Asus B75M-A - Manual (Page 33)

ASUS B75M-A 1-21
Except when clearing the RTC RAM, never remove the cap on CLRTC jumper default
position. Removing the cap will cause system boot failure!
• If the steps above do not help, remove the onboard battery and move the jumper
again to clear the CMOS RTC RAM data. After clearing the CMOS, reinstall the
battery.
• You do not need to clear the RTC when the system hangs due to overclocking. For
system failure due to overclocking, use the CPU Parameter Recall (C.P.R.) feature.
Shut down and reboot the system, then the BIOS automatically resets parameter
settings to default values.
2. P/S2 device wake-up (PS_USBPW34)
This jumper allows you to enable or disable the P/S 2 device wake-up feature. When
you set this jumper to pins 2-3 (+5VSB), you can wake up the computer by pressing a
key on the P/S 2 keyboard or by clicking on the P/S 2 mouse. This feature requires an
ATX power supply that can supply at least 1A on the +5VSB lead, and a corresponding
setting in the BIOS.
B75M-A
B75M-A Keyboard Power Setting
PS2_USBPW34
2 1 2 3
+5V
(Default)
+5VSB