Question about Toshiba 57H82 57" Rear Projection Television

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LIghtning power surge fried transformer

Had a service guy come over and tell me that a power surge fried my power board and that I need a new power kit.
Can I order this part and install it myself? He wants to charge me 300.00 for the repair.


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Re: LIghtning power surge fried transformer

I would call the insurance company first, the set will never be the same.

Posted on Dec 05, 2007

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Need a downloadable manual for this piece. Lightning struck house now have a fried part...

What model TV is it from ? The Powers Supply schematics are usually found in the TV service manuals. The information in the service manuals is very limited and you most likely won't be able to get a full schematic of the PS.
Alternativly buy a replacement board. They seem to be widely available.
- -
It may be the cost effective answer as service manuals are quite often, not cheap.

Nov 03, 2014 | Sharp ADTVA2415SA4 Power Supply

1 Answer

No audio, no video

Most likely the power supply. In most models, if the lamp goes out you will still get sound. However, the power supply is not a single piece swap. I would suggest getting a voltmeter, and check the voltage where the power cord meets the power supply. Then follow the circuit pathways, checking after each component, until you find a break in power. You are getting power to that light, so some power is getting through. However, the light works on much less voltage than the rest of the television, so probably there is a capacitor or transformer that's gone out.

Sep 04, 2007 | Hitachi 61SDX01B 61" Rear Projection...

1 Answer

Rca lcd tv power surge lighting

The power supply is a likely place to find what's causing the problem

Jul 11, 2013 | RCA Projection Televisions

1 Answer

Our electricity went out for a few minutes, and since then the TV will not turn on. The green light is flashing. We tried resetting it by pushing a pen point into the reset hole, but it does nothing. ...

Your power outage may have been caused by a nearby lightning strike, or any number of
1000 different reasons that cause power surges, brown-outs, voltage spikes, inductive loading,
and/or utility pole breaker trips and resets (this accounts for your power loss (a pole breaker trip),
followed by restoration of power (the pole breaker automatically reset) - even plain old high electrical demand causing an overload due to air conditioning demands caused by hot weather.
When the pole breaker reset, your TV caught a power surge.
Whenever a power outage occurs, quickly power off (or better, unplug) any/all computers, TVs,
etc. that are not protected by surge-protection.
As an electrician, when someone loses an item of electronics concommitant to an electrical
anomaly, its almost
always traceable to a nearby lightning strike (or the power company provided equivalent), accompanied by inadequate surge protection for
the VCR/TV/Computer/Stereo/uninsured valuable electronic item/XBOX 360/Nintendo Wii.
Surge protection can
be provided by the consumer at the power strip (a good one with builtin MOV protection and a
warranty costs $20, whereas a zero-protection 4-outlet or 6-outlet power strip will cost $4-$5).
Your electrician can provide whole-house surge protection where a whole-house MOV-based (metal oxide varistor) surge protector, or per-circuit protection can be installed with
a GFCI breaker (or better, an AFCI breaker) can be installed.
GFCI = ground fault circuit interruptor
AFCI = Arc fault circuit interruptor
Lightning protection is especially important in Florida, which is the "lightning capital of the world."
I've never found a good solution to lightning-fried electronics (random power supply components are destroyed and/or fuse blown), other than renters insurance or homeowners insurance.

Your only real hope for an economical fix is to look for a blown fuse, and replace it.

If desperate to attempt a fix on your own, you could try replacing the entire TV power supply as a module, but even this provides
no guarantee of a fix - lightning damage can extend beyond the power supply.
When traveling, I will always unplug everything before I leave (except the security system),
and also turn off the breakers to unneeded house circuits (which kills the wall switches that
control interior lighting - forcing a burglar to use their flashlight instead of interior lighting)
which is the least convenient lightning protection, but highly effective, and cheap (free).

Sep 05, 2011 | Mitsubishi WS-55511 55" Rear Projection...

1 Answer

The kids left the tv on all night and turned off in the morning. Next time we tried to use it, we had no picture (blank screen) and no sound, but the power light does come on. Where can I start looking for...

I don't know of a parts outlet but searching will find this part. I am betting that you blew out the video card itself. This usually happens with a lightning strike or a power surge and a power surge strip you buy from a home center is not what it advertises and will not work. It will be obvious if you pull the back off of the TV and look at the input cards, one of them should be fried. If you find the fried one you can pull it, take off the part number and start looking for a replacement. These cards can be fixed but it will take someone that knows what they are doing and a ton of patients.

Jun 16, 2011 | Mitsubishi VS-70707 70" Rear Projection...

4 Answers

Rapidly blinking green sleep timer light, cannot reset tv. Will not turn on.

The Chassis will need to be sent to Mitsubishi to be refurbished. I would call Mitsubishi at 1800-332-2119 to see if they would help in the repair cost and also to refer a Service Facility local to you to do the work. I would estimate the cost of about 300.00 to 400.00 if Mitsubishi helps with the cost. If they don't, I would estimate the cost to be around 700.00 to 800.00.
I hope this helps,

Aug 25, 2009 | Mitsubishi WD-52525 52" Rear Projection...

2 Answers

Tv after power surge

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.         

May 17, 2009 | Toshiba 65H81 65" Rear Projection...

1 Answer

Panasonic TV model CT 27D10B fried by lightning surge. Where to start looking?

Hi There,

I am unsure as to "where to start looking" means? Do you mean parts to fix it or new TV's?

If you are looking to fix it, you will end up spending a lot more than you prolly want. The surge could have blown a board, Power Supply, fuse, capacitor, transformer or a combination of them all. These TV's are only 27" and if you look on government websites you will see they start the bidding around $5 for the whole TV. If you are looking to upgrade I would suggest balancing a budget that works for you especially with the economic issues going on. 1080p is the latest being talked about, but that doesn't mean it will work for you. I went to Walmart and spend $600 on a Visio HDTV 1080i and I have not had a problem yet (knock on wood). I would not suggest buying a Panasonic HDTV but that is my personal opinion - the majority of issues I have resolved at my full time job came from Panasonic Projection TV's and HDTV. At the same time they were able to shoot out one of first 103" TV's but that just means some tech will have a bigger TV to fix in the future - LOL..

Hope this helps and feel free to rate me..

Happy Holidays..

Dec 24, 2008 | Panasonic Projection Televisions

2 Answers

After power surge my tv (toshiba 52') will not power on

after a power surge if you dont have in on a surge protector it probably fried the main board in the tv so it wont work anymore..woudl probably be cheaper to buy a new tv than to try to repair the one you have now

Dec 15, 2008 | Toshiba 57H93 57" Rear Projection HDTV

1 Answer

Tv will not power up when turned on after a power surge occurred.

Prayfully the fuse inside the tv took a little shock and broke ...if not that would leave the transformer or the board took a surge also but this would also depend on a little more details...

was the power surge damaged?
was tv plug damaged?
does the power surge still work (if it wasn't damage)
and not all power surges are power surges unless it specified of purchase most are like power surges but are only close to and a extended extention cord updated..

if the power surge is damaged or even still works then go have the fuse check and any further damage will also show up on the board it will have a burned part...

Nov 11, 2008 | Projection Televisions

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