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Re: please help me
This may be that the power supply has failed, or there is a short somewhere. Many times, the problems occure in the scan amplifiers and in the power supply.
The set will require shop service to get it working again. Considering the type of set and age, I would be seriously considering a new LCD or Plasma set. Your set may be fairly expensvive to service, and with its age its reliability will be lower.
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You need to trouble shoot your power supply. There is a toshiba power supply and shutdown circuit troubleshooter available for your model at the following link for 10.99 They will also provide free unlimited assistance after you purchase a manual. They will either mail it or email it. If you'd like it emailed you must return to the site after purchase and click on the contact link and request that they email it along with the info on how to obtain the free support. just provide the email address you want it sent to. Hers the link. http://servicemanuals.vstore.ca/
Pull off the back pressboard. At the bottom left hand corner is the power cord that attaches to the power supply board. There is a white plug that attaches directly to the power cord. With the TV power off, pull this white plug up to disconnect. Then push it back in. Then plug your TV back in and press the power button on the front of the TV. I just did this and it is working fine.
You have a bad regulator IC or something in the seweep power supply is blow out. if you can read a schematic, i suggest you get one to troubleshoot the solid state circuits in this TV set. if you do not have any solid state repair experience or no electronic background, play it safe and call in a pro to assist you in the repair of this TV set. Good Luck.