Question about Mitsubishi WT-42413 42" Rear Projection HDTV-Ready Television

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Mitsubishi vs4571 my power was out for 11 days from hurricane Ike when came back on my Mitsubish1 4571 will not power up and its not the plug. Help me.

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1. Try this - hold the menu button down for 10 seconds. TVshould power up; you will have to turnoff front panel buttons on menu.

2. You can also try a hard reset: Unplug TV from AC mains and remove all cablesfrom TV. Wait about 30 minutes and re-plug to AC power and redo the cabling.Switch on the TV and see if it works..

3. Powering down the set or putting it in standby may haveallowed the power supply to cool. Weak capacitors often go out of spec whenthey cool, thus preventing a section of the power supply from firing upproperly again. There is a simple trick...just warm the back of the TV with ahair dryer for 5-7 mins after you have unplugged the TV. Look for the littleareas of holes in the back panel of TV. Use these as your guide at where to usethe hairdryer, but don't hold the dryer too close (say 5-6inches away). (Makesure the dryer is on High heat). If the TV doesn't turn on after you haveheated it up (like it tries to come on but then turns off) you need to unplugthe TV again, this resets it. And repeat those steps till it works. Resettingthe TV after it fails to turn on is the key. Also, just leave the TV on. Don'tturn in off. Since it is LCD, it doesn't take much power...only a few bucksextra a month for your utility bill.

4. A circuit board may crack about some of the largercomponents mounted on it. You can inspect the PCB's for fractures, and thenrepair them. It may also be poor soldering that has failed. I would be checkingfor these things first.


5. There could be an issue with the power board. If you want to go in for a long term solution, you caneasily replace the whole power board or just change the faulty capacitors. Youwill have to open the back panel and take a look. You can make out which arefaulty, because their caps will be swollen on top. Here's a sample pic of abust capacitor (not same model):
mitsubishi vs4571 - 6c84f09.jpg
Check the specifications of the faulty capacitors, and get the replacementsfrom your local electronics shop. If you are comfortable with this, you can usea pair of needle nose pliers to G-E-N-T-L-Y pull out the defunct capacitors.Once that is done, solder in the new capacitors carefully. If are unsure how todo this, try to get a friend who knows this kinda stuff to do it for you, orget a qualified technician.
Warning: If you do not have a background inelectronics repair, or are inexperienced, get a qualified technician to do itfor you.

REMEMBER there are very dangerous voltages inside a TVthat can KILL. Be sure to work SAFE when dealing with electricity. DISCONNECTTHE POWER BEFORE YOU DO ANYTHING.

Posted on Oct 04, 2008

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