Question about Gateway 400SD4 Notebook

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Power Jack I downloaded the manual for the 400SD4 and it does not show how to replace the DC power jack. Do you happen to know where I can find the info in this or do you know how? Thanks.

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  • Mandys97 May 03, 2008

    Hi Nacegirl, I have the same problem. When it first happened I sent it back to Gateway to fix. Then...a few months later (after my warranty had expired) it happened again. Did you have any success replacing the Power jack on your own?

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Most, if not all computer manufacturers do not include these instructions, & for good reason too. You should not attempt to replace a DC Jack if you are not very technologically savvy.

Repairing the actual DC Jack itself requires you to strip the notebook down to the motherboard. From that point you will need to de-solder the old DC jack (very carefully) and then solder a new DC jack to the motherboard. After those steps are complete, you need to test the power using a voltmeter. If the voltage matches up to that of the computers you can continue. After you have finished all of that the only thing left is to put the notebook back together.

More detailed instructions as well as photos can be found by doing a Google search. Try entering the make and model of your specific notebook.. Who knows, you may get lucky and find a link with how-to photos.

Posted on Apr 03, 2008

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Which ac do when a laptop compaq nc6400 is verr slow and doesnt charge the battery


What does the AC do? (Alternating Current)

Apparently not get rectified into DC electricity by the AC adapter, (Charger), or the rectified AC (Which is now DC), is not getting to the laptop.

Be sure the Battery is still good. They have a lifespan, and only last so long.

Verify, by performing a DC Voltage test with a multimeter, if the AC adapter is putting out the correct Voltage.

If it is an AC adapter for an HP Compaq NC6400 Notebook PC, the DC Voltage coming out of the AC adapter is supposed to be
18.5 Volts. (DC),

http://www.amazon.com/Notebook-Adapter-Presario-cq50-142us-cq50-110/dp/B001MQ4MNW

On the AC adapter plug going to the laptop, the center pin is the Positive connection.
The outer cylindrical metal shell is the Negative connection.

AC adapter puts out 18.5 Volts?
Have an assistant;

1) Gently wiggle the power cord coming TO the AC adapter.

2) Gently wiggle the cable coming FROM the AC adapter TO the laptop.

See if you get an intermittent reading on the multimeter. Indicates a broken wire.

[ An economical, but fine for this test, multimeter, can be purchased for as little as $8 to $12, here in the US.
Analog or digital is fine.
Available in a multitude of stores. An auto parts store is but one example ]

AC adapter checks out it's on to the DC Power Jack.
This jack is the round port on the laptop, that the plug from the AC adapter plugs into.

Battery removed use a wooden small object, and gently see if you can move the center pin around, for the DC Power Jack.

See if the rest of the DC Power Jack will move around.
ANY perceptible movement means a problem with the DC Power Jack.

The DC Power Jack looks like this not mounted to the motherboard,

http://www.batterystyle.com/compaq-nc6400-jack-p-436629.html

Click on the two views shown of the DC Power Jack.
The view on the left shows the jack from the back.
The view on the right shows the jack from the front. The view you see now.

Note that in both views the jack is shown upside down, in relation to how it actually sits on the motherboard.

The view on the left, (Back view), shows Prongs coming from the jack, that go down through the motherboard, and are then soldered.

The gold colored prong is the Positive prong. It goes to the Center Pin of the jack.
All of the silvery colored Prongs are for Ground, or Negative.

Where the Prongs are soldered to the motherboard, are called solder joints. Each prong has a solder joint.

It may just be that one, or more solder joints are cracked.
This would require disassembling the laptop down to the bare motherboard in your hand, then re -soldering any cracked solder joints.

[ Be SURE to use an ESD wrist strap, and have it's alligator clip connected to a good ground source, BEFORE working inside a laptop ]

It may be however that the DC Power Jack is damaged, and replacement is necessary.

HP Support > HP Compaq NC6400 Notebook PC > Manuals page,

http://h20000.www2.hp.com/bizsupport/TechSupport/DocumentIndex.jsp?contentType=SupportManual&lang=en&cc=us&docIndexId=64179&taskId=101&prodTypeId=321957&prodSeriesId=1847703

On this page click on - Service and maintenance information

(Under the - Quick jump to manuals by category - heading)

Under the bold - Service and maintenance information - heading, click on -
HP Compaq NC6400 Notebook PC Maintenance and Service Guide
(24 Apr 2007 / 4.61MB )

[ This is a PDF file. The computer you are using now has Adobe Reader on it, which uses PDF files.

After you click on the above file name, it may take up to 30 seconds, before the first page comes up ]

Need guidance in de-soldering, and removing the old DC Power Jack, and soldering in a new one?
Post in a Comment.

If the DC Power Jack checks out, you have a bad power correcting chipset. This is a type of Power MOSFET.
Motherboard replacement is the solution.

Regards,
joecoolvette

Apr 25, 2012 | HP Compaq nc6400 Notebook

4 Answers

Hello my laptop t41 power is not even flash but the adapter is working,am technician and i have troubleshoot allot.


I concur with what Diegotech stated.

To iterate further;

1) The DC Power Jack (DC IN), may have cracked solder joint/s on the motherboard connector, (Female), where the DC Power Jack plugs in.

Resolder

2) The DC Power Jack may be broken.
Center Pin mount, and/or body of DC Power Jack, and/or Outer Shell mount.

Replace DC Power Jack.

3) Wires from the DC Power jack plug to the female connector on the motherboard, may be bad.

Replace DC Power Jack.

Two examples, of a place to buy an IBM ThinkPad T41 DC Power Jack,

1) http://www.buy.com/prod/dc-power-jack-connector-socket-for-ibm-thinkpad-t40-t41-t42-r50-r51-r52/q/sellerid/23962916/loc/101/215782035.html

2) http://www.machinaelectronics.com/store/buypart/IBM_Thinkpad_T41/DC-P001

Past this point it's a bad DC sensor on the motherboard.

Replace motherboard.

IBM ThinkPad T41 Service Manual, (Free),

http://www.tim.id.au/blog/tims-laptop-service-manuals/#toc-ibmlenovo

On this page go down to the 8th line.
The one that starts with > ThinkPad T20.

Go across, and click on > T41

Takes approximately 2 seconds to see the first page, and additional time to fully download.

Page 142 for 14.1 inch LCD screen
Page 151 for 15 inch LCD screen

(PDF file page number box at top)

Dec 01, 2010 | IBM ThinkPad T41 Notebook

1 Answer

There is a bad connection between the power cord and the port into which it fits. this bad connect has lasted for weeks. i've been able to jiggle the cord and situate it so their is a connection. but, now...


The port on the laptop where the AC adapter, (Charger to some), plugs into is the DC Power Jack.
(Or DC-in )

This is an example of an aftermarket manufacturers offering for a DC Power jack, that fits an Acer Aspire 4520 Series Notebook, (Laptop),

http://www.laptopjacks.com/view_part/Acer-Laptop-DC-Power-Jack-AC91316.html

Click on the photo of the jack, showing three views of it. This will enlarge for better detail.

As you probably know computers use DC voltage.
Your laptop battery, and a flashlight battery are examples of stored DC electricity.

Looking at all three views, the middle pin of the jack is for the Positive connection. Down inside the round opening on the side, is a strip of metal. One on each side. These are for the Negative connection.

Looking at the jack in all three views, you will note a flat pin, or Prong, that comes up in the middle, and at the back of the jack.
You will note that it is riveted to the center pin, or Positive connection.

The two flat pins, (Or Prongs), immediately on either side of the middle flat pin, are for the Negative connection. They connect to the strips of metal inside the round jack opening.

In relation to how the jack sits inside the laptop, the jack is upside down. The flat pins go down through the motherboard, and are soldered to the motherboard on the other side.

1.The body of the DC Power Jack is made of a type of Phenolic plastic. Hard, and has great insulating qualities.

It is also easily broken.
If you can move the center pin around, this is what has happened. (Battery REMOVED!)

Solution is to replace the DC Power Jack.

2.Where the flat pins go through the motherboard, and are soldered, is called a Solder Joint. The area where the flat pin meets the motherboard, and solder is applied.

One, or more solder joints can crack.
This gives you an intermittent connection, such as you have described.

Solution is to re-solder the solder joint/s.

3.There are also laptops that have a bad motherboard design.
The DC Power Jack is placed on an area of the motherboard, that is weak.

If you think of a 1 foot square sheet of plastic, as being the main body of the motherboard, and attach a 2 inch strip to the main body, this is the area shape that I'm referring to.

The 2 inch strip can crack, where it meets the main body.
Motherboards have Circuit Traces. Think of them as Very, Flat, Thin, copper wires.
Circuit traces go across the main body of the motherboard, and lead to the 2 inch strip. If this 2 inch strip cracks away from the main body of the motherboard, the circuit traces break.

If you move the AC adapter plug while in the DC Power Jack, you may be able to make the broken circuit traces touch each other, making a connection.
Eventually this fails to work.

Solution is to replace the motherboard. With this type of bad design the problem will reoccur.

This link is for the Acer Aspire 4520 Service Manual.
It is free.

http://www.tim.id.au/blog/tims-laptop-service-manuals/#toc-acer

As you can see there are many service manuals listed for Acers.
Scroll down with your eyes to the second Aspire listing. (Starts with 1200, 1300, 1310, 1350, and so on)
Scroll across the third line down, until you come to - 4520
Click right on 4520

This is a PDF file download. After you click on 4520, you may not see anything happening for a few seconds. The file is downloading in the background.

Advise letting the file download all the way, before looking through it. You might break the download connection.

If you wish to save a copy to your computer, go up to the top header, and click on the Floppy Disk icon.
This is the second icon from the left.

If you hover your mouse cursor over the icon, it will briefly reveal, 'Click to save this to your computer or another location'

After you click on the icon a small window comes up.
Save a copy...
Down in the Save a copy box you will see -
File name:

In the box to the right of File name, you will see -
aspire 4520 1220 4520g 4220g

Advise put your mouse cursor right after the g in 4220g, Left-click Twice, then make one space with your space bar.
Now type - Service Manual

Makes it much easier to find.
If you save it to your computer, you won't have to download it again. You can also burn it off to CD disk, and free up space on your harddrive.

I haven't worked on the Acer Aspire 4520 series yet.
The DC-in jack, (DC Power Jack) is on the Right side at the rear. (Page 17)

Looking at the Board Layout, Top View, on Page 12, you can see the DC Power Jack.

Come down below the 1 with the red small rectangle. Look straight to the left of the Half Moon hole, with the two top corners cut off. The DC Power Jackis on near the edge of the motherboard. (Board)

(You can click on the + sign in the top header, to zoom in)

On Page 13 you're looking at the Bottom view of the motherboard. (Board)
The little silvery dots are solder joints.

Your motherboard design does not follow Item 3,
I listed above.
You have a broken DC Power Jack, or cracked solder joints.


Dec 08, 2009 | Acer Aspire 4520-5582 Notebook

5 Answers

MY GATEWAY LAPTOP NO LONGER RECEIVES POWER.


Motherboard or harddrive? I'm betting it's more towards the motherboard. The DC Power Jack to be more specific. This is the port where the AC adapter, (Charger), plug is plugged into.

The DC Power Jack is not much bigger, than the plug for the AC adapter that plugs into it. There are small pin leads that are on the bottom of this jack, and they go through the motherboard, and are soldered to the motherboard.

Accidental bumping of the AC adapter plug, while plugged into the DC Power Jack, can damage the jack. It can break the connections for the adapter plug, and/or can crack the solder joints for those small pin leads.

[Laptops use DC electricity. A flashlight battery, and a laptop battery, are examples of stored DC electricity. DC electricity has two poles. Positive and Negative. The DC Power Jack has two connections. Positive and Negative. {Even if the DC Power Jack has multiple holes in it]

There is also another known problem associated with DC Power Jacks. It may stem from a bad motherboard design.

More to the point, the area where the DC Power Jack mounts on the motherboard. In this design, the DC Power Jack motherboard area, is almost a separate part of the motherboard. It's shaped like a Peninsula. (Think of an island, with one side connected to the mainland)

This peninsula shape, has the tendency to crack away from the main body of the motherboard. Circuit traces are broken.

When the AC adapter plug is setting in a certain position, it presses the two broken halves of the circuit traces together, for a momentary contact. As the AC adapter plug is moved from this position, the circuit trace halves are moved apart, and there is no contact.

(No distribution of electricity from one circuit trace half, to the other circuit trace half. Think of a circuit trace as a very, thin, flat copper wire. When a circuit trace is broken, there is essentially a wire that is broken into two parts)

Solution?
See if the DC Power Jack can be repaired, (Solder joint connections re-soldered), or replaced.
If the DC Power Jack motherboard area is the aforementioned peninsula shape, it may require replacement of the motherboard.

There are very FEW, computer repair shops that have the technical expertise to replace a DC Power Jack. Easy fix is to simply replace the motherboard. (More $$$$$ too)

However, some laptops DO require replacement of the motherboard for this repair.
Bad motherboard design, for the DC Power Jack area on the motherboard.

Re-solder DC Power Jack solder joints? (IF, this is the problem) Average is $50 to $75 (US)
Replace DC Power Jack? Average is $125 to $150. (US)
Replace motherboard? Depends on the Gateway model. Could be $225 to $400 (US)

[Yes, most of the time the cost warrants just replacing the laptop itself, as the cost of replacing, is close to the repair cost)

Just to SHOW you ab average DC Power Jack, and the repair involved of replacing. (Doesn't show you, that the entire laptop needs to be disassembled, down to the bare motherboard in hand)

This is NOT a recommendation to replace the DC Power Jack yourself! It is just for knowledge of what is partially involved. (You can accidentally burn the motherboard when desoldering, or soldering, rendering the motherboard useless)

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

Sep 09, 2009 | Computers & Internet

3 Answers

Intermittent dc jack connection for Gateway mx3215


Here is how to disassemble Gateway laptop,

Here is replacement DC socket (needs soldering),

Here is DC board (no need soldering, but expensive).

Hope this helps.

Mar 17, 2009 | Gateway MX3215 Notebook

1 Answer

How can i open up my Gateway 7322GZ to replace DC power jack?


Here is the direct link for downloading the manual that will walk you through the procedure you wanna pursue.. It's gateway's original manual n hope you get some idea about how to open up ur laptop

http://www.adrive.com/home/downloadfile/136709577

Feb 13, 2009 | Gateway 7322GZ Notebook

2 Answers

Hp zd8000 power jack replacement


link
for purchase of power jack
will try to get more info on procedure

Aug 19, 2008 | HP Pavilion zd8000 Notebook

2 Answers

Dc jack removel


I believe the DC jack is soldered to the board on that model. It must be unsoldered to remove (from the bottom of the board) and the new one soldered on. A soldering iron and a solder sucker (to cleanly remove hot solder) can be bought at Radio Shack, HOWEVER if you've never soldered before I would NOT ATTEMPT TO DO THIS REPAIR MYSELF! It's very easy to toast the motherboard if you don't know what you're doing. I would suggest finding a local electronics/computer repair shop that knows how to work with SMT components. Ask them for an anti-static bag for the motherboard and just bring the motherboard and new jack down to them to have the new one installed. It shouldn't cost more than $40 to replace that way and more like $20-30. Good Luck, El Duderino

Oct 20, 2006 | Gateway 400SD4 Notebook

3 Answers

Broken dc jack on gateway 400sd4, need to disassemble


You can download a .pdf service manual from here: http://www.eserviceinfo.com/fulltext.php?search_ft=400sd4 It is a multi-part download so make sure you get all four parts to the manual before you try to open it. (if you need WinRAR to unzip the files you can get a demo at download.com) The service manual has instructions and photos on how to disassemble your laptop. Good Luck, El Duderino

Jun 29, 2006 | Gateway 400SD4 Notebook

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