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Lightning spike-dead sets

(1)2003 32" JVC TV & (1)2004 32" JVC TV, line fuses not blown, bridge rects and H.O.T. are ok. Possible power supply relay open? Or maybe control microprocessor problems? Or standby circuit problem?

Posted by StGeorge on

  • StGeorge Sep 17, 2007

    Sorry, guys. I'm still working on the problem. I didn't leave you for dead. I have a lot on my plate with my recently deceased father's estate. I had to leave many projects for now. I need to move after 17 years in my house. I will get back to you in a few months.




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If it is relay problem you can make it direct just to check.check power supply output. as you say that eht ok than it due to stand by section of system control mcrpssr.

Posted on Sep 13, 2007


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our tv set need to be serviced. Here are some tips:
1. Open main fuse. The fuse is clean but interrupted. You can try replacing it with one o the same value.
2. Fuse Blown or blackened. Short in the rectifier bridge or in the switching transistor. Out of the power supply: supply line rectifier (100/150V) shorted.


Dynex tv

If your TV dead after the lightning, then your TV doesn't power ON with red light stays on lit you possibly have faulty main board.

If totally no indicator try to replace the fuse on power supply board if busted or blown (it is usually connected directly from power cord.

If the fuse still blown you need to replace the whole power supply board.

please rate!!!

We have PDV42S10, There is no power to TV. The green light does not come on. There is power in socket . Thank you

In most cases, if the main power supply fails, the low voltage supply that provides enough power so the set can receive input from your remote, also lives on to signal problems, often by flashing the power LED in a pattern.

In your case, apparently the low voltage supply is also dead.

This can be caused by both supplies being damaged from a line surge caused by 'dirty' AC power, or a spike from a lightning strike somewhere in your power network.

These spikes can travel long distance so a strike need not be all that proximate to do damage.

If no fuse holder is found on the back of the set, it may be necessary to remove the back panel for access.

If you choose to do this, it is safer to leave the set unplugged overnight to allow any hazardous voltages to discharge.

Look for a separate board or an area which has larger components in it.

These will be cylindrical cases and larger block-like parts.

If there is a user-replaceable fuse in the set at all, it will most likely be in that area.

If this damage was caused by a high voltage spike replacing the fuse may be fruitless and if a replaced fuse blows again, then other circuits have been damaged and major boards will have to be replaced as well.

The cost of reviving a lightning damaged set of any kind can often exceed the cost of replacing the whole set.

Even the most primitive plug strip contains components that afford some protection against this kind of damage but the best protection can be had with a 'whole house' surge suppressor.

These cost ~$200 US and feature insurance against appliance losses up to $10,000.

They require access to the main breaker box, safety precautions and a few tools for installation.


My TV we belive was affected by lightning. The TV was connected in a small Monster surge protector with a VCR. The VCR was unscathed but the TV will not power up or turn on. I read there could be a fuse...

There has to be some form of a fuse that is in the AC power line, it may be a square ceramic fuse or a regular cartridge fuse, chances are its blown if the set is dead after a lightning storm, unfortunately if you replace it there is a really good chance it will blow again, if it does then the rectifier diodes would be shorted and need replacing or you could replace the power supply if your unable to repair it yourself

Wont come on house was struck by lightning now everything comes on but the tv

Open the television and follow the power cord to the main power supply board the fuse will be near this cords contact plug check for blown 5amp fuse, if fuse is not blown then power supply took a shock and needs repair.

No power

unplug the unit for 24 hours and try it again. if the unit doesnt come on at all, even after that, then the internal fuse is blown, or a power spike / surge has friend part of the internal power supply. you'll have the go through the warranty process of the manufacturer, or find a local tv repair shop.

My Philips 20' TV Dead condition

If you still haven't thrown the set away . . . The ticking noise can come from different sources; either a relay that is tripping so the set doesn't burn your house down, or the horizontal output transistor is shorted shutting the set down, or there are failed components in the power supply.
I'm not sure which 'line transformer' you suspect but it isn't a likely place to look for this problem.   


Hello gladwin6,

You may have at least a blown fuse. However you may also have other damage to your power supply. This often happens due to the voltage spike caused by the power coming back on suddenly. You can check to see if the fuse is blown, however once you change the fuse and if this does not take care of the problem, I would suggest that if you do not have a background in electronics, that you have a qualified technician take a look at your TV set.

I hope this helps,
Thank you,

TV Doesn't Work

Probably just a blown fuse. You can go to and download Photofact #4918 for this set to get the schematic and troubleshooting tips for $20. Since the relay is not picking up, the fault is probably in the standby power supply and thus you would not be getting any power to the rectifier bridge to begin with. I do not see to many Sanyos and therefore my tech library on that brand is limited and I can't provide more spscific advice. Later!
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