Shuttle FN45 User Manual page 2

If you've changed your CPU or overclocked your system, the system may fail to boot up,
even with a Clear CMOS jumper physically resetted. The reason is that NVIDIA's new
nForce2 chipset introduces a way to reset a Clear CMOS jumper without removing a
chassis. Please follow the steps listed below:
1. Turn off your computer and unplug the power cable. Reconnect it after 30 seconds;
2. Press <Insert > and then press your computer's start button. Continue holding <Insert>
until the system begins the POST (Power-On Self Test);
3. Immediately press <Del> to enter the BIOS;
4. Select 'Load Optimized Defaults' to return your system to a bootable condition; then
select 'SAVE to CMOS and EXIT';
5. Reboot your system.
Moreover, if your system fails to boot up after you reset the CPU FSB, select "SAVE to
CMOS and EXIT" in the BIOS. After the system restarts, there is on screen a message
warning you not to reset or turn off your computer:
Your system works after the BIOS is updated.
NOTICE
Warning! New setting is updating now
Do not Reset or Shutdown the system