IBM B50 manual Keyboard/Mouse Problems

Error Code	Function	Repair Action/Possible Failing FRU
	/Description
28030001	RTC initialization	Refer to action for 28030xxx.
	required - RTC not
	updating, corrected.
28030002	Bad time/date	1. Set the Time and Date
	values	2. Refer to action for 28030xxx if problem persists.
28030003	RTC initialization	Replace the system board (see note 3 on page 2-1).
	required - RTC not
	updating, not
	corrected
28030004	RTC operating	1. Set or Restore the Time and Date
	mode parameters	2. Refer to action for 28030xxx if problem persists.
	changed (ie. data
	format)
28030005	RTC Battery error	1. Replace the battery.
		Note:	Password, Time, and Date needs to be set
		.
		2. Refer to action for 28030xxx if problem persists.
28A00040	Fan failure	Check on the following:
		Ensure fans (CPU fansink connector J26 and
		System fan connector J27) are properly connected
		to the I/O planar.
		Reseat all suspected fan(s) connectors.
		Look for obstructions that may prevent the fans
		from normal operations. (For example, a cable
		caught in the fan preventing it from spinning.)
		Replace any suspected fan(s) that may cause this
		error.
		If after replacing the suspected fan(s) and the
		problem still exists, then replace the system board
		(see note 3 on page 2-1).
28A00050	Power Supply	Replace the power suppply
	Failure
29xxxxxx	Keyboard/Mouse
	problems
29000002	Keyboard/Mouse	Replace system board (see note 3 on page 2-1).
	controller failed
	self-test.
29A00003	Keyboard not	1. Keyboard
	present/detected.	2. Replace system board (see note 3 on page 2-1).
29A00004	Keyboard stuck key	1. Keyboard
	detected.	2. Replace system board (see note 3 on page 2-1).
29B00004	Mouse not	1. Mouse
	present/detected	2. Replace system board (see note 3 on page 2-1).

Chapter 3. Error Code to FRU Index 3-11