the button.
On the top left of the main circuit board is a capacitor C403. If you short the + lead to ground then push the power button, the set will stay on! There is a Zener diode D409 next to the cap with it's cathode connected to the + lead. I think this may be part of a protection circuit for the backlight circuit. When the voltage on the cap reaches .6, the set shuts off. Must be turning on a transistor but could not trace due to white paint on board.
Posted on May 30, 2008
Carampman,
Holding channel up/down didn't work for me. First lost power after multiple seconds of power on. Local authorized dealer could not fix it. Sent this lemon with it's 90 day labor 1 year parts after three months. $140.00 labor, $40.00 return shipping charge and it still failed. Returned it again and it
was fixed. Now after 2 years since purchase, the same problem.
Sharp must have known this was a lemon and made the labor warranty quite short to cover them selves on this lemon.
Posted on Jun 28, 2008
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SHARP LC13AF4U LCD TV NEW OUT OF BOX..NO AF NO RASTER NO CLICK
REMOVED BACK..VISUAL..NO SMELL, NO BURNT, WIGGLED THINGS, CHECKED B+ ...165VDC, WW RES OK, PWR SW CONTINUITY OK,
NO SCHEMATICS AVBL USUAL SOURCES...MFR REFUSES LITERATURE.
Mine turns it's self off after about 10 sec everytime you turn it on. anyone know why?
Having the exact same problem here too after about 13 months of operation. Local repair shops claim about $100 to repair but won't give any clue as to what module is blown.
Same problem, set turns itself off in about 10 secods- it also appears the screen is dim, like the backlight is an issue or the circuitry driving the back light.
Same problem! Love the little TV and it just started turning it self off after a few seconds. Happens every time.
Also having the same problem. Turns itself off after 5 sec.
Same problem, plays 10 seconds and powers off.
it turn off and on in seconds
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