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Re: tv overheats in 15 mins
It initially looks like you will need to remove the back panel. Using a large can of condensed air from a place like radio shack.
Spray the air from the top downward & do not!!! use a vacuum cleaner because it causes static electricity and will fry the TV.
You can have it ready to get the dust up tho.
How close is it from the wall? Is there any "vents" nearby?
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Temperature is a common
reason why many Rear-projection TVs do not perform well when they get to hot.
You may start to see your TV shutting down automatically when it overheats.
Here are a couple of things you can do to prevent overheating. First make
certain any TV ventilation ports are free and clear of debris and dust. Second
make sure the TV has enough room for airflow. Third, the temperature in
the room should be around 72 degrees. Due to the high degree of heat generated
by a rear-projection TVs, it is not advisable to watch TV on a hot days when
you don't run the air condition. This could cause damage to your TV.
Improperly configuring TV setting can cause
problems. Verify the TV settings are set correctly. First, brightness and
contrast should not be set to high or to low because this can cause poor
picture images. Second, adjust the color on the TV when the picture displays
colors poorly. Third, if you are having sound issues then check to make sure
the volume is not muted or turn down all the way.
It probably has a fault.But try this.Disconnect all speakers and inputs
and try again.If that works reconnect the speakers A PAIR AT a
Time.That should lead to the fault.If that still shuts down.
the set is going into protection mode. This is caused when ever one of
the many sections of the tv has a shorted circuit. The increase in
current is detected by the protection circuit and it flies into action
by turning OFF the ON relay.
Most often, but not always, it is either the high voltage section or
one of the deflection amplifiers. But can be the power supply, the
audio amplifier or voltage regulators, etc.
It's the problem of overheating in the power supply board of the TV.on the power supply board of the tv there are few capacitors and IC.any of this ic is got short or may be weak.so due to this when you start the TV the current passes from electric outlet to the power supply board of TV.but when the current passes from that weak/faulty part at that time current gets stopped or slow and the board overheats and TV shuts off. this is a common problem faced by many other users too.the possible option to solve this issue is to check the power supply board by a meter and continuity tester and replace the faulty component on the board which is short due to which power supply board is getting overheated.its bit technical job but yes its not at all a costly repair to do or get it done by the technician. for required parts it can be easily available from local electronic hardware shop. This will help.
My 50HM66 did the same thing. Try putting a fan to the side of the tv so it blows cool air around the back. I also removed lamp and vaccuumed as best I could. I think this is an overheating issue with the tv.
It may be overheating. Check the temperature with your hand by placing it over the fans/slots to feel for any excessive heat. If it won't turn back on until it cools, then it's a heat issue. You could help that out by using fans to circulate the air around the unit, trying to keep it cool by moving the hot air released from it and pulling in cooler air. Other than that, there may be a short somewhere, or maybe even a broken fan.
2 times, Diagnosis: B
overcurrent (OCP). Possible causes: H. OUT (Q8024) is shorted. (D
board), +B PWM (Q8035, 8038) is shorted. (D board) Symptoms of the
problem: Power does not come on, Load on power line is shorted.
This is not DIY stuff and is dangerous to play around with. I suggest you get a tech to fix it rather than opening it up and doing it yourself. Also dont keep turning it on in the hope it will start. It is more likely to start a fire if it begins to overheat from being constantly started and left plugged in.UNPLUG it
There might be three or more reasons for this:
1) The sleep timer may be on causing the TV to turn off after a preset time.
2) If sleep timer is on and no signal from the remote is received for a preset time (Samsung: 15 minutes) the tv will turn itself off.
3) The TV may have been turned on automaticaly with "On Timer". If so, and no signal is received for a preset time (Samsung: 3 hours) the tv will turn itself off.
4) A fan is not working or a vent is blocked causing the TV to overheat and turn off.
For 1) thru 3), go to the "setup" menu and make sure "sleep timer" and "On Timer" are turned off.