Mitsubishi WS-55859 55" Rear Projection Television Logo

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Posted on Oct 04, 2009

Screen will not turn on. may have had power surge in house. Suspect power supply burned out.

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I have a lg 65lb5200 tv that sometimes i turn it on and it has no picture.

It seems to me the tv is not getting enough power to turn on. make sure the tv is pluged into a surge protector and then to the wall. no power strips with other things pluged in. all by itself to the plug. you always want to put a surge protector on all the small and big electronics for if you do not if lightin come in it would burn everything up. you might have had ligting come in and that is why some of your stuff is having problems now. if you own he home get a whole house serge protector. it will save you in the long run becuase if there is surge from the power company or from lighting then all your stuff will be protected.
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Replaced entire power supply board on our lg tv because the capacitors had gone bad. Now the tv comes on for a few seconds then turns itself off. Any ideas?

You always want to put a surge protector on all the small and big electronics for if you do not if lighting come in it would burn everything up. You might have had lighting come in and that is why some of your stuff is having problems now. If you own the home get a whole house surge protector. It will save you in the long run because if there is surge from the power company or from lighting then all your stuff will be protected.
It might be too late for it seems lighting has already got to it. We have had some pretty bad storms and if you do not have surge protection then that is what is wrong it is fried.
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I replaced the power board with one from shop jimmy but still get no power/stand-by light at all. i can heard a very quiet rhythmic clicking from what sound like the power board.

1. Do you use a TV antenna like the outdoor or a Dish ?
2. Do you have power lines that supply to your house overhead or completely underground ?
3. Did the fuse at the house blow when you had the lighting power surge ?

If your answer is YES+ANY+YES - your logic board could also blown.
If your answer is NO+Underground+YES - your logic may not be damaged.

As Tom suggested, look for other obvious burnt components or even smell closely to confirm (if you have a nose for it :-))

also check the video below
How to fix tv after lightning strike power surge
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Today my power went out for a split second and came back on I turn my TV back on it makes a high pitched whining noise and the screen wont turn on. Cant add picture but model number is MW30G71.

unplug your tv. let it sit for a good bit. 1/2 hour did your power just go out or did you have a power surge then no power. surges cause the grid to go down for a second too and that causes problems too. surge protectors are good for everything. also are you on cable? if so have the cable company check they're filters into the house may be an issue but check the tv after a half hour unplgged and then plug in and turn on normally? sometimes it needs a reset time period before the fuses inside will reset themselves.
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We just had a lightning storm come through which knocked out the power. Once the power came on we tried turning on our sanyo LCD 24k40 tv it wouldn't come on. How do we fix it

I've checked on line for a schematic of this TV but was unsuccessful but I suspect it is one of two problems.
1) A fuse inside the TV was blown from a power surge caused by the storm. If you can locate it pull it out and look to see if it looks blackened (even a little) or if the wire inside is broken. This would indicate the fuse did it's job and stopped the power from burning out the whole TV. All of these fuses are available at your local electronics store or Radio Shack if you have one nearby.
2) The power supply on the TV was hit by the surge and burned out. There is no simple solution to this problem as the power supply would need to be replaced and the only way to do this is to hire a qualified TV repair service. If you happen to be good at soldering and understand electronics you could do this yourself after buying the power supply on line. I checked online and the part is about $60-70 USD.
There is a possibility that the power surge could have fried one of the circuit boards and if that's the case then you would have to weigh how much you want to pay to repair the unit after having a repair service estimate the work. I feel pretty strongly that you have one of the other two issues I listed since you didn't mention any other items in your home that were damaged at the same time. If there were more items then I would suspect the power surge would have been much more massive and likely caused considerable damage but since not then the damage would be minor leading to my previous conclusion.
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My power went out in my house and when the power was restored my computer would not turn on...there is a blue flashing light in the back of the computer.

The blue flashing light is probably on your power supply. I suspect that the power supply was subjected to a voltage surge during your power outage. It may have damaged your power supply (or possibly other components in your computer)

Try unplugging the power supply from the wall socket and leave it unplugged for at least 5 minutes. Then plug it in and see if your computer will turn on. If it will not, you require the assistance of a PC technician to test your power supply and computer.

You should connect a surge protector or UPS (Uninteruptable Power Supply) to your computer to prevent this from happening again.

If you have any additional questions contact me by clicking on the "Add a comment" link located under your problem description on FixYa. Also, if you believe that this information was helpful to you, please return to the FixYa website and rate my response to your question.
Best regards,
Yavacotech
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TURNS ON AND OFF IMMEDIATELY . HEARD POPPING AND SMELLED ELECTRICAL BURN BEFORE 1ST TIME

More than likely a burned power supply. The acrid smell is a giveaway for high powered components failing. If it were a conventional CRT type screen, I would suspect the flyback transformer, but LED/LCD type screens will eat a power supply if it has the slightest defect in manufacturing.
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Computer won't turn on won't do anything , i had it connected and someone at my house was using electric drills and the fuse tripped and everything was shut down including my computer and since then it...

Try unplugging the computer completely from the wall for 15 minutes. Plug it back in, and see if it will power on.

If it doesn't it's most likely a blown power supply, when the breaker tripped, everything on the circuit basically fed back into everything plugged in. This is something most computer power supplies do NOT like.
The good news is, a power supply is generally pretty cheap, you can get new power supplies atarting around 20 bucks, although decent quality ones are closer to 50 bucks. Bad news is, there is about a 1 in 20 chance the power supply took other parts with it.
Once you do get it running, or get another computer, make sure to get a surge protector strip and plug everything connected to the computer into the surge protector. A 15 dollar surge protector can save you 150 dollars in parts and labor. (or more)
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Zenith R56W36

your main power supply has been burned out. make sure all electronic are protected by a surge protector in the furture
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Sony Projection TV 60 XBR, wont turn on, blinking green light

This sounds like when the power came back on a surge went into your tv and burnt out the TVs main power supply or possibly burn out the flyback power converter on the TV main board!
(I am pretty sure it is either one of these things!)
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