I have a Dell Inspiron 9100. Mine kept on shutting down randomly and eventually got worse. I got a laptop technician out and at first he thought it was overheating but it turned out to be the AC plug going into the back. Every time it moved around the laptop turns off. This implied that it was something to do with the motherboard. I only use this as a spare laptop now, but want to have a hand at fixing it myself. What would you suggest? Is there any kind of botch job I could try before buying a whole new motherboard?
It’s possible that the power jack (the socket where you plug the adapter) is loose or damaged. When you move the AC plug inside the power jack it shorts the motherboard and because of that the laptop shuts down.
It’s necessary to disassemble the laptop, remove the motherboard and take a closer look at the power jack. If it’s broken or loose you may fix the problem without replacing the whole motherboard.
1. Disassemble the laptop. You’ll find instructions in the official service manual.
2. Remove the motherboard and take a closer look at the power jack.
3. If the power jack is loose or broken, you’ll have to resolder or replace the jack.
4. Find a new power jack here and replace it.
Before you take it apart, I would suggest testing the laptop with another working power adapter. Will it shut down with another adapter? If not, your problem could be related to the adapter. Apparently, there are damaged wires inside the power cable and you short them moving the cable. It’s possible the laptop shuts down because of that.
If you still have the same problem even with another adapter, you can inspect the power jack as suggested above.