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We have a Toshiba 42HM66 DLP. It is at least 3 years old and the lamp had never been changed. Lately the picture has gotten darker and once the unit is on for awhile the picture starts flickering and colors are not right. We assumed it was the lamp. Changed the lamp and still the same problem. Called Toshiba, they could not help but said picture flickering is not a symptom of needing a new lamp. They suggested we call a tech and they gave us a reference. The tech came out and agreed the picture was bad even though a brand new bulb was just installed however it did not start flickering while he was there. He suggested that when it does to call him. He has never seen a problem like this in this model before and his only thought was it was some part that would cost a few hundred dollars. Anyone else have any idea? The owner of this TV is terminally ill and I would hate for her to have to buy a new TV at this point.

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  • Lisa Fratangelo
    Lisa Fratangelo Apr 06, 2011

    OK. Please bare in mind I do not know what you mean by Inverter or capacitor. How to I confirm it is not one of these things? We also have a Roku box connected to the TV and when that was on the screen still flickers. However, when I have the menu up, the menu itself is not flickering but the background is.

  • Lisa Fratangelo
    Lisa Fratangelo Apr 06, 2011

    Great I will check and see. Are these expensive parts to replace?

  • Lisa Fratangelo
    Lisa Fratangelo Apr 22, 2011

    OK. The repair man said that these TV's do not have an inverter because it is a DLP. But he still hasn't figured out the problem. Maybe I orignally posted this in the wrong area of this website. However, the flickering seems to have stopped but the picture quality is terrible. This is with the new bulb installed. What besides a bulb would make the picture so bad? You can watch the TV but there is no HD quality that I can tell. The picture is either too dark or too light. Not crisp.



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Check if the flickering happens when you have the menu up on the screen. If the menu does not flicker it may be the source of the signal or the connections to it or probable the board where the connections are terminating at. It may also be a problem at the inverter. It may be due to a capacitor that is leaking or swollen and is starting to go bad.

Posted on Apr 06, 2011

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  • Nicolo Carlo Parazo Apr 06, 2011

    I see. The inverter is one of the boards on the tv but replacing or taking this off may need a specialist as for the capacitor it looks like cylinders and may have different colors with two legs attached to the circuit board. If they are leaking or swollen they need to be taken out. The technician may not have inspected them.

  • Nicolo Carlo Parazo Apr 06, 2011

    the inverter may be pricey but the capacitors, they are the cheap ones the power supply circuit may also be the culprit. It is the first circuit after the power cable. Check for the capacitors as well. The power supply circuit may be a little cheaper than the inverter. Check first my first suggestion if it happens on the menu... thanks

  • Nicolo Carlo Parazo Apr 23, 2011

    did you notice the same problem in all inputs, like DVD players, using the round RCA connectors or TV connection? For the dark or light picture how does adjusting the contrast help? Did you notice the fan turn on or off? I am thinking that its could be a convergence IC issue (one of the flat things on the board with many legs on it) or still a power supply issue if the fan keeps on turning or there was a voltage drop or surge if the repairman measured them.



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