IBM-AUSTRIA - PC-HW-Support    30 Aug 1999

NETFINITY 7000: FRONT PANEL DISPLAYS UNREADABLE CHARACTERS

     Record number:       H163143
     Device:              D/T8651
     Model:               M
     Hit count:           UHC00042
     Success count:       USC0000
     Publication code:    PC50
     Tip key:
     Date created:        O98/03/13
     Date last altered:   A98/09/15
     Owning B.U.:         USA

Abstract: NETFINITY 7000: FRONT PANEL DISPLAYS UNREADABLE CHARACTERS

SYMPTOM:

Incorrect or unreadable information is displayed on the Front Panel after replacing the System Planar Board.

PROBLEM ISOLATION AIDS:

All of the following must be true for this TIP to apply:

•  The System is a Netfinity 7000 Type 8651 Model RM0, RH0, TH0, TH0.
•  The Symptoms started to occur immediately AFTER replacing the   System Planar board.
•  Other than the Symptom described above, the System functions normally.

FIX:

Replace the Control Panel Card with FRU P/N 93H6052 using the following procedure:

1.  Power down the Server, then remove the Power Cord.
2.  Loosen the two thumbscrews located at the back of the top cover.
3.  Remove the Top Cover by sliding the cover to the rear , then lift the front , then the rear.
4.  Disconnect the 20 conductor ribbon cable from J7 of the Control Panel Board.
5.  Remove the Two internal screws located at the top rear of  the LED Card Bracket Assembly, then remove the LED Card  Bracket Assembly (Refer to the IBM Netfinity Hardware Maintenance Manual Supplement P/N 06J0791 page 102)
6.  Disconnect the following cables from the Control Panel  Board: - 2 conductor from J5 (to cover switch) - 26  conductor ribbon from J2 (to Power Backplane) - 40 conductor  ribbon cable from J1 (to Planer)
7.  Remove the 4 screws that secure the Control Panel Board to the chassis.
8.  Replace the Control Panel Board using normal parts replacement procedures.
9.  Reverse this procedure to complete the installation.

DETAIL:

The buffers used in the original Control Panel Card may cause the Front Panel to display unreadable / incorrect characters.
This issue has no direct effect on the System's Server functions.

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