_Solutions Tried:_ The dc-dc converter chip 34063 replaced but no effect. The power caps were resoldered and the system came alive for a few minutes, then off. The vga connector pins were resoldered and the system ran for more than half an hour but went off. However now even cool linux does not go beyond console. When the problems start, the system does not start again till quite some time and a lot of fiddling. The cpu is cool.
The dc-dc converter need at least one electrolytic capacitor on o/p side (1.5 volt). Change the capacitor, even if it looks ok. Similarly change capacitor on 5 volt side also. This should solve your problem.
Warm Regards,
Mukund Deshmukh, Director, Beta Computronics Pvt Ltd, 10/1 IT Park, Parsodi, Near VRCE Exchange, Nagpur -440022 Cell 9422113746