yes this is possible and it is relatively easy get your working computer and take the side cover off, usually one or two screws in the back to remove, slide the cover off and you will see the power supply and the motherboard and various wires going to different things. First you need to make sure the HDD you want to check has the same kind of connector that is being used on the HDD that is in the computer you using,SATA or IDE you will be able to see the difference if they are different you might get lucky and there will be one already in there not being used, if not you will need an adapter to make them compatible make sure all power is disconnected from the computer and let it sit for several minutes to let the caps dissipate then hook your HDD you want to look at and power up everything as you normally would and see if it will power up, let us know what happens..................gettingthere
