Lenovo and 1040, Hardware Maintenance Manual

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Figure 9. Jumper blocks on the system board
Table 5. Jumper block settings
Jumper
block Pin position Description
Pins 1-2 These pins should have a jumper in place for normal system operation (default).
1
J8B5:
ME Force
Update
Pins 2-3 ME force update model.
Pins 1-2 BMC Firmware Force Update Mode – Disabled (default)
2
J8C1:
BMC force
update
Pins 2-3
BMC Firmware Force Update Mode – Enabled
Pins 1-2 These pins should have a jumper in place for normal system operation (default).
3
J1A1:
BIOS
recovery
Pins 2-3
The main system BIOS will not boot with these pins jumpered. The system will boot
from a bootable recovery media with a recovery BIOS image.
Pins 1-2
These pins should have a jumper in place for normal system operation (default).
4
J2D2:
CMOS clear
Pins 2-3 If these pins are jumpered, the CMOS settings will be cleared on the next reset.
These pins should not be jumpered for normal operation.
Pins 1-2 These pins should have a jumper in place for normal system operation (default).
5
J2D1:
Password
clear
Pins 2-3 If these pins are jumpered, administrator and user passwords will be cleared on the
next reset. These pins should not be jumpered for normal operation.
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ThinkServer TD230 Hardware Maintenance Manual