I have a Dell 2200 and had to take it apart to fix the power cord connection. I am a rookie at this but managed to get it back together. My only problem is I could not remember where the mouse pad connection connected to the motherboard. Can anyone tell me how to reconnect my mouse pad?
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Maybe it's the DC Jack that the power cord plugs into. If the jack is loose then you will experience the issue you are having.
Maybe your DC Power Jack which is where the power cord plugs
into the computer is bad. Take an ink pen and push the tip inside the
jack and see if the little pin wiggles, if so the jack is bad. You'll have to
take the laptop apart to fix it. Most times it is soldered onto the
motherboard, so you will have to desolder the old and solder a new one.
If you have a external mouse, or you can borrow, go into device manager to see if the pad is enabled, if okay! try a system restore bringing the computer back in time before this happened, if still no luck the sensor pad maybe defective, the last option a complete recovery of the operational system to factory setting, this will prove if the sensor pad is defective, or wire ribbon might have come loose from the motherboard.
Check your AC adapter for an LED showing it is getting power from the wall. Make sure you have no external devices connected, then try booting with just the AC adapter, next, just the battery. If still nothing, then your motherboard is probably bad.
First check the plug on the end of the adapter with a multi-meter, The voltage on the plug should be slightly higher than the voltage that is printed on the label on the bottom of the mains adapter. Also wriggle the wires on the plug to see if the voltage fluctuates, if so it could be a loose/broken wire on the plug.
When you jiggle the plug in the power socket on the laptop and the charge LED flashes and in the right position it charges, this indicates that the power socket is faulty or there is a dry solder joint on the motherboard where this power socket is attached.
To get at the power socket will require dismantling the laptop completely.
When you remove the screws from the bottom of the laptop, take a note where the screws come from as the vary in length.