Notebook Power Jack

problem Toshiba Satellite A75 power jack and battery Toshiba

A bad connection between the power jack DC-IN on the system board and the card system is a very common problem with Toshiba Satellite A75/A70 notebooks. If your laptop is no longer under warranty, you can solve the problem by resolder DC-IN card system. If it is still under warranty, it would be fixed at no cost to you.

Problem symptoms:

1. Laptop turns off randomly down without any warning.
2. Power LED and Toshiba laptop battery charging LED blinks when you start to wiggle the power cord or AC adapter Toshiba points to the back or your laptop.
3. The battery is charging.
4. When you plug an adapter, the laptop seems to be dead and there is no LED activity at all (DC-IN card system is broken).

To solve the problem, you should take your laptop apart, remove the system board resoleder or replace the DC-IN. Toshiba Satellite A70/A75 disassembly guides will help you remove the system board. Look closer at the power jack on the system board with a magnifying glass. In most cases, you get the power problem due to a bad connection between the DC and the system board, you'll see a crack between the DC jack and the system board.

Here is an example of the power jack for Toshiba Satellite A75. The crack occurs between the pin DC Jack and the system board.

Toshiba Satellite A75 DC IN

Satellite A75 DC Jack resolder on the system board

In some cases, the connection is good, but the DC jack is bad itself. You can find a new DC jack for Toshiba Satellite A75 and Toshiba Satellite A70/A75 laptops here. Look A75 A75 DC or DC jack.

How to resolder laptop power jack you.

UPDATE:

Sometimes, after replacing the plug, you can see that the card system does not receive power at all. The Toshiba PA3465U-1BRS battery is not charging and the power light does not illuminate when you plug the AC adapter PA3468U-1ACA. So, here is a possible explanation.
In a positive connection between the pins and the motherboard breaks (cracks), the power plug is loose. You can feel it when you plug the power adapter toshiba sheet. A power jack can damage which faded into the hole in the card system. Take a look at the picture.

Laptop Power Jack

As you can see, the positive pin goes through the hole in the system board and you solder it on top. Right? What if the trace between the top side and bottom side is broken somewhere in the hole? I saw him a few times before. In this case, everything looks nice and clean on the upper side. When you plug the AC adapter PA3469U-1ACA, you get normal voltage readings between "+" and "-" pins on the upper side, but power does not go to the motherboard at all, because it there was no connection between the upper and lower. Test with a multimeter if there is a link between the top and bottom.
If the trace inside the hole is broken you can always remedy. You can run a wire to connect the top and bottom sides. Be careful not to short something on the shelf.

Updated:

Here is another solution to solve the problem of taking power, he shows how to relocate the power jack outside the basic laptop. Check.