Ibook over heating - Airport card effect


Recently my wife's Ibook, 900 MHz, chip Power PC 750 (2.3) is getting really hot after 30 minutes of operation. The area left of the finger pad, under where your left hand is, is extremely hot.

The airport card disconnects the connection and the network is competely lost lost. The system shows no airport card available. After turning off the computer to cool it down for about 1 hour or so then once again the airport card once mork works fine.

Myself and friend who also have Ibooks have never seen this condition.

Any ideas or information on this would be really welcome.