Originally Posted by
vailr
@ Mickey Padge: the UD5H's dual bios selector switch is located near the edge of the board, opposite side of where the CPU is located.
With power disconnected, slide the switch to select the alternate bios, then do the update flash. I recommend using bios version F15o, because later bioses F15p & F15q have lost use of the F11 alternated boot device key. F15q also has problems with the USB mouse function while in the bios setup.
Note: only F15k and later include the updated Intel RST firmware. Version F15t is also not recommended.