Miscellaneous Symptoms Micro Channel

Symptom/Error:	FRU/Action.
Drive letters changed unexpectedly	1. This is a normal condition.
after installing OS/2 or a SCSI adapter.	Use the configuration program
	to change the drive letters back
	to the desired settings.
Intermittent failures.	1. Power Supply
(See Undetermined Problems before	2. Power Supply Fans
replacing FRUs)	3. Any Device or Adapter
Diskette drive LED stays on.	1. Diskette Drive
Hard Disk LED stays on.	1. Hard Disk Drive
	2. System Board
Hard Disk LED not working, but	1. Control/Speaker Assembly
computer is completely functional.	2. System Board
Reference Diskette does not start.	1. Diskette Drive
	2. System Board
	3. Diskette Drive Cable
	4. Reference Diskette
Read / write errors on a 2.88MB diskette	1. Use View Configuration to
drive. (If the drive was just installed,	determine if the diskette drive
either the computer has down level IML	is listed as a 2.88MB. If not,
code loaded or that model does not support	the latest level Reference
a 2.88MB drive.)	Diskette code must be loaded
	onto the system Partition.
Image Adapter/A Memory Test failure	1. Memory Module (shown in graphic)
indicated by graphic representation
of adapter.
IML image has been updated and the	1. Verify an operating system
Diskette and F1 error prompt	has been loaded onto the
appears on the screen.	default hard disk.
IML image has been updated, the	1. Verify an operating system
Diskette icon appears on the display,	has been loaded onto the
and a I99903XX appears on the	default hard disk.
information panel (95).
Internal Data/Fax modem does not	1. Check that setup data
communicate with a remote modem or fax.	defined by communication
NOTE: Make sure the serial device	software is suitable for
power option is set to on in the	communication.
Set Features program.	2. Internal Data/Fax Modem
	3. System Board
Internal Data/Fax modem does not	1. Check in power configuration
respond to software, and diagnostics	and verify the modem is turned on.
does not find the problem.
Program load error during remote IPL	1. Network Adapter
from the file server.
Program loads from the hard disk or a	1. Diskette Drive
non system disk or disk error (with	2. System Board
the Reference Diskette in drive A).	3. Power Supply
	4. Reference Diskette
No colors on a color display.	1. Display (any type)
(Connect display to the VGA port and	2. VGA terminator
run the Enhanced VGA test to see if
the display is the problem)
Screen colors change.	1. Display (any type)
	2. Display Adapter
	3. System Board
One or more keys do not work and the	1. Keyboard
computer is otherwise functional.	2. Keyboard Cable
(Check keyboard)	3. System Board
Power Supply appears to fail at	1. Motor Start Jumper
power-on, but if you disconnect optional	(Remove the motor start jumper
hard disks, the problem goes away	from one or more option drives.)
(load problem).
See 'Setting the Motor-Start-Jumper'.
Power-on indicator does not come on,	1. Control/Speaker Assembly
fan runs, and computer is functional.
Power-on indicator does not come on,	1. System Board
fan runs, and computer is not functional.	2. Power Supply
Power-on indicator does not come on,	1. Power Supply
fan runs, and computer is not functional.	2. System Board
(See Undetermined Problems
before replacing FRUs)
Operating system does not work, or the	1. Default Hard Disk Drive
system starts up in BASIC.
(See 'IML and IPL Errors' before
replacing FRUs)
Real Time Clock loses time.	1. Default Hard Disk Drive
(This is not always a hardware failure.
See 'Real-Time Clock Problems')
Computer cannot be powered-off.	1. Control/Speaker Assembly
	2. System Board
	3. Power Supply