Question about Sony VAIO PCG-K23 Notebook

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My laptop does not power up

There;s power from the dc jack but does not want to power up. I changed the battery, the power switch and flat ribbon cable that connects to the power switch,

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  • alc03 May 11, 2010

    Do you ear anything, nothing absolutly nothing comes on the screen, you don't ear any fan, no green light anywhere ?

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Sorry I mist somethig when I first read your message, but if you can see light, but noting on the screen, chance are that you have memory problem, just check under the laptop there is plates you can take off one of them is the memory chips that are cliped in, try clean the memory slots and stick, if no change try change the memory slots if nothing better come back we'll see what to do more. Thanks

Posted on Sep 03, 2009

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The most likely solution would be that your motherboard will have to be replaced. Video cards in laptops can also cause this to happen, but most laptops have the video cards integrated directly onto the motherboard, so to replace one, you'll have to replace both. There are lots of videos on youtube about replacing motherboards in laptops, I'm sure there is one for your model that you can use as a guide. Newegg.com often has the best prices for my company. Short of doing it yourself, you'll have to take it somewhere or send it back to the manufacturer (read pay lots of money) to get it done.

best of luck.

Posted on Sep 03, 2009

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2 Answers

Bad dc jack or motherboard?


Possibly the motherboard. I have no data on voltages as HP didn't allow that sort of information.

Apr 26, 2014 | Compaq Presario CQ62-215DX Laptop

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Hi when plug in my ac adapter into lenovo x61 the tablet will not turn on i try it on other computer and it will on what happen?


LOL, sounds like your tablet has seen it's better days. See why HP got out of the Tablet business? They are nothing but trouble.

Apr 08, 2012 | Lenovo Tablets & eReaders

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

2 Answers

I have an Acer Aspire One and when I plug the charger in I have to spin it or wiggle it or both to get the battery to charge. Once I have it in position it generally stays on charge, but if the cable is...


It could be either one Sarah.

The AC adapter's (Charger) cable, or the DC Power Jack where the AC adapter plugs into the laptop.

This is an example of the DC Power Jack not installed,

http://www.laptopjacks.com/view_part/Acer-Aspire-ONE-AOA150-ZG5-DC-Power-Jack-AC351816.html

(You can click on the three views of the jack to enlarge)

1) Check the DC Power Jack to see if it's in good repair.

Battery removed use a small flat tipped screwdriver, and Gently see if you can move the Center Pin around in the jack.
See if the Center Pin will move side to side a small amount. There is supposed to be No perceptible movement.

Referring back to the closeup photos of the DC Power Jack, the flat blade-like prongs are upside down, in relation to how the jack sits on the motherboard.

The flat prongs go down through the motherboard, and are soldered to the motherboard.
If the center pin of the jack is stationary, but the jack as a unit moves around, one or more solder joints, (Connections) for the flat prongs may be cracked.

The repair consists of completely disassembling the laptop, removing the broken DC Power Jack, and installing a new one.

Acer Aspire One service manual,

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

(Click on the blue - One - in Aspire One.
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 file name (One) it may take up to 30 seconds before you see the first page.
It may also take additional time for the file to fully download.

(Took 12 seconds just now for full download)

No perceptible movement of the DC Power Jack? Suspect the cable of the AC adapter right near it's plug. (Plug that plugs into the DC Power Jack)

For additional questions please post in a Comment.

Regards,
joecoolvette

Jun 25, 2011 | Computers & Internet

1 Answer

Gateway kav60 not charging. i have to wiggle the cord and sometimes it refuses to charge.


I guess you've got a broken laptop power dc jack or power cable.


Symptoms of a broken Laptop DC power jack:


- The laptop only operates when you hold the DC power plug in a certain direction (DC jack is broken or loose).
- The laptop only runs on battery power (no power is getting through the DC jack).
- The laptop gets no power at all.
- The laptop will not charge the battery.
- The laptop switches from AC power to battery power intermittently due to a loose or broken power jack.
- The laptop suddenly shuts off.
- The DC jack may feel loose.
- Sparks come out of the back of the laptop when you insert the power plug into the DC jack.

Apr 21, 2011 | Lifetime Gateway KAV60 Replacement Laptop...

1 Answer

Dc jack of labtop getting vey hot


A common weak spot on most laptops is the DC power jack. If someone trips on the wire while you have the power adaptor plugged into your laptop, chances are that the power jack will get damaged.
On most laptops the DC power jack is soldered directly to the motherboard and there are only three or four small pins holding it in place. Unfortunately that makes the power jack quite weak. Any sideways pulling of the DC power cord while attached to the laptop will usually dislodge at least one of these pins, breaking the solder around it. Modern laptops use quite a lot of power, from about 70W to 120W or even more. The bad electrical connection from the dislodged pin will cause sparks and heating that will eventually burn a hole through the motherboard and can even be a fire hazard.

The usual signs of that are:
  • The battery is not charging properly or stays at half charge despite that you have been using the power adaptor.
  • The screen flickers (the brightness is changing) while the power cord is plugged in. This is caused by the laptop switching between DC power (screen is brighter) and battery power (screen is dimmer).
  • The DC plug gets hot after a few minutes of use and may even smell of burning.
  • There are "scratching" sounds coming from the DC jack.
You need to take the unit apart and check/resolder the DC jack on the system board.

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

Feb 15, 2011 | Computers & Internet

3 Answers

No power! power cord is good, but when inserted in the charging jack(laptop) the inside is loose and no charge is being sent to the battery. How do I replace the inside thing so power can be sent to the...


Here below is a guide about how to repair laptop DC jack, may it will help.
http://www.laptoprepair101.com/laptop/2007/12/06/dc-power-jack-repair-guide/

Jan 20, 2011 | Balance Computers & Internet

6 Answers

Will not hold charge, touch power cord on back or move it any way and the computer shuts off, the third light bar on front of computer keeps flashing between red and green


DC Power Jack is bad, or it's solder connections to the motherboard.

To explain;
The DC Power Jack is the port you plug your AC adapter into. (Charger)

Your DC power jack Not installed looks like this,

http://www.megaemarket.com/dc-power-jack-for-dell-inspiron-laptop-b12120130.html

(You can click on the photo to enlarge)

Looking at the jack in the photo, it is upside down in relation to how it actually sits, on the motherboard.
Those flat pins you see go down through the motherboard, and are soldered.

As I'm sure you know, your laptop uses DC electricity. (Direct Current. A flashlight battery, and your laptop battery are examples of stored DC electricity. The AC adapter converts AC electricity into DC for the laptop)

The round metal pin in the center is for Positive. It is the Positive connection. The outside round hole has the Negative connection. (For this jack I believe it is a flat strip of metal going down the side of the hole)

What you can't see is that the body, or outside shell of this DC Power Jack is composed of Plastic. Looking at the photo, look at the rear view of the jack. The view on the right of the photo.
That metal center pin is riveted to the flat pin. (Or Prong, if you wish)

Doesn't take too much of a bump, when the AC adapter plug is installed into the jack, to break the plastic at this point.

However your jack may not be broken. It could be cracked solder joints. Solder joints where those flat pins are soldered to the motherboard.

I apologize for being so lengthy, but unless you repair these babies, you may never know this information, and I thought I would share.

I wanted you to know what the problem is.
It is my belief without looking at this laptop, and based on many repairs, that your DC Power Jack has cracked solder joints.

Only a professional, competent, tech will know for sure when they go to repair it. If the above is the case they will re-solder the joints.

Repair cost? This cost varies from city to city, and country to country. I could only hazard a guess.

In my area it varies from $50 on up. (The cost of the jack online is about $9 should one be needed)
(The entire laptop needs to be disassembled down to the bare motherboard. {The LCD screen stays intact} Then work on the jack can ensue)

Nov 09, 2009 | Dell Inspiron B120 Notebook

1 Answer

Acer 5920g no power


Your DC Power Jack is bad, or the area of the motherboard where the DC power jack attaches to, is bad.

The DC Power Jack, is the small port where your AC adapter,(Charger), plugs into.
This is an example of an average DC Power Jack, for an HP Pavilion laptop, not installed in a laptop yet,
http://www.megaemarket.com/dc-power-jack-hp-pavilion-ze4200-zt117420011721182125.html
If you click on the photo it will enlarge.

The DC Power Jack in the photo is upside down, in relation to how it sits on your laptop's motherboard.
Those flat metal pins shown on top, go down through the motherboard, and are soldered on the other side.

1.Sometimes when the 'charger' plug is in the jack, and is bumped, it can crack the solder joints for the DC Power Jack's flat pins. This makes an intermittent contact. Eventually there is no contact at all.

2.Sometimes it's a bad design of the DC jack, and just from ordinary usage of the user plugging in the charger, and removing it, this can crack the solder joints.

3.Sometimes the small area of the motherboard where the DC power jack is mounted, can crack away from the main body of the motherboard.
To explain:
Crude example;
Envision a laptop's motherboard as having a 1 foot square shape. (It isn't. It's irregular shaped) Now on one side attach a 2 inch square. This 2 inch square, represents the area that the DC power jack is attached to. A 'Peninsula', if you will. There are circuit traces that go along a motherboard. Think of them as Very, flat, thin, strips of copper wire. These 'wires' become stretched, and break as the 'peninsula' cracks away from the main body of the motherboard.

Solution?
Have the DC Power Jack replaced, or the motherboard.
DC Power Jack cost? About $6 to $8 dollars.
Labor? $100 to $150.
The tech has to completely disassemble the laptop, to just the bare motherboard in hand. Then unsolder the DC power jack, resolder a new one in, and reassemble the laptop.
Motherboard cost? About $150 on up. Depends on where you obtain it. (Ebay?)
Labor? $100 to $200.

Jul 12, 2009 | Acer Computers & Internet

1 Answer

No ac power but plugged in


If you plugged in the ac adapter, and you still get no power and cannot turn it on, the first thing to check is the AC adapter. Get a voltage meter, set it to 200 DC, put the positive on the inside and the ground on the outside. Unless you have a highpower alienware laptop, it should read +/- 20 V, most likely 19.xx. If your AC adapter is good, then the DC jack, what the adapter plugs into, is bad. In this case, the laptop will have to be disassembled, the mother boared removed, the old DC jack de-soldered and taken off, and a new DC jack soldered on. You would really need to take it to a qualified techninician at a shop to di it.

Mar 21, 2009 | Acer Aspire 5100-5022 Notebook

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