I just upgraded my 2007 Mac Mini with a new Crucial M500 240GB SSD. Problem is that the Mini won't recognise the drive when it boots up. To run through everything I've tried: the new drive has been formatted and restored from the old HDD if I put the SSD in an enclosure, the Mini will boot from it no problem I tried putting the old HDD back in, it won't recognise it either... ...which tells me I'm not assembling it properly, but for the life of me I can't see anything wrong. I'm not new to this, I've already upgraded the RAM without issue. Any suggestions as to what I should be looking for? Thanks.