Question about Acer Aspire 7720 Notebook

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Power problem I discovered after my laptop completely shut down that my cat had chewed my power cord, i purchased a new ac/dc adapter and it still is not able to turn on. could it be my battery? or could it have shorted out anything welse inside?

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I don't think you are dealing with a short in your system. Your battery is probably dead and/or needs to be charged. See if your new power cord will work and will turn your computer on. Make sure that you have the exact power cord that your specific system calls for, because not all laptop power cords are the same. I mean you can't just use any laptop power cord; it has to be one that is rightly built specifically for your laptop system.

Posted on Sep 05, 2008

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Samsung notebook N150 Plus has gone completely dead


Try another AC outlet, try another cord/charger of the EXACT same power spec. Has the AC jack in the computer been damaged by pulling on the cord? Power surge? With a multimeter, verify DC volts at ac cord plug. Is the Laptop usually left plugged it when not in use? Do you shut it down and unplug when not in use?

Jan 20, 2013 | Samsung N150 Notebook

2 Answers

The adapter light is on when first plugged in but then when I connect the adapter to my laptop the light goes off and it doesnt supply any power


I suggest check out the AC adapter first.

1) When plugged into power, and plugged into the laptop, gently wiggle the cable from the AC adapter TO laptop.

Any change?

Do the same on the power cord TO AC adapter.

NO?
Go on.

2) The port on the laptop that the plug from the AC adapter plugs into, is the DC Power Jack.
If we are discussing an Acer Aspire 5738Z Notebook PC, the DC Power Jack resembles this one, (Not installed),

http://www.batterysupport.com/acer-aspire-5738-jack-p-302046.html

(When I note the DC Power Jack, it is this link I will be referring to )

As you can see there is a Center Pin. All power removed from the laptop, use a small wooden, or plastic object, and see if this pin moves around.

ANY perceptible movement means a bad DC Power Jack.

DC Power Jack checks out it's back to the AC adapter.
Wanted to perform the easy diagnosis first.

This will require a multimeter. An economical, yet fine for this test multimeter, can be purchased for as little as $8 to $12.

Available in a multitude of stores. An auto parts store is but one example.
Analog or digital is fine.

http://www.youtube.com/watch?v=bF3OyQ3HwfU

(Analog is fine. Some of us still like 'em)

DC Voltage is what you are going to check.

Black probe lead (Negative) goes in the Common port on the multimeter. (COM)
Red probe lead (Positive) goes in the Voltage port on the multimeter. (V)

If the multimeter just has symbols around the Function Knob, set it to the dotted line over a solid line, symbol.

The plug on the end of the AC adapter, that plugs into the laptop, has a center hole, and a cylindrical metal shield surrounding it.

The Center Hole of the plug is where the red Positive lead, of the multimeter goes.

The outside cylindrical metal shell is where the black Negative lead of the multimeter goes.

Hold the AC adapter plug in one hand, and at the same time hold the red Positive multimeter probe in the center hole.

With the other hand touch the black Negative lead of the multimeter, to the cylindrical metal shield on the outside of the plug.

You should read 19 Volts (DC), or VERY close to it,

http://www.cellularfactory.com/laptop/ACER/3/305268/

I believe the AC adapter is the problem. Post back in a Comment as to your findings.

Regards,
joecoolvette

Apr 29, 2012 | Acer Aspire 5738Z-423G32Mn Notebook

2 Answers

My HP dv7 laptop wont turn on I purchased a new battery and a new cord it worked for an hour then shut off again!!!!!!!!!!


Your DC connector is loose from the system board:


Problem symptoms:

  1. Laptop randomly shuts down without any warning.
  2. Power LED and battery charge LED start flickering when you wiggle the power cord or the AC adapter tip on the back or your laptop.
  3. The battery will not get charged.
  4. When you plug AC adapter, the laptop appears to be dead and there is no LED activity at all (DC-IN jack on the system board is broken).

If your laptop is out of warranty, then you can fix the problem by resoldering DC-IN jack on the system board. If it's still under warranty, it would be fixed at no charge to you.


http://www.insidemylaptop.com/disassemble-hp-pavilion-dv7-notebook/


Click on this link or copy and paste the complete link into your browser.

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it and give a testimonial for my response.

Thanks, Joe


Dec 01, 2010 | HP Pavilion dv6000z Notebook

1 Answer

I have an ASUS eee netbook. Recently the power cord hasn't been connecting well to the computer and now it doesn't even register. It's plugged in but isn't charging. Is it the cord or the laptop?



You have a bad DC connector, which came loose from the system board:


Problem symptoms:

  1. Laptop randomly shuts down without any warning.
  2. Power LED and battery charge LED start flickering when you wiggle the power cord or the AC adapter tip on the back or your laptop.
  3. The battery will not get charged.
  4. When you plug AC adapter, the laptop appears to be dead and there is no LED activity at all (DC-IN jack on the system board is broken).

Here is a tutorial on how to fix a DC connector problem. You may want to have a tech fix it.

http://www.laptoprepair101.com/laptop/2007/12/06/dc-power-jack-repair-guide/

Nov 30, 2010 | ASUS PC Laptops

1 Answer

My HP dv2000 shuts down and does not turn back on. The power cord is connected but the charging light is not on.


Your DC connector on the system board is loose:

Problem symptoms:

  1. Laptop randomly shuts down without any warning.
  2. Power LED and battery charge LED start flickering when you wiggle the power cord or the AC adapter tip on the back or your laptop.
  3. The battery will not get charged.
  4. When you plug AC adapter, the laptop appears to be dead and there is no LED activity at all (DC-IN jack on the system board is broken).

If it is under warranty, HP will repair it. If not , read this:

http://www.laptoprepair101.com/laptop/2007/12/06/dc-power-jack-repair-guide/


Click on this link or copy and paste the complete link into your browser.

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it and give a testimonial for my response.

Thanks, Joe

Nov 30, 2010 | HP Pavilion dv2000t Notebook

1 Answer

I have ac adapter plugged into the wall, and into the computer, the charge pack light is green, the battery is in the computer and the computer won't turn on at all


You probably have a bad or loose DC jack on the laptop:



Problem symptoms:

  1. Laptop randomly shuts down without any warning.
  2. Power LED and battery charge LED start flickering when you wiggle the power cord or the AC adapter tip on the back or your laptop.
  3. The battery will not get charged.
  4. When you plug AC adapter, the laptop appears to be dead and there is no LED activity at all (DC-IN jack on the system board is broken).


http://www.insidemylaptop.com/laptop-dc-power-jack-repair-techniques/

Nov 30, 2010 | Gateway SL1450-30145063 Notebook

1 Answer

My compaq Evo n610c my battery wont charge when on ac power.The light for when the battery wont go on.


sounds like your DC coonector came loose from the system board.it is a common problem with laptops,

Problem symptoms:

  1. Laptop randomly shuts down without any warning.
  2. Power LED and battery charge LED start flickering when you wiggle the power cord or the AC adapter tip on the back or your laptop.
  3. The battery will not get charged.
  4. When you plug AC adapter, the laptop appears to be dead and there is no LED activity at all (DC-IN jack on the system board is broken).
here is how to repair:

http://www.laptoprepair101.com/laptop/2007/12/06/dc-power-jack-repair-guide/

Nov 26, 2010 | HP Compaq Evo n610c Notebook

1 Answer

Laptop won't power on with ac adapter or battery


Could be a combination of things.

1) Battery is low. Not enough power to turn the laptop on.
Caused by;

2) AC adapter has a plug on the end of the cable. The plug plugs into a DC Power Jack on the laptop.

The DC Power Jack is bad.

2a) The DC Power Jack has a bad connection to the motherboard, (Cracked solder joints), and/or the jack itself is bad.

2b) Center Pin is loose in the jack's mount.
The back of the Center Pin where it mounts has become loose.

2c) The plastic body of the jack, which composes the jack's case, is cracked. This allows movement of the Center Pin.

2b, and 2c cause a bad connection with the AC adapter plug.

No charge to the Battery, no power to the laptop.

http://www.laptopjacks.com/view_part/For-Gateway-MX6920-DC-Power-Jack-GW51425.html

[ If this is the case the DC Power Jack needs to be resoldered to the motherboard. The cracked solder joints need to be re-melted, (Reflowed)
Entire laptop needs to be disassembled down to the bare motherboard in your hand.
(No Processor, Ram Memory, or any adapter cards mounted to the motherboard. Nada)

OR,
The DC Power jack needs to be replaced.
This entails disassembling the entire laptop, down to just the motherboard in your hand. (Same as above)

The old DC Power Jack is de-soldered, and a new one soldered in place.

Very FEW computer repair shops have the necessary skill level.
They just want to replace the entire motherboard.
IF one is available.
More Ka-Ching for them also. ]

3) The AC adapter is bad.
Not providing power to the laptop, to charge the Battery, nor give power to the laptop without the Battery.

AC adapter cord from adapter to plug, which plugs into the laptop, (DC Power Jack), may have a break in it.

May be an intermittent contact provided by wiggling the cord.
If this is the case the wires have stretched, and broken.
Wiggling causes the wires to briefly touch, and make contact.

Where this cord meets the plug itself. A lot of times there is a break in the wires in this area.

Solution is to replace the AC adapter. There are universal AC adapters you can buy, or perhaps Gateway still has some for sale.
(Ka-Ching)

Oct 21, 2010 | Gateway MX6920 Notebook

2 Answers

On AC Power


Your problem most likely lies wih the laptop power connector, the power cord connector is not making firm contact, that is why when you jiggle it connects. It might be the cord, you can check it by connecting it to another laptop exactly like yours and see if this plays up on that laptop, if it does then it is most likely the cord/power adapter. Don't connect it to a different brand name laptop, different brands use different voltages.

To replace the power connector on the laptop could be expensive unless you do it yourself, the laptop would need to be completely dismantled to get to the connector. Get a quote, they may charge for a quote, unless you accept the quote which may then be offset against the cost of the repair.

I recommend if the laptop is more than 3 to 4 years old, I would not repair it, put some blue tack around the connector to make the connection secure/firm, and put the repair costs towards a new laptop.

Dec 01, 2008 | Dell Latitude C400 Notebook

1 Answer

No power or lights on my inspiron 2650 laptop


First you need to test your adapter first not the power cord.Check that your adapter can give out according to the adapter spec..maybe 16-19ou V.If it does and still you laptop don't turn on then you have motherboard problem.
takecare.

May 05, 2008 | Dell Inspiron 2650 Notebook

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