Question about Toshiba 65H81 65" Rear Projection Television

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Tv after power surge

I have a 65H81 hd toshiba had a power surge and fried main power board. Can that weaken the rest of the items if that is the only wrong. I don't want something to go wrong later because insurance is taking care of it. would it be better to replace the tv

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I have been servicing televisions for over 20 years and I have never had any luck on a lightning strike repair. There are too many variables in electronics and IC's and these repairs can be very lengthy. I would ask for a replacement rather than a repair.


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Posted on May 17, 2009

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There isn't really an absolute answer to your question. The power supply affords some protection to the rest of the set when the components designed to prevent short-term power spikes activate but their primary purpose is the protection of the supply. There is surely a fuse on the line-side of the supply, then there are two more devices normally included (they cost little) that will force the fuse to blow if a certain line voltage peak is encountered, a type of resistor that is actually a semiconductor that has little effect until its design is exceeded; it then looks electrically more like a  dead short, causing the fuse to blow. The other device doesn't do much after the first few cycles of AC and is there to reduce 'inrush' current. Well-designed supplies will have fuses on the output side of the supply that protect specific voltages and circuits.
Could the low-level circuits have been affected?  Yes, but in some cases, only a working supply and time would show up some kinds of failures.
In addition, I always include the suggestion pasted below:
If you live in an area of frequent lightning strikes, investing in a 'whole house' surge arrester makes sense.
These are installed in the main breaker box and any brand I've seen comes with a $10-25,000 insurance policy to replace any dead appliances that fail despite the surge protector.
They cost $150-250 US plus installation which you can save if you are afraid to DIY.         

Posted on May 17, 2009

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http://servicemanuals.vstore.ca/

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Hello

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No need to take the front screen out. The power deflection board is messing up with that red light.
Nic

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