Troubleshooting Charts - IBM Netfinity 4500R User Reference Manual

Boot block
jumper (J37)

Troubleshooting charts

T r o u b l e s h o o t i n g
To recover the BIOS:
1. Turn off the server and peripheral devices and disconnect all external cables and
power cords; then, remove the cover.
2. Locate the boot-block jumper block (J37) on the system board.
3. Place a jumper on pins 2 and 3 to enable BIOS recovery mode.
4. Insert the BIOS flash diskette into the diskette drive.
5. Restart the server.
The Recovery Boot screen will appear. A progress report, Loading data from
diskette %, is displayed. When programming is underway, a further progress
xx
report, Programming block
completes, the following message is displayed: Recovery complete, remove the
diskette and return boot block switch to the off position before
rebooting.
6. Remove the flash diskette from the diskette drive.
7. Turn the server off.
8. Remove the jumper from the boot-block jumper block or move it to pins 1 and 2 to
return to normal startup mode.
9. Restart the server. The system should start up normally.
You can use the troubleshooting charts in this section to find solutions to problems
that have definite symptoms.
System board
switch block (SW1)
, is displayed. When the procedure
n of 7 yy%
Troubleshooting
Chapter 7. Solving problems
139