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Connection on back of laptop for power broken

Hi there , i have a major problem with the power connection for the mains adapter on the back of my samsung v25 laptop,i have taken it apart and it is broken ,i have no idea were to get 1 from and a part number for this item, can u tell me were i can get a drawing from so i can identify it on the drawing , please can u help me as samsung can not help me at the moment

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  • ashiq_s Feb 28, 2009

    the power connector on the motherboard has broken and having trouble finding spare part . the power adapter is fine ..... batterys flat now ay using system again till i get a solution. seen one of the tips . how would i know the polarity of adapter ?

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Hi, Simply can't get these things..
go to jaycar or any electronics bit retailer and get a female plug suitable for your AC adapter and attach/solder it to the mainboard with a 2 - 3 inch long cable or longer (2 wires). polarity is very important - can't afford to make a mistake.
Leave that female adapter loose & flexible at the back of your notebook, that way you won't break it again.
You are not he only one, Stats = 20% of notebooks die this way.
I am a techy and I see then every day..
I have done many of them, this way..
Hope you can do it too.

Posted on Jul 08, 2008

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Laptop will only charge when sidewards pressuse is put on connection at back of laptop


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.

Jan 20, 2013 | Toshiba (K000006610) for Satellite P25...

1 Answer

Screen doesn't come on power indicator light on when plugged in, any suggestions?


1) Unplug AC adapter (Charger) from surge protector strip. Unplug AC adapter from laptop. Plug AC adapter back into power, then plug back into laptop.

No?

Then the AC adapter needs to be checked.

http://www.ebay.com/itm/AC-ADAPTER-CHARGER-Everex-Stepnote-NM3500W-NM3900W-bfj-/390447149498?pt=Laptop_Adapters_Chargers&hash=item5ae876b1ba

The AC adapter converts high 100 to 240 Volts AC, from your home or business; into 19 Volts DC. (19VDC)

Looking at the AC adapter example above, the plug end that plugs into the laptop; has two connections;

1) The Center Hole is the Positive connection.
2) The outside cylindrical metal shell is the Negative connection.

Using a multimeter to check;
Set the Function knob to DC Voltage. If just a symbol, the symbol is a dotted line over a solid line.
If there is more than one DC Voltage scale, set the Function knob to the 0-50 Volt DC scale. (0 to 50 Volt)

The Positive (Red) probe lead goes to the Center Hole.
The Negative (Black) probe lead goes to the cylindrical metal shell.
You should be reading 19 Volts (DC)

Have an assistant gently wiggle the cable FROM AC adapter TO laptop.
Also have the assistant gently wiggle the power cable FROM surge protector TO AC adapter.
Fluctuation in reading on multimeter; indicates a broken wire, in one of those cables.

Replace AC adapter if so.
Not 19 Volt reading? Replace AC adapter.

[An economical multimeter can be purchased, for as little as $5 to $12. An auto parts store is but one place to puchase one. I have seen them on checkout aisle racks, in major discount stores.

I can guide you step by step with it, if you post the manufacturer name, and model number of the multimeter.
Skittish about measuring the voltage? Worried about shock?
I understand. However, I wish you to know that two D cell flashlight batteries, store 3 Volts DC. You will be measuring for 19 Volts DC.

Or take the AC adapter to the nearest small computer shop. The resident tech should only charge a couple of bucks, to test it for you]

AC adapter checks out?
Then the diagnosis goes on.
(Or you may wish to skip to the next step, and perform it first)

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

http://www.ebay.com/itm/Everex-StepNote-NM3500W-Motherboard-WORKING-/230663580965?pt=LH_DefaultDomain_0&hash=item35b49eed25

Looking at the photo of the motherboard, you are looking at a Bottom view. The Processor, and Ram Memory are on the Bottom of the motherboard.

There are two silvery looking ports, on the BOTTOM/Left corner.
The one all the way to the Left, is the Ethernet port.
Next to it on the right; is the DC Power Jack.

Another look at the jack not installed;

http://powerjack.us/index.php?main_page=product_info&cPath=105&products_id=13456

Great! Can't find an exact listing for an Everex NM3500w DC Power Jack.
However the above example mounts the same. The connecting prongs (pins) on bottom, may be in a different pattern, though.

Click on the photo to enlarge.
This shows a bottom view of the jack. The rounded tipped prongs go through holes in the motherboard, and are soldered on the opposite side.

The prong all the way in the back of the jack, left side; goes to the Center Pin. The Center Pin is the Positive connection.
The prong coming up from it in the middle, is for the Negative connection. It goes to the contact/s surrounding the inner hole, in the jack. (Inner hole around the Center Pin)

Battery removed, AC adapter removed; see if you can gently move the Center Pin, using an eraser on the end of a No.2 pencil.

ANY perceptible movement means the DC Power Jack needs to be replaced.
If it seems the entire jack itself moves, problem may just be a cracked solder joint, or joints. Or may be a bad power jack.

A cracked solder joint will make an intermittent contact, or No contact at all; of DC Power Jack TO motherboard.
Battery will not receive power, laptop will not turn on.

Power On LED indicator is on? Means nothing really. Uses way less than 1 Watt of power to light that LED. (Light Emitting Diode)
A cracked solder joint could allow that much power, but not enough to turn the Processor on.

DC Power Jack seems fine, from this simple cursory test?
You really have to disassemble the laptop, remove the motherboard, and check; to be sure.

See if by gently wiggling the Body of the DC Power Jack, if there is any perceptible movement.
Use a bright light, and magnifying glass; to carefully scrutinize for a cracked solder joint.

AC adapter checks out? DC Power Jack checks out? Next in line are the Power MOSFET's.
Now we are talking board level component replacement; (SMD's), Or motherboard replacement.

!O_O!
Using the HP Pavilion dv6000 series, and Pavilion dv9000 series of Notebook PC's; for info about Power MOSFET's in the charging/power section, of the laptop's motherboard. (DC to DC Circuit),

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

Cost exceeds repairing laptop feasibly, and you need to retain the information on the Harddrive?
Suggest removing harddrive, and installing in an economical external enclosure.

The harddrive resides in a Harddrive Caddy. A sheet metal enclosure. Then both are installed in the laptop. The sheet metal Harddrive Caddy is removed, so the Harddrive can be installed in the external enclosure.

Don't know what technology the Harddrive uses.
Do not know if it is an IDE (PATA) unit, or a SATA unit.
DO KNOW that it is a laptop harddrive, and will be 2.5 inches across in Width.

(2 and 1/2 Inches)

Once the Harddrive is removed, you can look the model number up on the internet, and see if it is an IDE, or SATA unit.

[IDE is referred to as PATA also. Parallel ATA.
SATA is Serial ATA,

http://en.wikipedia.org/wiki/Parallel_ATA

http://en.wikipedia.org/wiki/Serial_ATA ]

You can also post back here with the Harddrive's model number, and I can find the information out for you.

IDE (PATA) example;

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=1086960&CatId=2782

(Scroll down)

SATA example,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=5601768&CatId=2783

Scroll down)

Reviews I found on the 'net were few, and lacking. One's for sale on places like Ebay, give sketchy information on what the laptop even looks like.
However I believe I can guide in disassembling, if you wish.

For additional questions please post in a Comment.
Regards,
joecoolvette

Jan 06, 2013 | Everex Stepnote Nm3500w 15.4" Laptop Intel...

1 Answer

My sony vaio charger does not work


Hi

You do not say if this is a Sony Vaio Laptop or All-in-One desktop, both of which use AC/DC Adapters (chargers).

I will assume it's a laptop

Try to isolate the fault.

Remove the battery from your sony vaio laptop.

Power the laptop on with just the direct mains power. If it works, then the fault may be with your battery.

If the power cable takes a fuse, check the fuse.

If the power cable and battery are okay, then the adapter may be faulty and cannot be safely repaired. So you must replace it.

You can buy compatible (cheaper) or original adapters from reliable suppliers at Amazon Market Place (www.amazon.com), where reputable traders supply warrantied goods onder Amazon's oversight. For additional protection, pay with a major credit card and benefit from your card issuer's protection scheme.

I hope this helps.

Aug 27, 2011 | Motherboards

1 Answer

My toshiba satellite l35 wont turn on,,,the light blinks then shuts off ,,,thats all it does


You may have a DC connector problem:

Symptoms of a broken power jack
1. If you wiggle the power cord or the AC Adapter connector on the back of the laptop, the power LED and battery charge LED start to flicker.
2. Battery will not charge in the laptop.
3. Laptop runs fine off a charged battery.
4. With the AC Adapter connected the laptop appears to be dead.
No power LED or battery charge LED activity.
5. Laptop randomly powers off without any warning.

If your laptop is out of warranty, then you can fix the problem by re-soldering DC-IN jack on the system board. If it

May 17, 2011 | Motherboards

1 Answer

I bought new universal adapter for asus laptop and it charges batery just when laptop is turned off


Problem description: The battery charges only when the laptop turned off. The battery charge LED lights up as normal and the battery gets charged to 100% while the laptop is off.
When the laptop is turned on, the battery charge LED goes off even if the adapter is still plugged in.
Possible cause: 1. AC power adapter failure.
2. Battery failure.
3. Broken/loose power jack.
4. Motherboard failure.
Possible troubleshooting steps and repair solution: 1. This problem could be related to a faulty AC power adapter. It's possible that the AC adapter doesn't provide enough power when plugged into the laptop. To find out if this is your problem, you'll have to test the laptop with another working adapter.Replace the adapter if needed.
2. There is a slight chance that you have bad battery. Test the laptop with a know good battery and replace the faulty one if needed.
3. The battery charge problem could be related to the power jack. Maybe the jack is broken or not making good contact with the motherboard. It is necessary to remove the motherboard and take a closer look at the power jack. Resolder or replace the jack if needed.
4. If the power jack is in a good working shape and new power adapter with battery do not fix the problem, most likely you have a faulty motherboard. Replace the motherboard if needed.

Reference: http://www.chargerbuy.com/blog/battery-charges-only-when-laptop-turned-off/


ASUS laptop AC Adapter

Jan 25, 2011 | Motherboards

1 Answer

HP Compaq laptop won't charge/power from AC due to blown fuse


Hi there,

There's plenty of causes why your laptop would not power up from the AC adapter and won't charge the battery. Here are some possible causes and solutions to this problem:

Number one, if it's on battery power, the battery is dead or the battery is bad and number two the AC adapter could be bad. Let's roll out number one.

1. Take out the battery, remove main supply, hold power button down for 30 seconds. This will drain the charges in your

battery. Put only power supply in, do not put battery in, turn laptop on, put the battery in.

2. If the solution in no.1 doesn't solve the problem, pull the battery out, keep the battery out of the laptop for this test.

Take your AC adapter and check the voltage with a voltmeter. What you want to test for is voltage. Put the meter at 20

volts DC and take the tip, the power jack tip of your AC power adapter. You hold the black, (the negative part) of your

voltmeter on the outside of the power jack tip of your AC adapter and you put the red (the positive part) of your voltmeter

in the hole in the inside of the power jack tip of your AC adapter. Be very careful not to touch the red and the black part of

your multimeter and the power jack tips of your AC adapter together, otherwise it will create a short circuit.

After doing these procedures, if your AC adapter is good it will output a voltage which ranges from 18 to 19V DC on your

voltmeter, depending on the voltage that puts out on your AC power adapter. If your voltmeter doesn't show any voltage,

probably your AC power adapter is bad or damaged. But if your voltmeter shows up voltage, then we have to go to the

next possible cause why your laptop won't power on.

3. The dc jack on your laptop might be bad, if the dc jack on your laptop is bad or not making a connection to the

motherboard then it look the battery is bad as well, because the battery is now not holding a charge or even taking a

charge. Also, even if your AC power adapter is good and when you insert it to the dc jack in your laptop it could not power

up the laptop because the dc jack is not making a connection to your laptop motherboard in other words the dc jack might

got loose, that's why it's not making any connection to the motherboard. The only way to solve this is that you have to

disassemble your laptop, and take the laptop motherboard out and look where the dc jack is connected. After you found it,
take a file tool and file off a spot on the motherboard where you can reattach the power jack and use a wire to reattach

the power jack to the motherboard.

Hope you find this answer helpful. God bless.

http://compunics.blogspot.com/2010/06/podnutz-high-definition-laptop-repair.html





Jun 03, 2010 | HP Compaq Motherboard

1 Answer

Ibm thinkpad R52 laptop no powering on, adapter is ok.


There could be a problem with the battery. A fast check to determine whether you have a problem with the power adapter, power cord or the laptop's battery is to turn off the laptop, remove the battery, connect the power adapter, turn on the laptop & see if it works.
If the laptop works directly from the power adapter with the battery removed, then the power adapter is good. In this case we can suspect that the battery is defective & needs to be replaced.

If this did not work, try also disassembling the laptop & make sure that all main components are seated properly. Also make sure that all ribbon cables interconnecting the various components of the laptop are tightly connected.

Dec 26, 2009 | IBM Lenovo ThinkPad R52 Motherboard -...

1 Answer

Toshiba plug-in ac adapter LCDlight flashing and wont boot up


It may be that you need a new, (Or good condition used), motherboard. You may not.

The problem could be the DC Power Jack. The DC Power Jack is small, and the body is made of plastic. Sometimes there is a metal shell around the plastic body. (The jack is a rectangular shape, and is just a little larger, than the outside portion of that AC adapter plug!)

This is an example of a DC Power jack for a Toshiba Satellite a215-s5807,
http://www.notebookworks.net/ProductDetails.asp?ProductCode=NBW52-0133

As you know there is a metal pin in the center, and at the back of the round hole, there are flat metal contacts.

Let me explain the construction of a DC Power Jack, and how it's mounted to a motherboard. This all has relevance to the solution.

Your laptop uses DC electricity. (The AC adapter converts AC to DC. Your laptop battery, and a flashlight battery, are examples of stored DC electricity)

DC uses a Positive connection, and a Negative connection. The metal pin in the center is Positive. The flat metal strips at the back are Negative.

That laptop DC Power Jack has metal prongs, that come out of the plastic body. One prong, (Or pin), connects to the Positive metal round pin, in the center of the jack.
There may be one, or two prongs, (Or pins), that come out of the plastic body, and connect to the Negative side of the jack. (Flat metal strips)
These prongs go down through holes in the motherboard, and are soldered on.

With the AC adapter plugged in, an accidental bump on the plug itself, could break the body of the jack, or break solder joints that hold the jack to the motherboard.

AC adapter removed, and battery removed. Use a NON-metallic object, and see if you can make the center pin of the jack move. See if the entire jack itself seems to move.
A.If the center pin moves, you have a broken DC Power Jack.
B.If the entire jack moves, you have cracked solder joints. (Broken)

Replacement of the DC Power Jack for A.
Re-solder the solder joint/s for B.

Cost of replacing a jack at a reputable computer repair shop? $90 to $150
Cost of re-soldering solder joints? $50 to $90
Cost of replacing the motherboard?
$250 on up.

If you are a skilled person with the correct tools, it is feasible for you to replace the jack, or re-solder the solder joints.
It is also feasible that you yourself, could replace the motherboard.

Some laptops have a poor motherboard design, for where the DC Power Jack is mounted to the motherboard.

Crude explanation would be, that the main body of the motherboard is a 1 foot square. Then a 2 inch square comes out of the side of the main body.
The DC Power Jack is mounted to that 2 inch square. From accidental bumping, OR just normal usage of inserting, and removing the AC adapter plug, this 2 inch square can crack away from the main body.
This, of course would require a motherboard replacement.

Disassembly instructions for a Satellite A200 and A205 Series laptops. Very close to the A215 Series,
http://www.irisvista.com/tech/laptops/toshiba-satellite-a205/laptop-disassembly-1.htm

(Don't forget to buy, and use a cheap ESD wrist strap, to prevent static shock to the delicate hardware components, inside your laptop. Average cost is $7)

Aug 04, 2009 | Motherboards

1 Answer

Acer laptop Aspire 7000 does not power on


If the laptop does not power up (not a slight sign of power flowing through it) even if the AC adapter is plugged into it, here are the possibilities:

1. You AC adapter might be broken and need to be replaced. Some AC adapters have a light on it to signify that there's power flowing from the power outlet to the power cable.

2. If your AC adapter is working fine, maybe your power supply is broken. If your laptop is with in warranty, have Acer replace it. If not, find a repair center who does.

Apr 10, 2009 | Acer Motherboards

1 Answer

Easynote r1935


Chances are the notebooks adapter is broken. Take a look at this link & it will show & explain how to repair the jack.
http://www.laptoprepair101.com/laptop/2007/12/06/dc-power-jack-repair-guide/

Please read everything on the link.
If this is too tough to fix you're self. I suggest you take it to a pro. At least you'll all ready know what needs fixed.

Good Luck!

Mike

Jul 11, 2008 | Packard Bell (181379) Motherboard

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