Record number:       H163793
   Device:              D/T6561
   Model:               M
   Hit count:           UHC00000
   Success count:       USC0000
   Publication code:    PC50
   Tip key:
   Date created:        O98/05/28
   Date last altered:   A98/05/28
   Owning B.U.:         USA

 Abstract:  INTERMITTENT "NO POWER" CONDITION IN 4X4 DESKTOP SYSTEMS


 SYMPTOM:
 IBM PC300GL and IBM PC300PL systems may exhibit an inter-
 mittent "no power" condition in systems manufactured with a
 Western Digital 2.5GB or 4.2GB hard file and a Delta power
 supply.

 PROBLEM ISOLATION AIDS:
 The intermittent failure to power on may be seen by the user
 as a complete lack of power to the system unit. The power-on
 LED does not turn on, nor does the hardfile LED. When the
 system enters into this condition, the AC line cord must be
 removed, then reinserted to the AC receptacle to reattempt a
 power-on cycle.

 The failure symptom may become a solid failure if a second
 Western Digital 2.5GB or 4.2GB hardfile is added to the
 system configuration.

 This tip applies to the following Series and Machine Types:

 IBM PC300GL Series 6561 Systems
 IBM PC300PL Series 6562 Systems
 IBM PC300PL Series 6862 Systems

 The failure symptom is not likely to occur in any of the
 systems listed above if:

   a) The system contains an ISA adapter of any type.
   b) The system contains a PCI adapter of any type.
   c) The system has PCI Ethernet capability integrated into
      the system board.

 Tower versions of the PC300GL (6591) and PC300PL (6592/6892)
 are not affected.

 FIX:
 In systems that meet the above criteria, replace the power
 supply with the appropriate FRU part number:

 IBM PC300GL Series 6561 systems  P/N01K9846
 IBM PC300PL Series 6562 systems  P/N12J5991
 IBM PC300PL Series 6862 systems  P/N01K9846

 NOTE: Power supplies manufactured by Astec and API under these
 part numbers DO NOT exhibit this "no power" condition when used
 with Western Digital hardfiles.

 As a temporary method of recovering from the "no power"
 condition, the user can remove the AC line cord and re-plug it
 to re-attempt the power-on cycle. Once the system powers on,
 it will function normally.

 SAS KEYWORDS:
    PSY2PWR            CDT                CDTPWR             D/T6561
    D/T6562            D/T6862            DEAD SYSTEM        6561
    6562               6862               UNCLASSIFIED