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I have Acer At3220 tv that shuts off after 20 minutes. Then won't come on until power is unplugged

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5 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 395 Answers

SOURCE: TV shutsoff after 20 min

replace the SSB modual

Posted on Jan 03, 2008

  • 534 Answers

SOURCE: Fujitsu 42" Plasma Display shuts off after 20 minutes

This is most likely caused by the Main Power pcb.

See Fujitsu Service Bulletin on this problem in a similar model from Fujitsu. -see link below
http://tomtom2k5.free.fr/fujitsu/PDP-0035-06.pdf

A competent service technician should be able to implement the service bulletin.
A similar service bulletin is probably available for your model. Request bulletin from Fujitsu 'service@fujitsugeneral.com'

Posted on Jun 05, 2009

toolkits
  • 1099 Answers

SOURCE: My LG 42"tv shuts off by it self

hello, The best way to fix this is by opening the back cover of the television set.
The power light may be flashing or if you are runing with a series light bulb it may be cycling on and off continuously. There may be a chirping or clicking sound from inside the set. (Note: using too small a series light bulb load during testing for the size of the TV may also result in this condition.)
If there is a low voltage regulator or separate switching supply, it could be cycling on and off if the horizontal output, flyback, or one of its secondary loads were defective.
Does this TV have a separate low voltage regulator and/or switching power supply or is it all part of the flyback circuit? For the following, I assume it is all in one (most common).
Some simple things to try first:
Verify that the main filter capacitor is doing its job. Excessive ripple on the rectified line voltage bus can cause various forms of shutdown behavior. An easy test is to jumper across the capacitor with one of at least equal voltage rating and similar capacitance (make connections with power off!).
Use a Variac, if possible, to bring up the input voltage slowly and see if the TV works at any point without shutting down. If it does, this could be an indication of X-ray protection circuit kicking in, though this will usually latch and keep the set shut off if excessive HV were detected.

Posted on May 20, 2010

  • 25 Answers

SOURCE: my tv won't power on after lightning struck

Check the fuses on the power board. there is one fuse on primary side and one on secondary side.
Take of back panel and follow plug into the tv.where it ends is the power board.always use caution.the capacitors in there hold high voltage even after unplugged for a couple of days.Discharge capacitors before servicing the board.

Posted on Jun 28, 2011

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2 Answers

Samsung TV shutting off by itself and relays clicking


If you don't know what you're doing, don't open it up to fix it!
There are HAZARDOUS voltages on the power supply board EVEN WITH THE TV UNPLUGGED!!! The capacitors can hold a charge for several weeks!

Clicking noise can be coming from bad capacitors on the power supply board.



It's usually easier to just replace the power supply board.

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This is the cause; 3 red flashes is bad main logic or power board, check for standby volts if ok replace main logic board

May 06, 2017 | Sony Televison & Video

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Tv remains on for about 20 minutes then shuts off by itself and won't come back on. please help


does the power indicator blink when the set shuts down? If so thats an error code let me know the number of blinks and I will assist with the reason why the set is shutting down.

Jan 20, 2012 | Sony BRAVIA KDL-52W4100 52 in. LCD HDTV

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My Mitsubishi Medallion tv stays on for about 10 minutes and then shuts down and won't turn back on until a period of time has passed. It is a rear projection tv about 9 years old. Can anyone help ex


When it shuts off and the green power light goes off, press both the menu and input buttons on the front of the set (not the remote) and hold both for about five seconds and release.

Power light will blink a two digit error code like 2 blinks and then 3 blinks and repeat it several times.

What is the error code?

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I have an acer AT3220 lcd tv i had problems turning it on now it just shows a red light wont turn on at all any ideas ie which capacitor or any other information would be brill as im now back to a 28inch...


Open the back of the tv check th epower supply for busted/leaking or swollen capacitors - if you have experience solder some new ones in place - use the 105degress one for a longer lasting capacitor - the radio shack ones will work but they are rated at 85 degrees and wont last as long.

thanks,
michael

Mar 31, 2011 | Acer Televison & Video

1 Answer

TV shuts off after 15/20 mins!!


 Dear customer,
       It could be the transformer. The problem with protection circuit shut downs is you don't know which section is causing the trouble.  The protection system is really just a current sampler that when it detects an excessive current it opens up the power relay and shuts the power off.  And, as you indicated, unplugging for a few minutes will reset the protection detector.

But, there are about 8 or 10 sections within the tv and you don't know which section has the excessive current.   Most common causes are power supply, high voltage supply, deflection amplifiers or audio amplifier.  It usually takes a tech a few minutes to take some voltages and other checks to zero in on the culprit. Once the section is known then that tech can troubleshoot it for the bad component or shorted condition.
               Usually  it works fine until there is a signal coming in through the coaxial port. that is wen the tv gets switched off. Its a possibilty. Checking the  power supply unit of ur tv and see if it has malfunctioned and  check your power cable for starters.. 
Plz rate this solution.. thank you..

Apr 08, 2009 | RCA F31672ET TV

1 Answer

TV pops then shuts off.


FUNNY.... cause I just started having this problem also... I have had this TV since they first came out. LOVED it.. now I HATE it. I can watch for about an hour then POP the TV shorts.
wait a couple of minutes and you can get maybe another hour until POP again!

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