I changed from AHCI to IDE in the BIOS as per this post because of the SSD hanging issue. PC rebooted and said it couldn’t find the operating system and was going to restart. PC powered off and I haven’t been able to get it back up. All that happens when I press the power button is the HDD lamp stutters (3 flashes repeating). I’ve reset the BIOS but still nothing happens. I’ve put a different IDE HDD in without any luck. PC completely dead except for the flashing HDD lamp. Anybody got any clues to how I can get the BIOS back up??