Laptop power problem
My g/f has an IMB thinkpad 770. I replaced the end of the power supply cord that plugs into the laptop. The only end I could find that would fit was two piece that allows you to change polarity. The plug came apart the other day and she plugged it in with reverse polarity. The power supply and laptop have polarity indicators on them. I checked the power supply voltage (16.37VDC) and polarity (center positive). The laptop will power up on the battery but if the cord is plugged in with proper polarity, the laptop shuts down. While shut down, I can reverse polarity for a split second(I know this is not good) and there will be a small spark at the plug. Then the laptop will work again.
Anyone ever experience anything like this?
Good repair shop recommendation?