iBook Powersupply - Hot then stops charging

Wondered if anyone out there had come across this problem.

I have the last gen G4 14" iBook and have noticed in the last year or so, the power supply gets very very hot when charging, then stops charging. The only way to get it to start charging again is to unplug the charger and leave it to cool down.

I'm guessing this isn't normal, but I don't have any other charger I can test it with, so I don't know if it's the batter caysing this, or the charger.

Has anyone else had this problem and if so, what did they do?

Thank you

Have you tried this yet?

I haven't, but I will.

Will let you know how I get on

Thanks