Lightning overload?

Q: My motherboard was destroyed during a lightning overload (lightning struck the house and "hit" the computer) and was eventually replaced with a new one, though the ventilator on the processor remained the same. What are the chances that the ventilator was destroyed as well, because my computer seems to shut down whenever the CPU usage is high. Also, is it possible for a computer to work normally even without the CPU ventilator? My motherboard was destroyed during a lightning overload (lightning struck the house and "hit" the computer) and was eventually replaced with a new one, though the ventilator on the processor remained the same. What are the chances that the ventilator was destroyed as well, because my computer seems to shut down whenever the CPU usage is high. Also, is it possible for a computer to work normally even without the CPU ventilator? EDIT: The CPU fan is spinning allright, yet the shutdowns are still happening. The power supply is working OK, since it was the first thing the repair guy checked. Can anyone think of any other reasons? (computer is virus-checked)

A: Depending on the size of the heatsink, it may be possible for it to work without the fan to a limited degree. Take the side panel off, and see if the CPU fan spins up. It is possible that some components which apparently survived, are actually carrying some incipient damage, or that where components were replaced, inferior ones were used. The finger of suspicion also points towards the power supply, either not replaced as it was "working", or replaced by one inadequate for the power.

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