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

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