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Samsung sp53j5hfx rear projector tv wont turn on. green light goes on makes a starting noise for a few sec then clicks and green light goes red then cycles again green light for a few sec then clicks and keeps repeating with no picture. if you leave it for an hour it may turn on with a perfect picture. any help would be appreciated

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The convergence circuit has gone bad. Probably one of the two STK IC chips has failed.

Posted on Nov 04, 2008

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Dear Sir/Madam,

Some Projection TV's has a small round fuse in the back inside by the power cord. This fuse may be blown out. Before removing the back cover be safe and unplug the TV. Also if the inside is dusty take a duster and blow some of the dust out.

thanks
good luck

Posted on Nov 04, 2008

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Check your earthing is working proper also try with other power supply.may be some waltage fluctuatiuon.

Posted on Nov 04, 2008

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Check all input connections was properly connected.

if this was all check and corrected and the problem was still there, you will need the to check for any fault on the board the noise may be coming from the faulty capacitor inside.

Posted on Nov 04, 2008

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That means that the TV is in prtotect mode.
Start unplugging power cord for ten minutes or so.

Posted on Nov 04, 2008

  • Ginko
    Ginko Nov 04, 2008

    If you leave it off for one hour and get picture, try leaving unplugged overnight, sounds like draining power from the set completely can fix the problem.

    If you still get the problem, that is probably a component overheating, and sending the TV in protect mode.

    The Tv should be taken apart , and inspected by a technician.

    If theer is dust inside, that can cause similar problems, the inside should be cleaned with a battery power mini hoover, a regular hoover can damage circuits.

    If you do not notice any thing wrong, then that means that this is caused by a defective component, probably a blown capacitor or a defective circuit.

    Common problems are power supply faults, and problems with horizontal deflection circuits.
    The TV must be tested thoroughly by a technician to find the fault.


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This may be caused by convergence IC's being defective and some resistors around them not being the proper values.

I have repaired another Hitachi model Rear Projection TV that would start up and click click click and flashing red light, then replaced the convergence IC's STK392 series and a few burned up resistors and good as new :)

You will have to be handy with a soldering iron to complete this task, and there is a kit you can buy also http://www.tvrepairkits.com/xcart/60sbx78b/ it comes with everything you need and even teach you how to solder if your not already good at it.

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This is a diagnostic tool--points to which voltage is failing and then you follow where it goes to.

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