Question about Acer Extensa 5420-5687 Notebook

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BROKEN DC JACK

MY DC JACVK BROKE AND I WANT TO FIX IT MYSELF BUT I CANNOT GET THE BOTTOM OFF

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First of all remove all your components ie. RAM, hard drive, battery, CD/DVD drive etc. Sometimes there are screws located in the area where these components are located that secures the top and bottom halves of the case.
I suggest that as you remove the screws from the bottom of the case you take a note where the came from as some of the screws are different lengths.
There may be s strip panel between the top of the keyboard and the LCD screen, remove this first, it will be clipped in place and held with screws from the bottom of the laptop.
Next the keyboard should removed and keyboard cable.
Look closely for screws hidden behind plastic stick on covers, you need to use a sharp thin blade to lift off these covers to reveal the screws behind the covers.
The top and bottom halves of the case is usually held in place with plactic clips, start at an opening and carefully pull apart until a clip releases and the work along that edge to release more clips. Continue along each edge until you separate the case.
The LCD screen is usually secured with screws on the back edge of the laptop and possible with screws near the edge of the motherboard. Take care to disconnect the video connector.
The motherboard needs to be removed from the bottom half of the case so you can access the power connector.
Take careful note where you remove each screw as you need to put them back in reverse order.

Best of luck, have fun.

Posted on Jun 03, 2009

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What the Heck is DC? If you want help you've got to explain yourself better.

I'm assuming you are saying the Internal DC Power Jack which is where the Power Cord plugs into is bad. Well, this will require you to take the laptop apart. Most times the DC Power Jack is soldered onto the motherboard, which means you will have to desolder the old one and solder a new one. This alone will take over an hour just trying to get the old broken one out. You have to be very care so that you don't break the motherboard or damage some other part on the board. Sometimes the DC Jack is in a slot on the board and the Palmrest and Bottom Case helps keep in in place. This type of DC Jack will normally have a cable that plugs into the motherboard.

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I am assuming you mean the DC jack on the motherboard in your laptop?
You can repair it yourself, or take it to a repair shop and pay to have someone do it.
To repair it yourself, you'll need:
1) A new DC jack (though sometimes you can fix the broken one)
2) The disassembly guide to your specific model of laptop. Google the phrase "laptop make/model disassembly" and one should come up pretty quickly. Guides are generally step-by-step with pictures included, and putting it back together is just the reverse of disassembly.
3) A soldering iron and solder. 15-30 watts for delicated boards like a motherboard. Once you've pulled your motherboard out, You can de-solder the broken DC jack from the motherboard (if necessary) and solder the new one on. DC jacks are generally 2-4 solder points and fairly simple to press back on.

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hi there,

you can follow this instruction and try to your laptop to resolved the problem.

A bad connection between DC-IN power jack on the system board and the system board is a very common problem with Toshiba Satellite M35X and Toshiba Satellite A70/A75 notebooks. If your laptop is out of warranty, then you can fix the problem by resoldering DC-IN jack on the system board. If it’s still under warranty, it would be fixed at no charge to you.
Problem symptoms:
  1. Laptop randomly shuts down without any warning.
  2. Power LED and battery charge LED start flickering when you wiggle the power cord or the AC adapter tip on the back or your laptop.
  3. The battery will not get charged.
  4. When you plug AC adapter, the laptop appears to be dead and there is no LED activity at all (DC-IN jack on the system board is broken).
To fix the problem, you have to take your laptop apart, remove the system board to resoleder or replace the DC-IN jack. Toshiba Satellite M35X and Toshiba Satellite A70/A75 disassembly guides will help you to remove the system board. Take a closer look at the power jack on the system board with a magnifying glass. In most cases you get the power problem because of a bad connection between the DC jack and the system board, you’ll see a crack between the DC jack connector and the system board.
Here is an example of Toshiba Satellite M35X power jack. The crack occurs between the DC jack pin and the system board.
satellite-m35x-crack.jpg satellite-m35x-contact.jpg In some cases the connection is good, but the DC jack is bad itself. You can find a new DC jack for Toshiba Satellite M35X and Toshiba Satellite A70/A75 laptops here. Search for DC jack M35X or DC jack A75.
How to resolder laptop power jack yourself.
UPDATE:
Sometimes, after you replace the jack, you can see that the system board doesn’t get power at all. The battery will not charge and the power LED will not light when you plug in the AC adapter. So, here’s a possible explanation.
When a connection between the positive pin and the motherboard breaks (cracks), the power jack gets loose. You can feel it when you plug in the adapter plug. A loose power jack can damage the trace inside the hole in the system board. Take a look at the picture.
power-jack.gif As you see, the positive pin goes through the hole in the system board and you solder it on the top side. Right? What if the trace between the top side and the bottom side is broken somewhere inside the hole? I’ve seen it before a few times. In this case everything looks nice and clean on the top side. When you plug in the AC adapter, you get normal voltage readings between “+” and “-“ pins on the top side, but the power DOESN’T go to the motherboard at all, because there is no connection between the top and bottom sides. Test with a multimeter if there is a connection between the top and the bottom.
If the trace inside the hole is broken you still can fix it. You can run a wire to connect the top and the bottom sides. Be careful not to short something on the board.
Update:
Here’s another solution to fix the power jack problem, it shows how to relocate the power jack outside the laptop base. Check it out here: Toshiba Satellite A75 failed power jack workaround.
When you repair a loose power jack, it’s a good idea to check the jack on both sides of the motherboard. When you remove the top cover from a Toshiba Satellite A70/A75 laptop you can see only points where the jack is soldered to the motherboard as it shown on the second picture in this post, but you cannot see the jack itself as it shown on the first picture.
Removing the motherboard from Satellite A70/A75 laptop is a good idea because the jack itself might has a broken “+” pin, as it shown on the picture below. If the “+” broke off the base, you’ll have to replace the jack.
power-jack-broken.jpg

Feb 15, 2009 | Toshiba Satellite A75-S229 Notebook

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