Question about Toshiba 32AF45 32" TV

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Will not turn on

My tv had a power surge from lightning possibly through the cable connection. the fuse was not blown but i did find a blown capacitor-250v1uf near the heat sink. i did replace it with a new one and it still wont turn on. i do have 110v going to the small transformer and when you plug the tv in it sounds like it wants to power up because it will sound like when you turn it on, sounds like static. what should i look for next? thanks!

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Re: will not turn on

The power surges and lighting damages are ussually extensive,alot of times more than one component and more than one circuit gets damage,home owner insurance cover this damages but the insurance company does not repair the damaged unit they replace them because is not worth repairing.To troubleshoot you will need the squematic diagram to locate and correct the different circuits that might be involved ,be careful there are voltages that can hurt you if you are not too familiar and touch one by accident.

Posted on Nov 05, 2006

Re: will not turn on

Q502, R541, D523 along with the cap you replaced should cure the problem...

Posted on Jan 24, 2008

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After a lightning storm, my TV will not turn on. Is there a fuse or something on the in coming power that may have blown causing it not to turn on?

Any TV subjected to a power surge will have problems. If you can remove the back cover, do so. Locate the glass fuse. In the best situations the fuse is clear and opened, and replacement will repair your TV. In worst cases the fuse may be blackened, and you will see that many components are burned and shattered. If this latter is true, only replacing the TV is your best bet. In many cases electronics may be connected to surge protectors, but lightning will over ride these devices and cause damage. I have seen this happen many times.Thanks for asking and show all hands of support!

Jun 23, 2011 | Sanyo AVM-3659S 36" TV

2 Answers

Will not power on

This symptom caused by shorted (HOT) Horizontal Output Transistor,change this transistor,so it will power on again..

hope this may help;


Jul 30, 2008 | Zenith B13A02D 13" TV

1 Answer

This morning I tried to turn my RCA TV (model 24R411T) on and nothing happened. I tried plugging it into a different outlet, still nothing. I tried leaving it unplugged about 10 minutes and trying again,...


Power surges or nearby lightning strikes can destroy electronic equipment. However, most of the time, damage is minimal or at least easily repaired. With a direct hit, you may not recognize what is left of it!

Ideally, electronic equipment should be unplugged (both AC line and phone line!) during electrical storms if possible. Modern TVs, VCRs, microwave ovens, and even stereo equipment is particularly susceptible to lightning and surge damage because some parts of the circuitry are always alive and therefore have a connection to the AC line. Telephones, modems, and faxes are directly connected to the phone lines. Better designs include filtering and surge suppression components built in. With a near-miss, the only thing that may happen is for the internal fuse to blow or for the microcontroller to go bonkers and just require power cycling. There is no possible protection against a direct strike. However, devices with power switches that totally break the line connection are more robust since it takes much more voltage to jump the gap in the switch than to fry electronic parts. Monitors and TVs may also have their CRTs magnetized due to the electromagnetic fields associated with a lightning strike - similar but on a smaller scale to the EMP of a nuclear detonation.

Was the TV operating or on standby at the time? If it was switched off using an actual power switch (not a logic pushbutton or the remote control), then either a component in front of the switch has blown, the surge was enough to jump the gap between the switch contacts, or it was just a coincidence (yeh, right).

If the TV was operating or on standby or has no actual power switch, then a number of parts could be fried.

TVs usually have their own internal surge protection devices like MOVs (Metal Oxide Varistors) after the fuse. So it is possible that all that is wrong is that the line fuse has blown. Remove the cover (unplug it first!) and start at the line cord. If you find a blown fuse, remove it and measure across the in-board side of fuse holder and the other (should be the neutral) side of the line. The ohmmeter reading should be fairly high - well certainly not less than 100 ohms - in at least one direction. You may need to unplug the degaussing coil to get a reasonable reading as its resistance may be 25 or 30 ohms. If the reading is really low, there are other problems. If the resistance checks out, replace the fuse and try powering the TV. There will be 3 possibilities:

It will work fine, problem solved.

It will immediately blow the fuse. This means there is at least one component shorted - possibilities include an MOV, line rectifiers, main filter cap, regulator transistor, horizontal output transistor, etc. You will need to check with your ohmmeter for shorted semiconductors. Remove any that are suspect and see of the fuse now survives (use the series light bulb to cut your losses - see the section.

It will not work properly or appear dead. This could mean there are open fusable resistors other defective parts in the power supply or elsewhere. In this case further testing will be required and at some point you may need the schematic.

Jun 14, 2010 | RCA 27R411T 27" TV

1 Answer

We had a near lightning strike and now my tv (sanyo model ht27744)doesn't want to come on.

Lightening may have caused a surge on your power lines to the house and to the outlet the TV was on.
Do other things work on that outlet? If not you tripped a power breaker.If they do work check this.
Unplug the TV for 2 min or more and plug back in.
Try bypassing your surge protector you had it plugged into. It could have died when the lightening struck.
(no surge protector?) Bet you'll buy one for your next TV.
Look for 3000 joules and up rating for a surge protector and insure it has protection for a cable/antenna input too.
If this doesn't work the TV may be fried or internal fuse blown.
Time to take it to a repair shop or depending on it's age (5 years+) it may be time to buy a new TV and surge protector.
Near Lightening strikes can effect appliances from several inputs that could be affected from outside like Power, Cable, Antennas, Phone Lines that come into your house.

Jul 06, 2009 | Sanyo Standard (CRT) Televisions

1 Answer

Sanyo 25" TV struck by lightning - where do I begin?

Not to different from arcade, If the fuse is blowing right away check the bridge rectifiers next for shorts and anything on the primary ac to dc side first, Caps,may have a surge suppressor on the ac side. If it was lightning sure you will find it in this area. Secondary supply shorts usualy do not blow fuses, Just cause the supply to shutdown.

Jul 10, 2008 | Sanyo DS32224 TV

1 Answer

Won't turn off...constant hissing...blank sreen

Sounds like a power surge likely followed the outage- or maybe you were actually hit by lightning- and since this set did not have a built-in kill-switch (circuit breaker) it could have very well caused some significant damage. Check the internal fuses, if they are blown, chances are, so is the rest of the set. For the cost of repairing something as over-reaching as this, I'd be looking for something new (And be sure to buy a quality surge protector, so this does not occur again!)

Hope this helps in some small way!

Aug 16, 2007 | Memorex MT2274 27" TV

1 Answer

Won't power on after local lightning strike

with a lightning strick any thing can go. check diodes, dc fuse regulator and while U are at it check the horzontal output transistor

Dec 09, 2006 | Sanyo DS32830H 32" TV

2 Answers

No Power to TV

There is no reset button on these new sets,your set has complete power problem since you have no lights no clicks,this might have happen because of lightning or power surge,either one creates a lot of damage,if you are familiar with tv service you can check the main fuse,he should be close to where the power cord comes in,if you find the fuse blown it needs to be replaced with an exact replacement for AMPS rating and VOLTS rating as well as size,if the fuse is blown black we might have more problems ahead in the circuit and it will blow up again as sonn as you plug the tv back in,if it blows again it will need a more involved repair,the problem could be in the primary side of the power supply,if you are not too familiar you should seek the help of a servicer a least for an estimate but if you suspect power surge or lighting damage dont invest any more on this set and get a new one.

Nov 08, 2006 | Zenith C27A24T 27" TV

1 Answer

Av32D104 JVC Television Wont turn on , Has power to light on front that reads "auto timer" what now?

Unplug the tv set for 30 seconds, plug back in and turn set on, if its wont fix the problem, and you're NOT under warranty you should at least open the TV and look for a blown fuse near where the power cable enters the set. A lot of times you can buy replacement fuses at a local electronic or hardware store and they're easy to replace. Check the fuse. If it is blown, it will be obvious and make sure that the set is unplugged before replacing it. If it blows again, or if it is not blown, your problem is probably in the 'X' volt regulator and you will need professional help with the repairs. You can also check the board where the components are mounted and resoled any that look bad. Brief power outages may cause the TV to turn off on its own. If you are using a surge protector, try connecting the set directly to the wall outlet. In your case it could caused by a blown fuse, a leaky diodes or a bad solder joint at the horizontal drive transformer. All can be replaced at a local electronic or hardware store and they're easy to replace If this does not correct the problem, you may need to have your TV serviced. good luck!

Jan 05, 2006 | JVC AV-32D104 32" TV

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