Apple g4 Laptop User Manual


 
PowerBook G4 (1GHz/867MHz) Logic Board - 14
15. Check that the heat exchanger has three rectangular thermal interface pads in place.
If the pads are missing or damaged, replace the heat exchanger.
16. Use a razor blade or black stick to gently scrape away any residual thermal transfer
material on the heat exchanger on the surface that mates with the microprocessor.