My wife has an IBM ThinkPad T23 notebook computer. She's on her fourth
power supply because they keep breaking at the power plug. Since the
plugs are molded they cannot be repaired. I replaced the plug with a
Radio Shack 2.5mm by 5.5mm plug, but it is not a good connector. It will
disconnect with the slightest movement.

Since a new IBM power adapter works fine, I don't believe that there is
a cold solder joint on the motherboard, although there could be. If I
knew how to get into the case, I would re-solder the jack, but I could
end up trashing the computer.

Does anyone know where I can get a QUALITY solder-on power plug for an
IBM ThinkPad? The center wire in the cable is about 20AWG diameter,
which means the flimsy Radio Shack crap is not a good fit.

It would be great to find a source for pigtails with molded plugs such
that all I have to do is to put an intermediate connector on the cable.