Averatec AV3225HS / 3200 Series

This Averatec Av3225HS (3200 Series) came in with the classic wiggle of the ac adapter to get it to charge and power on. The 3200 laptops are very common ones I see and fall under the $65 flat rate.
This one uses a three pin, 2.5mm dc jack that's soldered on an small circuit board separate from the actual motherboard. This is nice because if it burns the circuitry or if you drop it the actual motherboard doesn't get damaged.
The dc jack was replaced and the laptop powers on and charges the battery again.

Gateway MX6440 DC Power Jack Repair

This Gateway MX6000 series came in with no signs of life. The ac adapter tested out fine but no amount of wiggling or positioning of the ac adapter would make it power on.
When it was all taken apart I could see the center pin on the back of the dc jack had completely snapped, unable to give any power to the motherboard.
The gateway MX6000 uses a six pin, 2.5mm dc jack that's soldered onto the motherboard.
After a new dc jack was soldered on the laptop powered up without any problems.

Compaq TC1000 Tablet DC Power Jack Repair

The TC1000 compaq tablet is a small 12.1" lcd that's about four years old.
It came in with the dc jack problem symptoms and you could wiggle the ac adapter plug to make it shut off. The dc jack looked worn and loose.
It uses a five pin, 1.65mm dc jack that's soldered into the motherboard.
Soldering the new jack on fixed the problem and the laptop powers on with no problems.