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Replace capacitor Adapter Over heat

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This problem occurs when adapter is too old. Now you need to change the adapter and buy new one not used.

Posted on Jul 25, 2013

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Toshiba laptop power on light bling after not on


When you connect the power adapter into the laptop, does the power LED light up? If not then - The battery adapter or the adapter's power lead or the laptop's power socket could be faulty. Check power adapter's DC plug that connects into the laptop power socket with a multi-meter, the voltage should be slightly higher than the voltage that is printed on the label on the bottom of the adapter. If the voltage is zero or way below the voltage that is printed on the label then the power adapter is faulty and needs to be replaced. If the adapter is OK then connect it to the laptop and power it up, then look at the power/battery charging LED light and wriggle the power plug in the laptop's power socket. If the power/battery LED light flashes and in a certain position this LED light stays firm, then the power socket is either faulty or it has a dry solder joint where it is connected to the motherboard. This can be repaired but it requires the laptop to be completely dismantled to get at this power socket and repair. If you cannot DIY then I suggest you get a quote first.

Mar 28, 2013 | Toshiba Computers & Internet

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I had a HP dv7-4165dx laptop that does not turn on I replaced the power socket because it wasn't working. And the power switch because I thought that was wrong with it. But still it does not turn on....


With these replaced;

1) http://www.amazon.com/Genuine-Harness-Pavilion-DV7-4000-Series/dp/B008LDTVJ4/ref=sr_1_9?ie=UTF8&qid=1350516570&sr=8-9&keywords=dv7-4165dx

2) http://www.amazon.com/Hp-Power-Button-Board/dp/B0045719EK

,and the AC adapter producing 19 Volts, with no fluctuation on the multimeter, when you wiggle the power cord TO AC adapter, and cable from AC adapter to DC Power Jack;

The problem is Power MOSFETs in the motherboard power section, and/or ceramic capacitors.
(MLCC ceramic capacitors)

Showing average price of Power MOSFET used in this type of application, and using a Fairchild Semiconductor - FDS6679 -
for an example,

http://www.mouser.com/Search/Refine.aspx?Keyword=FDS6679


Scroll down. 1 each = $1.01

Average price of MLCC SMD ceramic capacitor,

http://www.mouser.com/Passive-Components/Capacitors/Ceramic-Capacitors/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT/_/N-b2cj?P=1z0wrk9Z1z0t6fg


http://www.youtube.com/watch?v=3NN7UGWYmBY


http://www.youtube.com/watch?v=f_yFDpSTfao

http://www.youtube.com/watch?v=MqivHi7Qjvk


For additional questions please post in a Comment.

Regards,
joecoolvette


Oct 17, 2012 | Computers & Internet

1 Answer

Sanyo EM-SL40S microwave everything seems to be working fine but food doesn't get hot?


see this causes and fix it. GOD BLESS YOU
Power Diode

A diode is an electronic component that readily passes current in one direction only and blocks the flow of current in the opposing direction. If your microwave's diode has become defective, your microwave will not heat and you will hear a buzzing noise. Test the diode to determine if this is the cause of your problem. Replace it if it is defective.


High Voltage Capacitor

A capacitor is an electrical device which stores electricity. A defective capacitor may be why your microwave is not heating but you are hearing a buzzing or humming noise. The capacitor will have to be tested to determine if this is the cause of your problem. A defective capacitor will have to be replaced before your microwave will work again. Make sure you discharge the capacitor before you test it, though.


Magnetron

A defective magnetron is the third possible cause of why your microwave is not heating, but you can hear a buzzing noise. Test your microwave's magnetron. Replace it if it is defective.


Thermoprotector If the microwave doesn't heat the thermoprotector may have tripped. This is a safety device to prevent the microwave from overheating. It can be tested for continuity to see if it's blown.

Main Control Board If the microwave doesn't heat the main control board may be defective. This is not common. When a microwave doesn't heat the problem is usually within the high voltage circuit; either the high voltage capacitor, diode, transformer or magnetron.
High Voltage Transformer If the microwave does not heat, the high voltage transformer might be burned out. Microwave ovens produce a very high voltage in order to power the magnetron antenna, which emits the energy that cooks the food.
10_2_2012_12_38_27_pm.jpg10_2_2012_12_38_56_pm.gif

Oct 01, 2012 | Microwave Ovens

3 Answers

My N64 console keeps on resetting its self at the intro of the games. If there was an error in the system what would it say then?


Well if the red light is flickering then that means that you either have a bad capacitor in the console or the ac adapter might have a bad capacitor or its over heating but if the light is not flashing then it means that the software is going bad on you. SO an N64's internal parts are similar to a computers parts but a simple software then and computers have an adavnace software advance means i can do more things so when an advance system resets it can fix its self. So a simple software will just keep on reseting and never get past the reset stage. So if there is an error in the console it should show you on the screen before it resets but sometimes i doesnt.

Mar 21, 2012 | Nintendo 64 Console

1 Answer

Something went pop and them the power went out and won't power back on?


Most probably a capacitor exploded either in the AC adapter or on the laptop's motherboard. In order to find out where the damage exactly happened, you can either test your AC adapter with another similar laptop, or test a new AC adapter with your laptop. Alternatively, you can test the output voltage from your AC adapter using a voltmeter.
If the AC adapter turns out to be working properly, then the damage happened on the motherboard. You will need to disassemble the laptop to get access to the motherboard & inspect it. The exploded capacitor could be replaced with a new one to fix the problem.

Jan 12, 2011 | HP Compaq nx6110 PC Laptop

1 Answer

Microwave won't heat, light ,clock works the microwave just won't heat the items in it.


hELLO THERE
when a microwave quits heating but every thing else is ok normally
investigate these 4 areas

Investigate these three areas if your microwave won't heat but you hear a loud buzzing or humming noise:
microwave_diode.jpg Power Diode

A diode is an electronic component that readily passes current in one direction only and blocks the flow of current in the opposing direction. If your microwave's diode has become defective, your microwave will not heat and you will hear a buzzing noise. Test the diode to determine if this is the cause of your problem. Replace it if it is defective.

picturena.gif High Voltage Capacitor

A capacitor is an electrical device which stores electricity. A defective capacitor may be why your microwave is not heating but you are hearing a buzzing or humming noise. The capacitor will have to be tested to determine if this is the cause of your problem. A defective capacitor will have to be replaced before your microwave will work again. Make sure you discharge the capacitor before you test it, though.

microwave_magnetron.jpg Magnetron

A defective magnetron is the third possible cause of why your microwave is not heating, but you can hear a buzzing noise. Test your microwave's magnetron. Replace it if it is defective.

Nov 09, 2010 | GE Spacemaker JVM1640SJ Microwave Oven

2 Answers

Have a dell inspiron 1525 that will no longer charge, replaced battery, charger and power adapter card in laptop. What can problem be - read that it can be some capacitors. Where are they and how do I...


Tom
i have inspiron 1525 as well ... if the computer wont boot up, then the mainboard may have experienced a power surge of excess current. did you have t-storm or power out while your computer was plugged in with Ac adapter ?

if not , to answer your question, the capacitors you inquire about are so small, it would require special solder machine to replace these CAPACITORs, as they are very tiny in size and require absolute temperature (heat) from solder gun to pally appropriate solder to replace the capacitor(s).

i think your mainboard is gone.

if i can be of further assistance, please let me know-- i can help

Nov 02, 2010 | Dell Inspiron 1525 Notebook

2 Answers

Toshiba m60 will not power up - power supply is


If you know for sure the ac adapter is okay and the laptop won't turn on then its got to be the motherboard that is bad cause that is where the power goes thru to start.

Take out the battery and only hook up the ac adapter and see if the laptop will turn on then, if it does then that means the battery needs to be recharged up or bad if it won't charge up.

If you take the battery out and the laptop still won't turn on then you know for sure motherboard is bad.


Jan 06, 2010 | Toshiba Satellite M60 Notebook

2 Answers

Will not power on


Is this monitor supplied from AC outlet straight or through AC-adapter? If through adapter check the voltage on DC connector. If straight, then you need to open monitor and check fuse, located on the power supply PCB, carefully, don't get electrocuted, because in some models the large capacitor in the switching power supply may hold the charge for long time.
If fuse is ok, take a look over all electrolytic capacitors on the power supply board, are there any of them blown or even just little bit rounded on top? If yes, replace them with proper ones. Also take a look at solder side of PCB and carefully check if there are some cracked junctions, especially at power diodes, heat-sinked transistors, power resistors and pulse transformer - as far as these parts are heating more than others. Described steps can troubleshoot half of all problems in LCD monitors.

Aug 17, 2009 | HP Vs17 17" LCD Flat Panel Monitor

2 Answers

Toshiba Satellite A105-S4048 problem with AC Adapter When I turn the laptop on with the AC adapter, after checking the BIOS freezes and does not boot Windows. If I turn the laptop in only with battery boot...


There's not much you can do. The problem is definately with your motherboard. I'd recommend a bios update, but normally you can ONLY run a bios update if the battery and the ac are both plugged in.

This problem is pretty common among Toshiba's A105 and P105 models.

Besides replacing the motherboard there's not much you can do.

Sorry.

Mar 10, 2009 | Toshiba Satellite A105 Notebook

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