Question about Sharp Aquos LC-20B2U 20 in. LCD Television

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Does not turn on. ac adapter is ok.

TV does not turn on. I have check ac adapter and it's ok.

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  • Andrea Edwards Mar 14, 2009

    I have a Sony Aquos 2002 model that just quit. The power cord shows electricity. Where would we purchase a fuse?

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I've been there I think.... You probably blown a 2 amp fuse inside on the DUNTKB128DE03 board. You are having a power issue inside and may need to replace the board. Check the fuse first.

Posted on Dec 25, 2008

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Plugged in and not charging


1) Use a multimeter, check the AC adapter (Charger) for power.
Make sure it is putting out the required voltage.

Have an assistant gently wiggle the cable FROM AC adapter TO laptop. See if there is an intermittent reading on the multimeter.

Have an assistant gently wiggle the power cord.

An intermittent reading on the multimeter indicates a broken wire.
Power cord is bad? Replace cord.
Cable from AC adapter to laptop is bad? Replace AC adapter.

If you have posted the laptop manufacturer NAME and MODEL NUMBER, I could have given you more than generic information.

Model Number is in the Bottom of the laptop. Post back in a Comment.

AC adapter works OK?

Check the DC Power Jack.
The DC Power Jack is the jack on the laptop, that the AC adapter plugs into.

DC Power Jack checks OK, this is your problem,

http://mayohardware.blogspot.com/2010/04/important-parts-on-dv6000-and-dv9000.html

Regards,
joecoolvette

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This could be an AC adapter problem.Use another same rating adapter for teating.Check your ac adater volt and ampere at output terminals using a good quality digital multimeter. If OK, check the battery also. Then only suspect motherboard and power jack. Hope this helps

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The power light is off The charger is OK with 19Volt The connector is OK and somehow there is a problem with in the power


remove the battery, connect the ac adapter and turn on the laptop. If it turns on then it's your battery. If it doesn't turn on then it is either your ac adapter, your dc jack, or your system board.

If it doesn't turn on then try a different ac adapter from your local pc shop or electronics store. If it still doesn't work then try moving the ac adapter connector and see if it attempts to turn on. If it does then it's your dc jack. If it is your dc jack then you will have to replace it. The problem with that is that it can be pretty expensive to replace it.

The way I have solved this is by ordering a dc jack on ebay or any other online parts supplier and replacing it myself. If you can take your computer apart and put it back together then it's just a matter of desoldering and soldering the new one. If you want you can have a pc or tv shop do the soldering for you.

Have fun and let me know if you have anymore questions.

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2 Answers

Totally dead, replaced ac adaptor, which was dead too, did not help. still dead.


Hello, I am thinking that your battery needs to be replaced as well. Possibly because of the stress it took from your ac adapter issues. So, to check to see if the issue at hand is now your battery... 1) UNPLUG THE AC ADAPTER FROM THE LAPTOP. 2) REMOVE THE BATTERY. 3) PLUG THE AC ADAPTER BACK INTO THE LAPTOP 4) TURN IT ON.
If the battery was now the issue, your laptop should have turned on at this point.. If it did NOT turn on, then there is a different issue that we should troubleshoot. Let Me Know, ok?

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Great job on checking the power from AC to DC adapter. Also, make sure to plug the printer straight to the power outlet in the wall, bypass any surge device or power strip. Unplug and replug the power adapter in the printer, make sure it's properly secured and in the right position in the slot. Press the power button if needed. If this doesn't help at all, I strongly suggest you contact Lexmark Technical Support to further investigate the problem. I hope I can assist you more on this matter.

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1 Answer

It just wont turn on i have checked the power lead and its ok its an acer aspire 5050 laptop


Hi. I would suggest you double check the ac adapter if the powercord is properly attach to it ot also you might want to try powerdraining or powercycling your computer. To do this you must turn off your laptop then remove the battery and unplug the ac adapter then press and hold the power button for 20 seconds while the battery and ac adapter is out, after that place back the battery and plugin the ac adapter and try turning on your laptop, if this doesnt work then try power draining it again and just use the ac adapter or just plug it in without the battery then try again turning it on. If it still has the power issue then try a known good ac adapter so that you could double check that it is not an ac adapter issue or a battery issue. If all that trouble shooting step doesnt work then you could also try calling acer tech support to help you on your issue if your machine or laptop is still under warranty they would help you fix it by sending that laptop to there depot without any charge. Hope this Helps

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1 Answer

My Toshiba L10 will not switch on the power supply is ok and plugged in and there is a blue light on to say power cord is connected but still will not power up, any ideas?


Do you have a known good ac adapter to try it with? Or is that ac adapter you were saying lights on powering on a different computer?Try to test both to check the functionality of the ac adapter and the port. If ac adapter will work with a different pc, then possibly the port is damaged. You may need to replace the motherboard. If still it wont turn on, then you may just need to replace the ac adapter.

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1 Answer

Hello my name is greg and we were having trouble with our electricity and we shut off the wrong sircut breaker and now our WII doesnt turn on but we are unsure if it is the power cord


The best way is checking the power cord with voltmeter or some unit like charger for mobile phone (plug it and look the phone charging).If the power cord is OK plug the Wii AC adapter.If Wii not turn on check the AC adapter with voltmeter.If working the problem is in your Wii console and it need repairing.If AC adapter not work just buy new.

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Battery charger not working. Power adapter checks out ok. Laptop operates on battery only. 7325gz.


if it is not charging the battery will go dead.soo recharge it if it doesnt work then it could possibly be your charger.but alot of times the soldier on the input plug becomes loosened and doesnt get a connection. how did u check the chager

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1 Answer

15-inch Phillips LCD FlatTV


It could be the AC adapter. That is easy enough to check with a DMM. Turn on the meter, set to volts dc, push red probe into the hole in the output power jack and touch the black probe to the outside of the same jack. Have someone plug the AC cord into a good outlet(one you know has power). If the adapter is working you should see 12 vdc displayed on the meter. There still could be a problem as I recently found an adapter which displayed the correct voltage with no load but little or no voltage with a load. Testing with a load is a problem if you are not familiar with the procedure. Odds are if you have 12 vdc the adapter is fine and you have a short somewhere in the monitor. If you are handy with tools and feel confident, remove the back of the unit and check the fuses in the power supply. If they check OK you probably can't do much more. Unless you are an electronic tech you will need to take the unit to a shop for repair by a qualified tech. Good luck.

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