Acer Altos G900 manual Jumper Pins Jumper name effect when shorted Block

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Jumper	Pins	Jumper name - effect when shorted
block
JP3	1-8	Reserved.
	9-10	BMC Boot Block Write Enable - Allows the BMC boot
		block to be overwritten when updating the BMC
		firmware.
	11-12	BIOS Boot Block Write Enable - Allows the BIOS boot
		block to be overwritten when updating the BIOS.

Main jumpers

Below table identifies the function of each pin pair on the main jumper blocks (JP4, JP5, and JP6). The FRB3 Timer Disable jumper and the BMC Force Update jumper are special purpose jumpers that you should use only when instructed to do so. When you do need to enable any of these features, use one of the spares from JP4 pins 1 and 2 or JP25 pins 7 and 8.

Jumper	Pin	Jumper name - effect when shorted
block
	1-2	Spare
	3-4	BIOS Recovery - System will attempt to recover the
		BIOS at the next boot.
	5-6	Reserved
JP4
	7-8	Reserved
	9-10	Password Clear - User and administrator passwords
		are cleared at the next boot.
	11-12	CMOS Clear - CMOS settings are cleared at the next
		boot.
JP5	1-2	FRB3 Timer Disable - Disables fault resilient boot timer
		3.
JP6	1-2	BMC Force Update - Lets a system with corrupted BMC
		firmware boot for an update.