Question about Memorex MLT3221 32 in. LCD TV
My TV is turning off on it's own. It has random increments and it may turn of 10 seconds within turning back on or 10 minutes. It sometimes goes days without turning on. It also automatically turns on which forces me to unplug it just so it won't disturb me anymore.
There are so many different places where an intermittant problem of this kind could occur, it will be nearly impossible for anyone to give you any clear guidance on this one.
The most common failure in modern sets is related to the power supply but that kind of problem is one that appears sometimes as a gradual decay of its time to power up or a decreasing length of operating time and finally a failure to turn on at all.
There is a section that is kept 'alive' by a small part of the power supply so the set can accept commands from your remote to power up the rest of the set and the receiver of the remote's IR output stays turned on as long as AC is connected. This section could have a semiconductor that is intermittant so that it sends a command to turn the set on or off without you using the remote to send the command. There are tens of thousands of individual active and passive components in our modern sets and only one single part needs to be randomly failing to cause your problem.
There is a slim chance that the remote is the culprit since they too are never completely 'off' and it could be sending commands on its own. To eliminate this possibility, either take the battery out of the remote or put a pillow on top of it so the IR signal is absolutely disabled.
If the set still does what it pleases, then the remote is OK and the trouble is then definitely in the set itself.
The remote receiver electronics in the set could be part of the main board or a separate item on a small auxilliary board so whoever gets this to repair will need the whole set available.
Posted on Dec 07, 2008
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Posted on Jan 02, 2017
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