Dc power jack short circuit - Sony VAIO VGN-NR360E/S Notebook

A) AC adapter (Charger) is bad.
Use a multimeter, and check it out.

[ DC Voltage.
Test plug of cable that plugs into laptop.
Positive (Red) probe lead of multimeter, to Center Hole of plug on AC adapter.
Negative (Black) probe lead touches outside cylindrical metal shell.
You should read close to 19.5 Volts (DC) ]

AC adapter checks out OK?

B) DC Power Jack is bad

[The DC Power Jack is the port on the laptop, that the AC adapter plugs into. On laptop may be marked DC_IN ]

Damage to DC Power Jack prevents laptop from charging, or running strictly off of the AC adapter.

Battery removed take a No.2 pencil's eraser, and see if you can gently move the Center Pin, of the DC Power Jack.
ANY perceptible movement means replacement of the DC Power Jack.

The pin itself may not move, and the entire jack moves.
The good news is the DC Power Jack is not soldered to the motherboard.
It is soldered to a separate, therefore replaceable, small circuit board,

http://www.parts-people.com/index.php?action=item&id=3698

Click to enlarge. In the photo the DC Power Jack is at the back on the right.
This is is what the DC Power Jack, looks like not installed on that small circuit board,

http://www.elept.com/dc-power-jack-for-dell-inspiron-xps-m140-m1710-m1210-m2010_p2971.html

Looking at the view on the right, note the pins sticking out.
You are looking at the back view, and the jack is laying on it's side.
The pins go through the laptop's motherboard, and are soldered to the motherboard.

Where the pins are soldered to the motherboard is a solder connection. Commonly referred to as a Solder Joint.

Plugging in, and missing the hole of the jack, can cause the AC adapter plug to damage the DC Power Jack, by bumping into it.

Bumping into the plug of the AC adapter, while plugged into the DC Power jack, can cause damage to the jack.

Can cause cracking of the above mentioned solder joints. This leads to an intermittent contact, and eventually no contact, of the DC Power Jack TO the motherboard.

In this case the solder joints are just re-soldered.

Damage to the body of the jack itself means replacement of the DC Power Jack, or replacement of the USB/DC Power Jack circuit board, itself.

(Unless you, or an acquaintance can un-solder, and solder real well, the option may be to just replace the USB/DC Power Jack circuit board)

DC Power Jack proves to be OK?

Problem is one, or more Power MOSFETs on the motherboard.
These determine if the Battery needs a trickle charge, or a full charge, or no charge at all.
Also determines if the laptop is to just run off of the AC adapter, and not the Battery.

This example is for HP Pavilion dv6000 and Pavilion dv9000 series of Notebook PC's. You can use it for cross-reference information.
(Location of the Power MOSFETs on your laptop's motherboard. General idea of what they look like ),

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

What? Looks like motherboard replacement to you?
OK
Let's price a Fairchild Semiconductor International - FDS6679 - Power MOSFET,

http://www.mouser.com/Search/Refine.aspx?Keyword=FDS6679

If you buy one the cost is $1.01 USD

Look to see if the Power MOSFET/s are burned. Blackened, bubbled, or blistered.

There is one more small component, that if bad will produce the same results;
Ceramic Capacitors.

Look back at the Mayohardware blog. Look at the second photo down with the AO4407 Power MOSFET circled in Yellow.

Note the small rectangular shape to the immediate right, that has the wide dark band on it. There is one above it, one above that, and one to the right of the top one.

See if any of these, (No matter what the size. Look at all of them), are burned. Blackened, bubbled, or blistered.

http://www.mouser.com/Passive-Components/Capacitors/Ceramic-Capacitors/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT/_/N-b2cj?P=1z0wquyZ1z0t6fg

NOT stating these are ones to use. Just showing average cost.
.42 to .76 cents USD. Approximately a half dollar to three-quarters of a dollar.

Motherboard?

Average example,

http://www.amazon.com/Dell-Inspiron-M140-Motherboard-HC425/dp/B001155N0U

$200 USD

Average example of the -> package type of the Power MOSFETs used,

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.youtube.com/watch?v=5uiroWBkdFY&feature=fvwrel

You don't need a Soldering Station. A low Wattage soldering iron, and that tip.

http://support.dell.com/support/edocs/systems/xps140M/en/sm/index.htm

Regards,
joecoolvette

When the short happened it caused a feedback in the power supply charger, I would sub out the power supply with a replacement as a first important step to see if the laptop will come back online.

It is most likely the DC connector. Take it off the system board and clean the solder joints, then replace it.


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. Happy Holidays!

Thanks, Joe

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

The jack on the laptop that you plug the AC adapter (Charger) into, is called a DC Power Jack.

http://www.laptopjacks.com/view_part/Dell-Inspiron-9300-Laptop-DC-Power-Jack-DL111500.html

I would like you to click on the photos of the jack. (3 views shown. Has www.laptopjacks.com on it)

The middle photo, and the photo to the right, shows copper prongs that protrude out of the jack.

The view to the right shows the jack upside down, in relation to how it's mounted on the motherboard.
The prongs go through the motherboard, and are soldered to circuit traces on the motherboard.
(For simplification, think of circuit traces as being very thin flat copper wires on the motherboard)

There is data stating that the solder joints have a tendency to crack, even with normal usage of just plugging, and unplugging the AC adapter.
It is also stated that the motherboard area where the DC Power Jack is mounted, is of a bad design.
Many have had the motherboard replaced, ($400 to $500), only to have the same problem come up later.

It has also been stated that the manufacturer states replacing the AC adapter, but has been shown to no avail in solving the problem.
Same thing comes up for the Dell Inspiron e1705.
(I know, I'm just a 'Ray of Sunshine')

A cracked solder joint, or cracked solder joints make an intermittent contact. When the DC Power Jack is in a certain position with the AC adapter plugged in, the contact may be good. Moved around by plugging in the AC adapter again, the position may change, and result in an intermittent contact, or no contact at all.

Result?
Laptop will not power off of the AC adapter, nor will the AC adapter charge the battery.
This is the reason why the laptop will run straight off of the battery, but the battery isn't being charged back up.

It could also be that the damage is further than a cracked solder joint, or cracked solder joints.
One of the prongs could have come loose from it's mounting, and no longer be attached to the pin it's supposed to be attached to.

[ The AC adapter converts AC {Alternating Current} electricity from your household, or business, into DC electricity.
{Direct Current. Batteries are an example of stored DC electricity}

DC uses two connections. A Positive connection, and a Negative connection.
One of the prongs is for the Positive connection, another one is for the Negative connection. The other prongs are used for stability, to mount the DC Power Jack in place to the motherboard. Generally the center pin/s are for a Positive connection, the outer pin/s are for the Negative connection ]

Unless I had the laptop in my hand, I can only give you a generalization of what may be wrong, and the possible solution to repair it.

1) All power to the laptop removed, (AC adapter and Battery), see if you can wiggle the DC Power Jack around. Any perceptible movement is bad.

2) Past this point the laptop will have to be completely disassembled, down to the bare motherboard in your hand. Requires visual inspection of the solder joints for the DC Power Jack, and the surrounding circuit traces.

It may be something as simple as resoldering a cracked solder joint. (Or joints)
It may go further into replacing the DC Power Jack.
It may still go further if the area on the motherboard where the DC Power Jack is mounted, has cracked.

You or a tech may not be able to mount a new DC Power Jack.
This would require a workaround, IF feasible. Won't be aesthetically appealing, however.

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

Dell Support > Inspiron 9300 Notebook PC > Service Manual,

http://support.dell.com/support/edocs/systems/ins9300/sm/index.htm

Older Dell Inspiron 1300 laptop, but linked to show you more about replacing a DC Power Jack, and the required 'little things'. Such as properly cleaning the solder joint area on the circuit trace, that a prong for the DC Power jack, goes through, and is soldered to.

http://www.insidemylaptop.com/remove-motherboard-repair-dc-power-jack-dell-inspiron-1300-b120-b130-laptop/

You may find this useful also,

http://www.coredatarecovery.com/how-to-repair-a-bad-power-jack-on-a-dell-inspiron-51501100-series-laptop-for-under-2000/

Click on - Dell 5150/1100 series Slideshow
(Author Charles House)

1) Buy an wear an ESD wrist strap. (Electro Static Discharge) The average cost is around $3 to $8.
Connect the alligator clip to a good ground source. I connect to the metal frame of an empty desktop computer case.
Observe Anti-Static Precautions.

[Your body carries static electricity. Static will fry out (Short Circuit) the hardware components inside a computer. Wear the ESD wrist strap, and connect it to a good ground when working on the laptop.
Should you leave in the middle of working on your laptop, upon your return be SURE to put the ESD wrist strap back on ]

2) There may be as many as 60 screws, and 12 different types of screws. Do Not mix them up.
Use a multi-compartment container for the screws. Mark each compartment for the area the screws came out of. Do not stack them neatly on a table. Recipe for disaster.
You can use a clean egg container in a pinch. Mark each egg holder.

3) Use Solder Wick, (Desoldering Braid) to remove the old solder. Do not use a Desoldering Tool.

4) Make sure the area of the circuit trace that you have removed solder from is CLEAN. The links above will detail more about this. Make sure the circuit trace areas are pre-tinned with solder, before inserting the DC Power Jack's prongs. Don't worry if the hole in the circuit trace is covered with solder from tinning.
You can heat it up to insert the prong. (One prong at a time)

5) DO NOT linger too long with the soldering iron, (40 to 50 Watt) This can render a circuit trace useless.
It will burn it, (And the motherboard), and render the circuit trace useless from accepting the tinning.
(Solder it applied to the area to be soldered in a light coat. = Tinning)
Linger too long, and you can lift the circuit trace right off of the motherboard.

For further questions please state in a Comment.
Regards,
joecoolvette

there is short circuit in motherboard if your adater have small led and if LED off when you inseting power jack that means short circuit in dc to dc controller or VRM section on your motherboard

Yes you can replace the power adaptor. You may also remove the solder from the existing adapter and re-solder it back on which is what I did. If you just want to replace it I suggest Ebay before I repaired mine I ordered a new one for $5 w/ free shipping.

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/

1.ESD wrist ********, connected to a good ground, work on a table.

2.Remove the AC adapter if plugged in, and the battery.

3.Completely disassemble the laptop, down to just the bare motherboard in your hand.

4.Use your soldering station, and I advise using a soldering wick instead of a desoldering tool, on the DC Power Jack leads. Works much better.
Remove the old DC Power Jack, being careful to not burn the motherboard, lifting the circuit traces, and rendering the motherboard useless.

5.Clean the DC Power Jack mounting area with Isopropyl Alcohol, and Q-tips to remove the residue. [WARNING! Isopropyl Alcohol is =>Extremely Flammable. I use the 91% Alcohol version]
Make sure the circuit trace mounting hole has a good tinned surface.

6.Install the new DC Power Jack in the circuit trace mounting holes. CAREFULLY apply solder to the DC Power Jack leads, and be sure to make good solder joints.

7.Reassemble the laptop

Sorry, I don't have access at present to Fry's GQ line of laptops for a Maintenance and Service Manual, to give you a link.

Should be battery first, Then AC adapter (Charger)

Dead short on DC Power Jack?
Are you aware of how a DC Power Jack is made, (Component structure), and how it attaches to the motherboard?

If not, allow me to explain. This is an example of an average DC Power Jack,
http://us.st12.yimg.com/us.st.yimg.com/I/yhst-42877593004970_2046_1336946

The outside housing of the DC Power Jack, is barely larger than the outside of the AC adapter (Charger) plug.
It's about a 1/4 inch wide, 3/8 inch inch tall, and 1/2 inch long.
The body is made of plastic.

The outside shell opening in the body is the Negative contact.
The pin in the center is the Positive contact.

Those flat metal prongs, or pins, you see in the photo, go down through the motherboard, are are soldered on the bottom side.
The photo of the jack is upside down, in relation to how the jack sits on the motherboard.

When the 'Charger' plug is plugged into the power jack, it can get bumped. A hard enough bump, or repetitious bumps can damage
the center pin mounting, break the outside metal shell loose, and/or break the plastic housing.

It can also break the solder joint/s for those flat metal pins.

AC adapter unplugged from the laptop, battery removed, see if you can take a pencil eraser, and move that middle pin around. You may see the entire jack move.

There is also a large number of laptops, made with a defective motherboard design. To explain, I'll have to give you a crude example.

Think of the laptop motherboard as being a 1 foot square. (It isn't. It's irregular shaped)
Now along the edge of the 1 foot square, attach a 2 inch square.
It's actually all one piece.

Due to accidental bumping of the 'Charger' plug while in the power jack, this 2 inch 'Peninsula' can break away from the main body of the motherboard. (1 foot square)

There are circuit traces on the motherboard. (Think of a circuit trace, as a Very, Flat, Thin, copper wire)
These circuit trace can become stretched by the cracking, or breaking away of the 2 inch 'Peninsula'. They can then be exposed to circuit traces they're not designed to touch. This can cause a direct short.

(Also, due to the bad design of these motherboards, the laptop user can be just using the 'Charger', in an everyday situation, and this 2 inch 'Peninsula' can break.
Just by plugging in, and unplugging)

most case cause DC jack connection is not stable or damage
you may try
1) to open cover find out the DC jack 2 or 3 pins on the motherboard then to fix it use iron and flux.
2) check any disconnection DC/DC circuite near the jack
3) repleace the new jack if the jack damage