press "Delete" when the system starts up to enter BIOS.(The mathod might be various depends on brand of your system, your user manual may help you) Then find a option such as "IDE Detection" or the like. ! n( H. c2 `# L% f3 E5 N& d8 TYou know, I mean, you should let the BIOS to recognize the newly installed HDD.! q- R5 q9 V" t$ H
PS: against your description, you mayy MEMORY may meet difficulty. unplug them and reinstall after proper cleaning.