IBM 866011U - Netfinity 5500 - 8660, Hardware Maintenance Manual

Page: 299 / 402

System Board SCSI LEDs FRU/Action
5 blinks followed by a
pause
(DRAM address error) a. Check cables
b. System Board
c. DASD Backplane
6 blinks followed by a
pause
(Code block checksum
error, flash the ServeRAID
controller.) 1. Run the ServeRAID
Flash program.
2. Check cables
3. System Board
4. DASD Backplane
On (solid) 1. Check jumper J11,
see “System board
jumpers” on
page 257.
2. Check cables
3. System Board
4. DASD Backplane
Undetermined problems
You are here because the diagnostic tests did not identify
the failure, the Devices List is incorrect, or the system is
inoperative.
Notes
1. If you suspect a software mismatch is causing
failures (solid or intermittent), be sure to see
“Resolving configuration conflicts” on page 73.
2. A corrupt CMOS can cause undetermined
problems.
Check the LEDs on all the power supplies, see “Power
supply LED errors” on page 278. If the LEDs indicate the
power supplies are working correctly, return here and do
the following:
1. Power-off the computer.
2. Be sure the system is cabled correctly.
3. Remove or disconnect the following (one at a time)
until you find the failure (power-on the computer and
reconfigure each time).
Ÿ
Any external devices
Ÿ
Surge suppressor device (on the computer)
Ÿ
Modem, printer, mouse, or non-IBM devices
Ÿ
Each adapter
Ÿ
Drives
Ÿ
Memory-Module Kits (Minimum requirement = 1
bank of 64 MB DIMMs)
Netfinity 5500 - Type 8660
291