This is a well maintained and configured machine, working perfectly with no hint of any problem.
Machine was shut down properly at 7.00pm, at 10.00pm it was switched on again and failed to boot.
Failure sequence runs like this... machine is switched on, bios starts up and displays the normal progress bar, which travels across its width to within a centimetre of completion and then sticks. There are then two bios beeps, and the BIOS screen then displays one of two messages: either "Drive 0 not found" and "Drive 1 not found", or "Floppy Disk seek failure", sometimes both. On occasions the machine has actually booted into the OS (Win7 Ult), but the last time it did boot it produced a GPF too quickly to read and rebooted. The boot SATA drive is loaded into a HDD carrier, so that the machine can be quickly recovered if there should be a HDD issue. HA!! not much good if the damn thing won't boot! When the first HDD was replaced by the standby or second HDD the same sequence of faults presented themselves. Both HDD's are relatively new, and well maintained, and have displayed no signs of incipient failure. This is a real bummer as the machine is vital to our business, viz all the fall back options, and to have it fail at a point at which we can do nothing is very frustrating. Any guidance would be useful, many thanks in advance. Hippus