Question about Toshiba Televison & Video

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I have a 52HMX84 DLP projection Television. The LED indication is... Green blinks at 0.3 second intervals - red light solid. Manual indicates the lamp is not working correctly so I ordered a new one and replaced it. The exact same result. In the past, the bulbs popped and it was obvious the bulb was used up but in this case both the current bulb and new one look fine. What could it be and is it worth fixing?

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  • norm_paulsen Apr 04, 2011

    I have checked the solution provided as far as I can go. Its quite difficult to get to the board without a lot of screws removed and wires having to be adjusted. I can see and feel two capacitors but they appear flat on the top but I can't get to them easily to really check. They are about 2-3 inches high and about 1-2 inches in diameter. So I'm still working on it.

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Hello,

I think this time, your TV is having a power problem.

The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.

The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board.

I do not think it needs replacement, rather some defective capacitors are causing this issue.
Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.

The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)

You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.

What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).

You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors).
After replacing these capacitor(capacitors) most likely the normal operation will be restored.

Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.

If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.

I hope this helps.

Good luck.

Posted on Mar 31, 2011

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