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Looking for manual or instructions for disassembly/reassembly so that I can replace the damaged power jack.

Trying to find a service manual or at least instructions on disassembly/reassembly of a Balance Digital laptop model CN6555/557S.

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  • Computers & ... Master
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I repair a lot of laptops. I have found through the years, that they all seem to follow a basic disassembly pattern. Although access to the cooling tube/heatsink/fan combo, and processor, for some of the laptops, is through the bottom, it is just for those hardware components.
To disassemble these type of laptops, you still have to come down from the top.
One laptop I have so far not had the fortune of working on, is a Balance Digital Technology laptop.
I 'googled' a few models just now, and they look to be the same as many HP, or Compaq, or IBM, or Toshiba, or on and on, models I have worked on.

The first thing you need to do, is remove the AC adapter, (if plugged in), and the battery.
Then turn the laptop over, and remove the harddrive, the memory compartment cover, and memory modules, (ram sticks), and any other removable compartment cover, or removable device.

I use a clean egg carton, and label each egg holder as to where what area, the screws came from, and put the various screws in these egg holders. There may be as many as ten or more, different types of screws, and could be up to 50 screws or more.
(Doesn't sound very 'Techie', huh? I work on a lot of laptops, and can just throw these egg cartons away when done)

I also suggest you use a digital camera, or video camera, and good lighting, as you go along. (If available) Helps to reference later as to what went where, and in what order. I also suggest making notes and drawings. Make them legible enough so that you will understand them later.

Turn the laptop over to it's normal position. There is a plastic strip above the keyboard. It's under the LCD screen. This strip may have speakers in it, and/or LED lights.
This plastic strip has tabs going around the edge of it. These tabs keep it snapped in place. I take a flat tip jewelers screwdriver, and ease it in a little bit, where the plastic strip meets the body of the laptop. Just get it under the edge, and carefully pry up. If you can't get it in, move over. You might be right at where one of those tabs are.

You may only be able to ease it up just a little bit, and have to use another small flat instrument to hold this raised part up. Then take your flat tip, and go to another place close to it. Try to pry that part of the edge up.
When the strip first pops up, it comes up with a "Crack' sound. You'll think you broke it, but you could run a truck over this plastic part!
Each time you get the strip up, and a tab comes up, 'Crack'. Kind of unsettles your nerves until you get used to it!

Work around the edge of this strip. Keep popping it up as you go around. Eventually it will come up and off. Look for wires. There are small plastic White connectors. You can ease these little connectors apart with your fingernails. The connectors are different sizes, and have different pins. There's no mixing them up when it's time to reassemble.

The hard part is over now. You should see a screw, or screws to remove the keyboard. It comes up at a 45 degree angle, and is removed at this angle. NOT straight up! After you get it up a little, BE careful! There is a tiny wire harness that the connectors need to be taken apart.

Now you should see a metal shield. This has screws. After this, you remove all the screws you see, and remove all the case screws from the bottom side. Look for 'hidden' screws in the memory compartment area, and the other compartments.

The LCD screen hinges will have plastic covers on them. There may be ascrew that holds each cover on. Most of the time they pop off, like the flat plastic strip did. There will be screws on the front side ofr the LCD screen hinges, and screws on the back side. They may have rubber covers over the screws. They are usally held on with a type of rubber cement. You just take your flat tip, and ease them off.

Posted on Apr 13, 2009

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Posted on Jan 02, 2017

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