Question about Toshiba 62HMX84 62" Rear Projection HDTV

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Toshiba 62HM196. Original tv would not start up. Was indicated that is was the ballast. I purchased a used ballast and installed it. Now the TV begins to start up, the blue lamp on front turns on, the light begins to light for say about 10 seconds, slowly getting brighter, then tv shuts down before it is fully lit. The yellow lamp will on front of tv will then tend to blink 9 times after this may happen. Usually have to wait maybe 30 seconds or more before tv will try to power back on again. When I try the second time, it may begin to light but turn off much faster. I have seen the yellow lamp blink five times, and sometimes 9 times. I know on the third attempt to start the tv, the bulb lamp will not light, but attempts after it may begin to light. I don't know if it is the lamp, the ballast or the light engine. I never see the red light come on. I looked at other parts of the tv such as power board and visiblity they seem okay but not electrically tested. I am hoping someone can point me in the right direction and help eliminate what the problem may be. If someone knows the diode part numbers used on the ballast I could attempt to repair the original ballast as well. Thanks

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  • glabadie288 Sep 12, 2010

    Thanks, I will give the lamp a try.

    I was also looking at re-building the ballast I took out. I am fairly certain it is the diodes on the ballast board but haven't been able to identify what they are. A schematic was not provided with the service manual for the ballast. Specifically D4, D5, D2 and CR1

  • glabadie288 Sep 22, 2010

    I purchased a lamp, and the tv still will not start up. The symptoms are unchanged. I was wondering if there is a light sensor or something that has failed. Any other suggestions of where to look? I have the service manual and schematics.

  • glabadie288 Sep 23, 2010

    Yes, all the fans appear to be running



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Lamp needs to be replaced,
Mats has them for $99.00 1-800-628-1118

Posted on Sep 11, 2010

  • 3 more comments 
  • ladywinn
    ladywinn Sep 13, 2010

    On the old ballast board resolder board and replace the Big Capacitor on board,then when you get new lamp see if it works.

  • glabadie288 Sep 22, 2010

    Your help is much appreciated. I changed the bulb, but the condition remains unchanged. Do you have other suggested tests to help determine why tv will not start?

  • ladywinn
    ladywinn Sep 22, 2010

    OK some of my buddies have had good results with resoldering Ballast board and replacing the Big Capacitor on board. When Set starts to turn on is all the Fans Running?
    Ballast Board PN# 75002847 had themyou can go to their website and you need to look on Ebay ,I got Ballast Board for my TV for $65.00 Look under Electronics/Parts
    type in Part number.

  • ladywinn
    ladywinn Sep 22, 2010

    Encompass Parts Distribution Might have Service Manual for this TV?

  • glabadie288 Sep 23, 2010

    Yes, All the fans are running.



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