IBM 8668 Hardware Maintenance Manual - Page 26

Identifying problems using status LEDs, Remove the flash diskette from the diskette drive.

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The following illustration shows the location of the flash boot block recovery jumper on the system board. Pin 1 Pin 2 Pin 3 System board switch block (SW1) Flash boot block recovery jumper (J16) 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 flash boot block recovery jumper block (J16) on the system board. 3. Move the jumper to pins 1 and 2 to enable BIOS recovery mode. 4. Insert the BIOS flash diskette into the diskette drive. 5. Restart the server. The Recovery Boot screen appears. A progress report, Loading data from diskette xx%, is displayed. When programming is underway, a further progress report, Programming block n of 7 yy%, is displayed. When the procedure completes, the message Recovery complete, remove the diskette and return boot block switch to the off position before rebooting is displayed. 6. Remove the flash diskette from the diskette drive. 7. Turn off the server. 8. Move the jumper on the boot-block jumper block to pins 2 and 3 to return to normal startup mode. 9. Restart the server. Identifying problems using status LEDs If the System Error light in the operator information panel on the front of the server is on, one or more LEDs inside the server may be on. Use the Light Path Diagnostics feature to identify the type of error that occurred. See "Diagnostic tools overview" on page 13. 18 Hardware Maintenance Manual: xSeries 232, Type 8668

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The following illustration shows the location of the flash boot block recovery
jumper on the system board.
Flash boot block
recovery jumper
(J16)
System board
switch block
(SW1)
Pin 1
Pin 2
Pin 3
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 flash boot block recovery jumper block (J16) on the system board.
3.
Move the jumper to pins 1 and 2 to enable BIOS recovery mode.
4.
Insert the BIOS flash diskette into the diskette drive.
5.
Restart the server.
The Recovery Boot screen appears. A progress report,
Loading data from
diskette
xx
%, is displayed. When programming is underway, a further
progress report,
Programming block
n of 7 yy%
, is displayed. When the
procedure completes, the message
Recovery complete, remove the diskette
and return boot block switch to the off position before rebooting
is
displayed.
6.
Remove the flash diskette from the diskette drive.
7.
Turn off the server.
8.
Move the jumper on the boot-block jumper block to pins 2 and 3 to return to
normal startup mode.
9.
Restart the server.
Identifying problems using status LEDs
If the System Error light in the operator information panel on the front of the
server is on, one or more LEDs inside the server may be on. Use the Light Path
Diagnostics feature to identify the type of error that occurred. See “Diagnostic tools
overview” on page 13.
18
Hardware Maintenance Manual: xSeries 232, Type 8668