[Albert Lionheart]

Why don't I listen to my own advice?
Popped in to see a client who is also a great friend for a coffee. Whilst rabbiting about all sorts of things he said he wanted to upgrade the memory and also his hard drive - no worries sez I and has the back off the system to check what the RAM is before you can say 'don't be a pillock'.
Stick the RAM stick back in again and it won't boot because it can't find the boot drive.
Off with the back again and find I have pushed the power supply for the boot drive to one side (would not have happened with a molex - I hate these SATA connections!) - pop it back on again but still no go.
Stick a new SATA signal cable on and it works.
Just not my day today - unable to work this morning as a thunderstorm caused a power cut (outage to you across the pond).
Motto - listen to that little voice....