NEC MH4500 manual Moving System Board Jumpers, System Board Jumper J6J1 Summary, 10, Normal

System Board Jumper J6J1 Summary

Function	Pins (default in bold)	What it Does at System Reset
CMOS Clear	1-2, Protect CMOS	Preserves contents of NVRAM.
	2-3, Clear CMOS	Replaces contents of NVRAM
		with manufacturing default
		settings.
Password Clear	5-6, Protect	Maintains current system
	6-7, Clear	password.
		Clears current system
		password.
Recovery Boot	9-10, Normal	System attempts to boot using
		BIOS stored in flash ROM
	10-11, Recovery	memory.
		BIOS attempts recovery boot,
		loading BIOS code from diskette
		into the flash device. Typically
		used when BIOS code is
		corrupted.

!CAUTION

Leave the Recovery Boot jumper at the factory default setting. This jumper should only be set by technically qualified personnel.

Moving System Board Jumpers

!CAUTION

Before doing the following procedures, make sure your system is powered off and the two AC power cords are unplugged from the back of the chassis. Failure to disconnect power before moving the jumpers can result in personal injury and equipment damage.

Observe static precautions. Use an antistatic wrist strap.

Use this general procedure as an aid for configuring system board jumpers. See the following paragraphs for details of setting the jumpers.

1.Power off the system, disconnect any peripherals, unplug the system power cords from the system and power source, and remove the access cover (see Chapter 4, “Upgrading Your System,” for access cover removal).

Configuring Your System 3-23