Question about Dell Latitude C640 Notebook

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In power adapter, blink the LED (adapter ADP70EB) and laptop is not powered. If laptop is not conected, the green led of ADP light normal ...

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I guess first problem is Adapter Power can not established to run laptop.Or fault your laptop motherboard power regulator circuit .Repair it and check Adapter other laptop.

Posted on Dec 04, 2009

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How do i fix a problem of green power led continuously blinking in Hp compaq nc6320 laptop even when the battery is removed and the motherboard is outside the case?


HP Notebook PCs - Troubleshooting LED Blink Codes or ...

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Feb 03, 2016 | HP Computers & Internet

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ADP CUHN45a-4 wont light


It is likely that either the igniter or the gas valve will have to be replaced

Dec 09, 2013 | Star Enerco Heat HSU45 Garage Heater 45000...

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When ac adapter is plugged in, only AC led blinks green, (no batt, no ram, no HDD) and after pusshing the power button several times, power led blinks greeen for a split second, and the computer never...


Try using another ac adapter, sounds like the adapter is failing. You can either ask if one of your friends has the adapter with the same connector and voltage (check that the wattage of the adapter is sufficient) or if someone has a universal ac/dc adapter for the test. If the laptop starts normally wiht another adapter, then get a replacement adapter and you are good to go.

Oct 10, 2013 | Toshiba Satellite L455D-S5976 Notebook

1 Answer

Dim green light on power supply blinking


If the Power supply LED dims and flickers its either your motherboard circuit has been cut or there is a short in the laptop. The AC adapter is not the cause.

Try this:
Remove the battery, then press power button to drain all the current, then re-install battery and plug to adapter.

If that doesn't work, then it's most likely the motherboard.

Mar 19, 2012 | ASUS (X83Vb-X2) PC Notebook

1 Answer

When you press the start button nothing happen not light or start up


First remove the battery and put it back in, you want to make sure it has a good connection.

Next you want to check the power adapter. If it has a built in LED light, it should turn green when plugged into the wall. If it does have a light and the light will not turn on or it blinks, replace the adapter. Next, plug the adapter into the computer, does the LED light change? Example, the LED light was a solid green, when you plug it into the computer it blinks. If the light does something along those lines, then there is a problem with the laptop itself.

If the power adapter does not have an LED light, then you need to use a Multimeter to check if the adapter outputs the right amount of power...which should be around 12 volts.

If the battery and power adapter pass the tests, then you are looking at a hardware issue in the laptop. From your description of the problem, I would guess the motherboard has died or that the charging jack on the motherboard came loose and needs to be replaced or re-soldered.

Two things that would stop the light from coming on, No Power or Motherboard is broken.

May 02, 2010 | Toshiba Satellite M45-S169 Notebook

1 Answer

Compal RM CY25 Laptop. new battery won't charge.


Unfortunately, the charger socket in the motherboard does not drive electricity to the battery to get re-charge it. It is a typically motherboard problem(Do not confused with a power jack problem). I can not be repaired it.
Two options work always hook with power adapter or get ride of her.

Jan 30, 2010 | Computers & Internet

1 Answer

Toshiba A75 - S209 Power LED Blinks non stop, no boot


Here are some troubleshooting steps. From your description, my impression is a bad motherboard.
http://www.fixya.com/support/r3581893-how_to_troublehoot_a_portable_compouter_

Jan 13, 2010 | Computers & Internet

2 Answers

My Laptop doesnt start at all . I dont know what


1. remove all ext peripherals
2. remove battery
3. check first the ac adapter if it has led on (make sure ac adapter is not connected to the laptop)
4. try any other wall socket check if ac adapter will led stay on
5. if ac adapter stayed on then connect to laptop (without the batter)
6. after connecting the ac adapter to laptop check if the ac adapter led turned off, if yes then check ac adapter laptop pin on the side if is loose or damage.
7. if ac adapter stayed on after connecting to laptop press now the power button on the laptop just once. check if the power led on laptop will turn on (check if power led stays on or it blinks amber)
8. if it blinks amber then remove all CRUs such as dvd drive, memory, hard drive and wireless cards. put them back one at a time. make sure you turn off laptop when putting removed hardware. this will check and isolate which causing the power led to blink.
9. if the power led stays on then turn it off again then wait a couple of seconds then press and hold on Fn key then press power button. wait for about 5 minutes while the power led is steady on, until you hear beeps once you hear beeps it means that LCD has problems. try then connecting laptop to an external monitor if it shows display there. press on Fn + F8 to toggle the display from LCD laptop to the ext monitor. if no display replace the motherboard. if it has display replace LCD.

Oct 15, 2009 | Dell Inspiron 6000 Notebook

1 Answer

Laptop won't power up dies in the middle of movie-won't power up


You would probably be better off buying a new notebook. Not sure how tecnologically advanced you are but it seems you already did the troubleshooting yourself. But i am very interested in the a/c adaptor output. If the led on the adaptor is green that just means that it is getting power from the wall.

What did you mean by fluid leaking out?

It could be the mobo (motherboard) or it could be the connections from the power to the machine. If you want to put a new mobo in I have to warn you that taking apart a laptop is VERY difficult and I do not recommend this unless you are a PRO. This is just about the only link i can find to buy a new board. If you google your laptop model you will find out you definately are not alone with this problem

http://www.notebooksolutions.ca/zc/index.php?main_page=product_info&products_id=1183

Please don't forget to rate my response and let me know if there is anything else I can help you with.

Jan 08, 2009 | Computers & Internet

1 Answer

Laptop crashes shortly after boot, power light rapidly blinks red.


Its late, so just to make sure I'm not brain-dead basically your laptop runs fine as long as its powered by the AC adaptor but dies fairly quickly while running via battery. This is very typical of a battery that will no longer hold a charge, not normally a user repairable item. It could also be that the charging electronics (in the laptop) isn't charging the battery, again not a typical user repair job. About your only option short of taking it to the repair shop is buying or borrowing a battery as a test.

Dec 12, 2006 | Medion (40010998)

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