My first guess is that your Hard Drive data is ok.
With the blown MB and ram it probably never even got past the self test routine.
If you have a second drive you can use as a master and set your old drive up as a slave I would try that first just to recover your data. If you have it as a master and access the os it will write data even if just temp files to it.
If your drive is blown it would just be the controller and the data on the platters would still be ok if you had another board to stick in the hard drive.
Thong_Ispector
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