 Re: changing the circuit board on a hard drive ???
It doesn't seem that the problem was with the cpu. The cpu is the hardest thing to "break" on a computer. Most cpus "break" within the first few days to few weeks or by constant overheating. Modern cpus have built-in protection, if it goes over a certain temp, it started to throttle down, of the temp still increases, the cpu is completely shuts-down the computer to protect itself from high temp damage, its different from laptop to desktop computers.
The thing that you want is doable but you would need to buy the same model hard drive and flash the bios firmware onto the new hard drive. If you have someone do it, its going to be very expensive. I have never done it or dont know anyone who has done it so there is very few people who know how too. Since hard drive prices in the 500gb range are very cheap.
Even if after you get your data back, I think that computer might be damaged in other locations, like the motherboard.
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