Question about Toshiba REGZA 42WLG66 42 in. HD-Ready LCD Television

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Thoshiba regza 42wlg66 problem witu power on, red lamp switch on but hears noise tik tak and no picture

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

walesarumi
  • 6993 Answers

SOURCE: hi i was watching my tv when it made a pop noise the screen went dead but the power light is still on.

Hello,

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. You might be lucky it's just a blow fuse. Also a defective transformer can cause your TV not to power on.

All these can be checked on the power supply board.

But more often bad capacitors causes problem on the power supply board. I do not think the power board needs replacement, rather those defective capacitors is 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. Or you can by a refurbished complete power board to save you some stress.

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.

Regards.

Posted on Jan 05, 2012

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You can unplug the set and or a box both if connected for several minutes and then power back to see if when they reboot set works or not.

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Hello there,

Step 1: turn off the Power to the TV by first with the remote then removing the power Cord leave the power cord off for next step.

Step 2:

Check all the connections if you are using the blue,green.Red remove them and plug them back in making sure they are connected correctly .

Step 3: Power the TV back on if the TV has a setup page follow the Setup

thank you let me know if the problem is still there and we try more steps.

Don't forget to Rate

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1 Answer

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