Got a computer, diagnosed the problem, believed it to be a motherboard, sourced a new motherboard, picked it up from Galway... took new motherboard home, began switching it with faulty motherboard... disconnected cables, cleaned heatsink... but wait... the plate that the heat sink beneath the motherboard does not come off...
|"A CPU retention plate can throw a curveball at your install." Yep|
I like point 24 on this page... http://www.computershopper.com/feature/75-pc-building-tips-cpu-heat-sink-installation where it says "Brace yourself: A CPU retention plate mounts underneath the motherboard.
24. A CPU retention plate can throw a curveball at your install."
Doesn't come off! Ahhhh.... So much progress so quickly only to be shot in the foot by this.... you win today plate beneath the motherboard... but tomorrow your ass is mine!