Question about Sony KV-9PT20 9 in. Television

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120VAC dead Works fine on automobile battery 12V circuit, but totally dead on 120VAC.

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There should be a small fuse on the circuit board inside the tv. Sometimes the fuse is soldered direct to the board and not in a holder. Hope this helps you,,, Mechanic

Posted on Jan 18, 2008

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Posted on Jan 02, 2017

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4 Answers

HAVE 110 WHEN PLUGGED IN OR ON GEN BUT HAVE LOST 12V WHEN UNPLUGGED OR GEN OFF.


Do you have 12v when plugged in or on generator? If you do, then it's likely 1) a fuse or breaker for the converter, or 2) the converter is dead. Is your battery good? Try using taking the battery out and using to crank your car or truck. If that works, look at the fuse or breaker for your converter or your converter may be dead. If the batter doesn't work, do the opposite and put your car/truck battery in your RV and see if your 12v works -- if it doesn't, then check your converter fuse/breaker or it may be dead; if it does, then your battery is terminally (pun) dead.

Nov 09, 2015 | Heartland 2013 Cyclone CY 3010

1 Answer

Completely dead laptop.


sometimes you just need to remove the battery then power-up the unit using its charger.

Jul 05, 2013 | Toshiba satellite c660

1 Answer

Totally dead! No light, no nothing! 120vac being applied to circuit board and fuse is not blown but nothing works.


There Hello,
Thereshould be 2 circuits, the vacuum motor and the sealer strip circuit. Of course the sealer strip should be controlled by the circuit board due to low voltage and the vacuum motor is either stepped down to 12 volts or direct 110v. Your best bet is to follow the circuit from source going downstream-testing with a meter for what is present at certain points. There is ,what is called a fusible link in many appliance circuits. It's like or is a fuse that is sealed . Burn out can only be confirmed with a continuity meter. It is wire in-line at power input. Repair by replacement only, requiring soldering or splicing . It should be easy to locate and replace. Good luck - Ned

Mar 18, 2011 | Tilia FoodSaver V2240

1 Answer

I have a Battery Tender 12v 1.25a battery


remember secondary voltage is AC like the primary voltage, only its reduced typically 120vac primary and 12 or 18vac secondary then the ac secondary is rectified using a bridge rectifier to get the 12vdc then a filter circuit is applied to remove any electrical noise.. any way the problem is with the dc voltage side of the circuit and unless you know how to troubleshoot the circuit you will not be able to repair it. my experience says it might be a bad bridge rectifier.

Dec 29, 2009 | Battery Tender Measuring Tools & Sensors

2 Answers

CyberPower UPS - unit fan does not work. Is the


It may not be dead yet. Does it supply output? You have not mentioned. It would be considered dead if it does not give any output. Is the battery fine? If the battery is fine and there is no output then it may be dead.
So, check the battery for any sign of life.
Check the output.
Check output with it plugged into mains.
If all are negative then it is dead.

Nov 15, 2009 | CyberPower Computers & Internet

1 Answer

Bike is totally dead


I would check your main fuse first(the most likely problem).
It is located on the starter relay(should be under the side covers close to the battery)
If this fuse is OK clean up connections on this and battery terminals and check for your 12v at the starter relay.

Come back to me if you have to check further

Jul 27, 2009 | 2003 Yamaha YZF 600 R thunder cat

1 Answer

My car will not start , it is totally dead but all the lights work and the horn works but not a sound when I try to start it. It is a 97 ford escort


Clean off the battery terminals (inside not outside) if the battery has 12v in it it should start...If it dosent, just ask and I'll give you more help with it.

Jul 08, 2009 | 1995 Buick Regal

1 Answer

My boat refrig works on shore power but won't convert to 12v this only started this week


The inverter that converts the 12 volts to 120VAC is not working. An eletronic repair shop can fix this. refrigertor technician will replace the whole inverter, Or you can order the inverter unit and replace it yourself if you are somewhat a handy kind of person. It is not really that hard to replace them. Make sure first that the inverter is not putting out 120VAC when you connect 12V to it, before you take it to a shop.

Jun 28, 2009 | Refrigerators

1 Answer

Navman icn 720 gps will not power on


Poss that the battery is totally dead, and therfore will not power up even when on ac or 12v charger lead. Often the battery is part of the circuit, and if the battery is dead rather than just weak or discharged, then the circuit is incomplete.

I posted on here how to remove the battery, you can get a replacement quite easily. Also would be an idea to search out a correct output charger, or maybe borrow one just to determine if the problem was with the battery rather than a blown unit.

Good Luck

Feb 16, 2009 | Navman iCN 330 GPS Receiver

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