Product Documentation
Abstract
System board diagrams for the IBM System x3400.
Content
 | System-board optional-device connectors |
| System-board internal connectors |
| System-board external connectors |
| System-board LEDs |
| System-board switches and jumpers |
| Related information (HMM) |
The following illustration shows the system-board connectors for user-installable optional devices:
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The following illustration shows the internal connectors on the system board:
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The following illustration shows the external input/output (I/O) connectors on the system board:
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The following illustration shows the light-emitting diodes (LEDs) on the system board:
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The following illustration shows the switches and jumpers on the system board:
Note: Any jumper blocks on the system board that are not shown in the illustration are reserved. The following table describes the function of each jumper block:
| Switch number | Settings |
|---|---|
| 1 | Boot block: When this switch is on 1, this is normal mode. 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" in the HMM for more information. |
| 2 | Clear CMOS: When this switch is on 2, this keeps the CMOS data. This is normal mode. When this switch is toggled to On, this clears the CMOS data, which clears the power-on password and administrator password. |
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 | Problem Determination and Service Guide - IBM System x3400 |
Document Location
Worldwide
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Document Information
Modified date:
24 January 2019
UID
ibm1MIGR-5070001