Bit of an odd one.
Computer refuses to restart unless you leave it for a while - try a start in approx 3 hours and it's fine.
During a restart, the power comes on but it does not reach the ACER spalsh screen. It just sits there powered up with a black screen. I've also noticed when it does actually start after the 3 hour wait I get a single beep. Within a failed restart no beep, just a black screen.
What I've tried
I've searched the ACER download section and found a BIOS update, enter the BIOS set to start into DOS via a USB hit F10 and I run into the won't start issue. When it does restart, it starts to windows and ignores the USB.
I've replaced the CMOS battery - didn't make any difference
I'm thinking I now have some hardware failure - what do you think?
System
Acer Aspire XC600 Desktop, Intel Core i5-3300 3GHz, 6GB RAM, 1TB HDD, DVDRW, Intel HD, WLAN, Wired Keyboard & Mouse, Windows 8 64bit