PC booting to BIOS after turning off at wall

[lotharhex]

Motherboard is an Asus M5 A97 LE2.0

If I shut my PC down and then turn it off at the wall, it will boot to BIOS next time I turn it on.

Thought it might be that the motherboard battery was dead but still doing it after replacement. It doesn't do this when I shut it down, but keep the power on at the wall. The PC works perfectly fine after I exit the BIOS screen.
Any thoughts?

 

[cin19]

1) Make sure the boot order is right.
2) Double check the boot device is connected into the 1st SATA port

 

[lotharhex]

Turned out I had knocked the CMOS cap off the jumper. Replaced and sorted.