Section 2 Display Isolation; Section 2- Display Isolation; Section 3 Electronic Module Isolation - IBM 6580 Product Support Manual

SECTION 2 OISPLAY ISOLATION
Did the customer have a service request number leading to
this area?
YES, loop on the display MOls and see Section 13,
"Service Request Numbers."
NO, follow the procedure below:
1. Loop on BAT (RNA Test G)
• Failure - Use the BAT error code with MAPs to
determine the cause, and see Section 14, "BAT
Failures."
• No Failure - Continue with this procedure.
2. Loop on BAT (RNA Test G) while flexing (moving)
the following:
The display cable and display cable connector 2
The internal distribution cable and internal
distribution cable connectors 2, 01, and P2
• Failure - Check the cable and connector.
• No Failure - Continue with this procedure.
3. Loop on Display Path Test (RNA Test
Q)
• Failure - A failure to read or write to the display
buffer memory is indicated. Reseat the system
and display adapter cards.
• No Failure - Continue with this procedure.
4. Loop on display MOls
• Failure - Print the trace table, and perform the
fix as instructed.
• No Failure - Continue with this procedure.
Section 2 Display.
INTERMITTENT PROBLEM DIAGNOSTIC APPROACH - Section 3 Electronic Module
-109-
5. Loop on keyboard MOls while flexing (moving) the
SECTION 3 ELECTRONIC MODULE ISOLATION
cables referenced in Step 2.
• Failure - Print the trace table, and check the
cable and connector.
• No Failure - Check all ground wires for a good
ground.
NOTE: If you suspect another area, see that section. If
not, see Section 9.
Did the customer have a service request number leading to
this area?
YES, loop on the system MOls and see Section 13,
"Service Request Numbers."
NO, follow the procedure below:
1. Loop on BAT (RNA Test G)
• Failure - Use the 'BAT error code with MAPs to
determine the cause, and see Section 14, "BAT
Failures."
• No Failure - Continue with this procedure.
2. Loop on BAT (RNA Test G) while flexing (moving)
all Electronics Module cables and connectors.
• Failure - Check the cable and connector,
No Failure - Continue with this procedure.
3. Loop on Base RAM TEST (RNA Test R)
• Failure - A failure to read or write to main
memory is indicated. Reseat the system and
memory cards.
No Failure - Continue with this procedure.
4. Loop on ROS CRC Test (RNA Test P)
• Failure - A CRC error is sensed. Reseat the system
card.
• No Failure - Continue with this procedure.