acer power problem

The power jack on these laptops is only held in place by the solder joints, and it is typical for it to come loose from the motherboard from plugging and unplugging the power cord, or if the cord is jerked by tripping over it, etc. The only way to repair this is to completely disassemble the laptop, remove the motherboard, and replace the jack. It's not a repair for the faint of heart, and you should have very good desoldering and soldering skills. If you attempt to do it yourself, be sure to order a new power jack before you begin disassembly. The old one is most likely damaged either from being jarred loose and/or from overheating due to the fractured solder joints.