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System-board switches

The following illustration shows the switches on the system board.

DIMM LEDs

1 SW3

2 SW4 (Boot block/Clear CMOS)

The following table describes the function of each switch on the system board.

Table 2. System board switches

Switch number Description

1 Boot block:

v When this switch is on 1, this is normal mode.

v When this switch is toggled to On, this enables the

system to recover if the BIOS code becomes damaged.

See “Recovering from a BIOS update failure” on page 203

for more information.

2 Clear CMOS:

v When this switch is on 2, this keeps the CMOS data.

This is normal mode.

v When this switch is toggled to On, this clears the CMOS

data, which clears the power-on password and

administrator password.

14 ThinkServer TD100 and TD100x: Hardware Maintenance Manual

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Lenovo TD100 Bedienungsanleitung Seite 32