Question about Gateway M350 Notebook

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Can I swap a 4pin dc jack for a center barrel jack?

Or aren't the 2 parts interchangeable inside the pc?
thanks!

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  • maknic Aug 25, 2008

    Thanks for replying. I wasn't sure if the jacks might have a standard tab placement or not.

  • maknic Aug 25, 2008

    That listing is what led me here. :-) Been trying to decide whether or not to bid on the old m350 up for auction - not sure which type of adapter it has. Wish me luck, and thanks again for your help. Once I open up the thing, I may be back!

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You can as long as the tabs on the jack that soldier onto the motherboard line up, and you have a power supply that meets the input ratings of the machine.

Posted on Aug 25, 2008

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Problem with HP 8510q laptop charging. Charging not working. Laptop working only that time when i have power in battery. Charging light not show. I try other charger but same problem. Is it inside some...


Inside? Yes. (If 'charger' is good)
Fuse?
No

Diagnostic flowchart:

A) AC adapter (Charger), has to be KNOWN to be good, before going on.
Used on a working laptop to see, or multimeter is used to check Voltage (DC)

The plug end that goes to the laptop, from the AC adapter, has a Center Hole, and a cylindrical outside metal shell.

The Function knob is set to DC Voltage. If just a symbol, the symbol is a dotted line over a solid line.
If more than one DC Voltage scale, the Function knob is set to the 0-50 Volt DC scale.

The Positive (Red) probe lead of the multimeter goes to the Center Hole, and the Negative (Black) probe lead of the multimeter, goes to the cylindrical outside metal shell.

You should be reading 19 Volts DC.

Also have an assistant gently wiggle the cable FROM AC adapter TO laptop, and the power cable TO AC adapter.
If there is a fluctuation on the reading, there is a broken wire, or wires, in one of those cables.

B) Check the DC Power Jack.
This is the jack on the laptop (DC_IN) that the AC adapter plugs into.

Has a Center Pin, and an inner cylindrical metal shell.
Battery removed, use an eraser on the end of a No.2 pencil, and see if you can GENTLY wiggle the Center Pin around.

ANY perceptible movement of the CENTER PIN, means replacing the DC Power Jack,
(By the way, is it an 8510p, or 8510w?)

http://www.alldcjacks.com/en/ppj052-laptop-dc-power-jack.html

Any movement of the rest of the DC Power Jack (Body), means replacing it; or may just mean the solder joints are cracked, and can be re-soldered.

C) AC adapter and DC Power Jack checks out?
Problem may be with Power MOSFET's on the motherboard, and associated MLCC's.

(Multi-Layer Ceramic Capacitor, and they are SMD/SMT just like the Power MOSFET's.
Surface Mount Device/ Surface Mount Technology)

Using HP pavilion dv6000 series, and Pavilion dv9000 series Notebook PC's, for an example,

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

Or, it could be worse,

http://koti.kapsi.fi/jpa/stuff/pix/travelmate_6292/

Regards,
joecoolvette

Dec 23, 2012 | HP Compaq 8510p Notebook

1 Answer

No power on my samsung rv510


Zinzee, check the AC adapter first. (Charger)
Wiggle the power cord from AC adapter to surge protector.
See if the AC adapter LED power on light, blinks.
Yes? Bad power cord.

No change?
Go on.

The port on your laptop that the AC adapter plugs into, is the DC Power Jack.
Wiggle the cable from DC Power Jack to AC adapter.
Power On LED light up, or blink?

Change? New AC adapter. (Also need to check DC Power Jack center pin, to ensure problem is cable, not DC Power jack)
No Change?
Go on.

Unplug the AC adapter from the surge protector. You will need a multimeter now.
An economical multimeter can be purchased for as little as $5 to $12. Available at a multitude of stores. An auto parts store is but one example. (Not for $5 probably )

The Function Knob is set to DC Voltage. (DCV)
If just a symbol it is a dotted line over a solid line.

The center hole in the plug of the cable that goes to the DC Power Jack, is the Positive connection. This is where the RED probe lead (Positive), of the multimeter goes to.

The outside cylindrical metal shell of the plug is the Negative connection. This is what the BLACK probe lead (Negative), touches against.

You should read very close to 19 Volts (DC)

Have an assistant wiggle the AC adapter cable to DC Power Jack.
AC adapter is good? No intermittent reading on multimeter?
Go on.

Remove the Battery. Take a No.2 pencil, and use the eraser to GENTLY, see if you can wiggle the center pin around, of the DC Power Jack in the laptop. (DC_IN)

ANY perceptible movement means a problem with the DC Power Jack.

http://www.amazon.com/POWER-SOCKET-CONNECTOR-SAMSUNG-SERIES/dp/B008AGK43O

Chose link for the 4 views of the DC Power Jack.
Underneath the large Main view, there are 4 smaller views. Click on the one all the way to the right.
This is a view of the Back of the DC Power Jack, and the side that faces in on the laptop.

Note the L-shaped prongs on each side of the jack. These go down into the motherboard, and are soldered to the motherboard.
The 3 vertical lugs you see on the back, are the power, and Ground connections for the jack, and are also connected to the motherboard.

1) The center pin of the jack mounts to the jack's body, like a rivet. It is squished on the back, and this holds it in place.
Very easy to break that mount, and loosen the center pin.

2) The connections on the back are soldered, as previously stated, as are the 'L prongs' on the sides. Solder connections are also known as Solder Joints. If the jack moves with the pencil, and it seems to not just be the center pin, one or more of these solder joints could be cracked. (Broken)

Number 1 above means P-r-o-p-e-r-ly removing the DC Power Jack, and properly soldering a new one in.

Number 2 above just means re-soldering cracked solder joints.

DC Power Jack proves to be good?
Go on.

At this point those who use the moniker 'Technician', but in reality aren't a tech, will want to replace the motherboard.
In reality the Power MOSFET's should be checked, to see if they are good.

IMHO a $4 to $5 P.MOSFET (Or two of them), is much cheaper than a $200 motherboard.
Of course if there is $125 to $150 in labor, the savings isn't that great.

Buy an ESD wrist strap, connect it's alligator clip to a good ground source, remove the motherboard, buy the DC Power Jack, and take both to the tech. Should be about $50 labor, or less to replace the Power MOSFET/s. (May not be both of them, just one)

http://www.radioshack.com/product/index.jsp?productId=2103245

[ I connect to an unpainted surface, of the metal frame of an open, empty desktop computer case.
You can also set a large metal serving tray (Unpainted), on the table you are working on, or a large metal knickknack (Unpainted), and connect to it ]

No Zinzee I do not know what manufacturer, and manufacturer number, of P.MOSFET's are used on your Samsung.
I DO KNOW;

1) They us J-leads on the bottom.
Examples,

https://docs.google.com/viewer?a=v&q=cache:oER5NNz8cwcJ:www.fairchildsemi.com/ds/FD/FDS6675BZ.pdf+Fairchild+FDS6675BZ&hl=en&pid=bl&srcid=ADGEEShOhWPjm_M-ROHme4iEMrztCTOd-28jNiy1hVLQQh_VOyv8zcXEVDB_iTQA6MuZO88UmRkDgjyW9j4CP2aIJ-4DS-h6JNM3lvxldeApQeecmz_DADCw1s7tmNLxfPknqX14SZP6&sig=AHIEtbS_rYUAeo_8rB9YHkW05ZjLqeH4Jg

http://www.siliconfareast.com/soic.htm

They are located near the DC Power Jack on the motherboard, usually. Example using HP dv6000 and dv9000 series laptops,

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

Using Fairchild FDS6679 Power MOSFET as an example,

http://www.ic2ic.com/search.jsp?sSearchWord=FDS6679

$2.74 US

For additional questions please post in a Comment.

Regards,
joecoolvette

Sep 07, 2012 | Samsung Computers & Internet

2 Answers

My acer aspire 7720G shut down random


Wait a minute. What?

From what I read;
1) One wire of the AC adapter (Charger) is hot to the touch.
'.....when I touch the charge one part of the wire is very hot."

2) AC adapter checks out as far as voltage is concerned.
"I tested the charger voltage and everything is ok."

3) "Sometimes when I touch the charge appear the icon...Could it be the charger broken wire?"

Does this mean, "Sometimes when I touch the AC adapter (Charger), the battery icon appears."?

Battery is CHARGING icon?

Could it be a broken wire in the power cable TO charger?

Uh, yeah.

1) AC adapter NOT plugged into the DC Power Jack, plug the power cable of the AC adapter into power.

Multimeter set to DC Voltage, and proper scale, red Positive lead to harness wire that goes to DC Power Jack's center pin;

,black Negative lead of multimeter, to wire that goes to DC Power jack's inside cylindrical metal shell;

Now gently wiggle the cable from the AC adapter, TO the DC Power Jack of the laptop.

Do you get an intermittent reading?

2) Also, how did you replace the DC Power Jack? What steps did you take?

http://www.dcpowerjacks.net/catalog/index.php?main_page=product_info&products_id=1291

Did you reuse the wire harness, and solder it to the DC Power Jack?
Have a lot of experience in desoldering/soldering?
What tools did you use?

25 Watt soldering iron?
.025 or .030 rosin core solder?

Desoldering Tool, or Desoldering Braid? (Solder Wick)
Side Cutters instead, and slightly shortened the wires of the DC Power Jack's harness?
(Then tinned the wires, and soldered the wires of the DC Power Jack harness, to DC Power Jack?)

Damp sponge, and cleaned the well tinned No.2 chisel tip, of the soldering iron, frequently? Used rosin solder flux?

Center pin wire (Positive), of harness cable TO DC Power Jack, was soldered to the center pin of the DC Power Jack?

Negative wire of cable TO DC Power Jack, was soldered to the inside shell of the DC Power Jack?
(Cylindrical shell, inside the DC Power Jack, that surrounds the center pin of the jack)

Sure there are no cold solder joints?

Not trying to 'browbeat' you, just am curious.

1) IF you are SURE you have the polarity correct, of the wires in the harness cable, that goes to the DC Power Jack;

,and you are SURE there is no broken wire, in the cable from the AC adapter (Charger) TO the DC Power Jack;

,and you are sure you made good solder joints;

I suspect the power correcting chipset on the motherboard, to be bad, or perhaps a Diode.

One example of the chipset I am referring to. This one is used in a lot of laptops. May not be used in yours, but gives you something to refer to when looking for a bad chipset, in the power stage, on your motherboard,

https://docs.google.com/viewer?a=v&q=cache:oER5NNz8cwcJ:www.fairchildsemi.com/ds/FD/FDS6675BZ.pdf+Fairchild+FDS6675BZ&hl=en&pid=bl&srcid=ADGEEShOhWPjm_M-ROHme4iEMrztCTOd-28jNiy1hVLQQh_VOyv8zcXEVDB_iTQA6MuZO88UmRkDgjyW9j4CP2aIJ-4DS-h6JNM3lvxldeApQeecmz_DADCw1s7tmNLxfPknqX14SZP6&sig=AHIEtbS_rYUAeo_8rB9YHkW05ZjLqeH4Jg

Usually when bad the top of the chipset will be blackened, or bubbled.
A Diode is a one way valve for electricity. When they go bad it is visually obvious.

http://www.mouser.com/ProductDetail/Vishay-Semiconductors/BA479S-TAP/?qs=j6bfm3UnQnzfWUXqYnsQ9LdHLayQ%2fSwFGlGUXEDAB5w%3d

Post your findings in a Comment.
Regards,
joecoolvette

Jun 10, 2012 | Acer Aspire Computers & Internet

1 Answer

Total Power Failure When Using the AC Adapter


1) Check the AC adapter. Use a multimeter set to DC Voltage, (Symbol is a dotted line over a solid line)

You aren't checking for voltage output, so much, as you are checking for an intermittent break.

AC adapter plugged into power, and probe leads of the multimeter touching the plug of the AC adapter going to the laptop, have an assistant gently wiggle;

1) First the power cord going to the AC adapter.
2) Then the cable from the AC adapter TO the laptop.

If you get an intermittent reading on the multimeter, you have a broken wire in the AC adapter cable, or power cord.

2) If the AC adapter shows VERY close, to the voltage it's supposed to be putting out, AND there is no intermittent break, go to the DC Power Jack.

[ A economical multimeter can be purchased for around $8 to $12.
Available in a multitude of stores. An auto parts store is but one example.

Analog, (Meter with needle), or digital is fine.

Multimeter's vary in style.
It will have a Function knob in the center. This is turned to DC Voltage.
As stated, if just a symbol, it is a dotted line over a solid line.
IF, there is more than one DC Voltage scale, set it to the 0 - 50 Volt scale.

The red probe lead is the Positive lead.
The black probe lead is the Negative probe lead.
You are testing DC Voltage. There is a Positive, and a Negative.

The plug of the AC adapter, that plugs into the DC Power Jack on the laptop, will have a Positive connection, and a Negative connection.

Plugs vary. The most common is a plug with a center hole, and a surrounding metal cylindrical shell.

The Center hole is Positive.
The outer cylindrical metal shell is Negative.

Need more advice post in a Comment ]

Depending on what laptop we are discussing here, the DC Power Jack can be soldered directly to the motherboard, OR it has a cable attached to it, and the cable plugs into the motherboard.
(DC Power Harness)

IF, it is the solder to the motherboard type, it has prongs, or pins, that come out of the bottom of the DC Power Jack, and goes through the motherboard. Then the prongs, or pins, are soldered to the motherboard.

With this style, if the DC Power Jack is bumped, the solder joints of those pins, may be cracked. Makes a bad contact.

Could also be bad enough to make a Short. (Laptop turns off when AC adapter is plugged in)

The DC Power Jack itself may be in bad repair.
Using as an example of the style that has a Center hole, and a surrounding cylindrical metal shell, (Inside), if the two parts touch, you can have a Short.

The diagnoses is to start with removing ALL power, AC adapter ('Natch), and Battery.
See with a small wooden object, if you can gently wiggle the DC Power Jack.

ANY perceptible movement means a bad DC Power Jack.
You will also have to partially disassemble the laptop, to check the DC Power Jack solder connections, to the motherboard.

3) DC Power Jack checks out, the problem has gone serious.

Mounted to the laptop motherboard is a power controller chipset.
It is a power MOSFET,

[ Chip and Chipset are slang terms for I.C.
Integrated Circuit,

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

The power MOSFET is a type of I.C.,

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

If you open the laptop, and view the motherboard, this problem will be readily apparent. This chipset usually burns, and turns blackish.

Problem is when it does, the manufacturer's ID numbers are hard to read, in order to obtain a replacement ]

This is one power controller chipset that is used in a LOT of laptops,

https://docs.google.com/viewer?a=v&q=cache:oER5NNz8cwcJ:www.fairchildsemi.com/ds/FD/FDS6675BZ.pdf+Fairchild+FDS6675BZ&hl=en&pid=bl&srcid=ADGEEShOhWPjm_M-ROHme4iEMrztCTOd-28jNiy1hVLQQh_VOyv8zcXEVDB_iTQA6MuZO88UmRkDgjyW9j4CP2aIJ-4DS-h6JNM3lvxldeApQeecmz_DADCw1s7tmNLxfPknqX14SZP6&sig=AHIEtbS_rYUAeo_8rB9YHkW05ZjLqeH4Jg

This is another one,

http://html.alldatasheet.com/html-pdf/85156/VISHAY/SI4925BDY/183/1/SI4925BDY.html

Both of these chipsets uses a D2PAK surface mount.
The leads are bent into a J shape. ( J Lead)

The 'foot' of the J lead is soldered to a copper pad on the motherboard.
(Copper Pad has a thin gold plating on it)

Simple de-soldering/soldering techniques, are used to Remove the chipset.
HOWEVER, use a Heatsink on EACH J lead, when soldering the new chipset in.

http://www.radioshack.com/product/index.jsp?productId=2103242

(The power MOSFET has transistor/s inside )

OR, replace the motherboard.

For additional questions please post in a Comment.

Regards,
joecoolvette

Feb 12, 2012 | Computers & Internet

1 Answer

Broken power plugin port


The power plug in port you refer to is the DC Power Jack.

The AC adapter (Charger) converts AC electricity into DC electricity.
DC electricity has two poles. Positive, and Negative.
(Just like on a D cell flashlight battery)

The center pin of the DC Power Jack is the Positive connection.
The outer metal spring-like pieces, on the inside of the cylindrical shape surrounding the center pin, are the Negative connection.
(The pieces of spring-like metal, all connect to the Negative connection in the DC Power Jack)

Example of a replacement DC Power Jack, for the Asus Eee PC 1005HA Netbook,

http://www.batterysupport.com/asus-eee-pc-1005ha-jack-p-303527.html

[ Note*
Cannot agree with the replacement instructions they offer, at the bottom of the page.
Not everyone has access to a hot-air gun. A 25 Watt soldering iron, and Desoldering Braid, is better, and more easily accessed ]

A few articles dealing with replacement of a DC Power Jack,

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

http://www.laptoprepair101.com/laptop/2006/01/28/toshiba-satellite-m35x-a75-power-jack-problem/

http://www.laptoprepair101.com/laptop/2006/05/27/failed-laptop-power-jack-workaround/

1) Remove ALL power. Remove the AC adapter, (Charger), and Battery.
2) Observe Anti-Static Precautions. Buy, and use an ESD wrist strap.
Electro Static Discharge.

(Average cost is from $3 to $6. Connect the alligator clip to a good ground source.
I connect to an unpainted surface, of the metal frame of an open, empty desktop computer case.

If you wish to proceed in replacing your DC Power Jack, and need guidance, post back in a Comment.

Regards,
joecoolvette

Dec 01, 2011 | ASUS Eee PC 1005HA-PU1X-BK Netbook

1 Answer

Broken central pin on power jack of Asus Eee PC 1015ped


I realize I'm providing a solution to an older problem, and may never hear back from the original poster.
I am providing a solution because in the event it may help someone else.

The center pin you state is part of the DC Power Jack. The jack on the laptop, that the plug from the AC adapter (Charger) plugs into.

The center pin is the Positive connection.
The outer metal pieces, on the inside of the cylindrical shape surrounding the center pin, make up the Negative connection.

http://www.lapdiy.com/asus-eeepc-eee-pc-1015ped-netbook-dc-power-jack-connector-p-581.html

Click on the two views shown of the jack to enlarge.
The view on the left, shows how the jack normally sits on the motherboard. Front faces you, and in upright position.

The view on the right shows the jack upside down, and the back faces you.
Note the 4 metal tangs which protrude up. Each has a squarish hole in it.

These tangs go through the motherboard, and are soldered to the motherboard. These tangs are Negative connections.
They connect to the metal pieces inside the cylindrical shape.

Looking at the Back of the jack, (Right view), you see a metal tang coming out of the center.
This tang is the Positive connection. It attaches straight to the Center Pin.

To replace the DC Power Jack, the Eee needs to be completely disassembled down to the motherboard in your hands.

(Observe Anti-Static Precautions. Use an ESD wrist strap. Average cost is around $3 to $6. Connect the alligator clip to a good ground source.
{ I connect to an unpainted surface, of the metal frame of an open, empty desktop computer case )

The broken DC Power Jack is c-a-r-e-f-u-l-l-y removed from the motherboard, and after the area is prepped, the new DC Power Jack is soldered into place.

http://www.youtube.com/watch?v=_2htZGio8es&feature=related

Regards,
joecoolvette

Oct 20, 2011 | ASUS Eee PC 1005HA-PU1X-BK Netbook

1 Answer

My Q430's power connection is loose and not changing battery. Do I have to swap out motherboard?


The DC Power Jack is the jack you plug the AC adapter (Charger) into. (DC_IN)
The DC Power Jack for the Samsung Q430 series of Notebook PC's, consists of a;
1) DC Power Jack, which is connected to two wires.
2) The wires end in a small male plug connector.
It is now a DC Power Harness,
http://www.laptopjacks.com/part/Samsung-Q430-DC-Power-Jack-J-SM371300C1.html
FOLLOWING Anti-Static Procedures, the laptop is disassembled far enough to unplug the DC Power Harness, and plug a new one in.
Regards,
joecoolvette

Sep 10, 2011 | Samsung Q430 Laptop

1 Answer

I have a hp pavilion dv7 and the power socket has come a lose i need to know which wire goes where.....


The DC Power Jack that the AC adapter (Charger) plugs into?

Look into the DC Power Jack with a magnifying glass and light you'll see it's a center pin surrounded by a barrel. Barrel has an inside and an outside.


1) Center pin. Gold and buried down in the plastic. Connected to WHITE wire at motherboard connector.

2) Inside barrel has 4 Brass fingers.
Orient the laptop so the LED is at 12 o'clock and you'll see fingers at 12, 3, 6 and 9 o'clock.

These fingers carry the + 19 volt power to computer.
The ones at 6 and 9 o'clock do, Noon and 3 are not connected.
+19 Volt power arrives at motherboard connector on RED wire.

3. Outside barrel has six brass fingers, at 2, 3, 4, 8, 9 and 10 o'clock.
2, 3, and 4 are not used,
2, 8, 9 and 10 are the power return (common, or ground) to computer.
It arrives at motherboard on BLACK wire.

4. LED is connected to YELLOW wire and controlled by computer.
Other side of LED is jumpered to a Black wire,(Ground), outside barrel 8, 9, and 10 o'clock.

From > analog posted in an HP Support Forum.

Nov 12, 2010 | HP Pavilion dv1000 Notebook

1 Answer

I need to remove the back to my gateway my6821 to expose the dc jack...my computer just stopped powering up. I get nothing no fan no light nada


The solution I've found is simple.
No need to disassemble computer.
The DC jack will over time crack the solder on the center pin through the pc-board and lose continuity.
First remove the keyboard cover by removing 2 screws (on rear under hinges) and gently prying upward beginning at hinges. Directly under where the power button was and beside the actual power switch find the solder connections for the DC jack. (The jack is on other side of board. You are seeing the bottom of board).
Examine all jack connections for cracked solder around the pins. a magnifying glass helps. Usually it is just the center pin which is toward the rear of the jack, obvious cracking causes intermittent connection or no connection.
If you have no experience soldering I recommend you leave this task to someone who does.
Carefully apply rosen core solder to pin(s) using proper fine tip iron. heat thoroughly til pin moves in hole then apply fresh solder. Be quick. Not too much solder, not too much heat. Be careful not to allow iron's barrel to touch plastic case or tip to build solder bridge to any other connection.
Problem solved.
jamespaulhunt@yahoo.com

Sep 05, 2010 | Gateway MT6821 Notebook

2 Answers

No connection with the DC Jack on Gateway 3550GZ


It's time to take the computer to a qualified technician, for proper trouble-shooting & repair, because there are very-few "user-repairable" parts inside a laptop/notebook computer.

Jan 20, 2010 | Gateway 3550GZ Notebook

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