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Dell OptiPlex 990 (Early 2011) User Manual

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Important Information — Dell OptiPlex 790/990
About Warnings
WARNING: A WARNING indicates a potential for property damage, personal injury, or death.
System Board
The Dell OptiPlex 790/ 790 computers are now shipped with a new system board without the following components:
1. Heatsink
2. Power supply thermal sensor (Desktop chassis only)
Heatsink Removal
The following image displays an earlier version of the system board shipped with the heatsink.
Figure 1. System Board of an earlier version of the system board with the heatsink
All system boards shipped with the following BIOS versions or higher will NOT contain the heatsink.
Computer Model BIOS version
OptiPlex 790/990 A11
If the BIOS is downgraded to an earlier version than the version listed above, an error message will be displayed.
`
Regulatory Model: D09M, D05D, D03S, D01U
Regulatory Type: D05D001, D03S001, D01U001
2012 - 04
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Summary of Contents

Page 1 - Heatsink Removal

Important Information — Dell OptiPlex 790/990About WarningsWARNING: A WARNING indicates a potential for property damage, personal injury, or death.Sys

Page 2

Power Supply Thermal Sensor RemovalThe power supply thermal sensor is removed from the desktop chassis only.Figure 2. System Board with the thermal se

Page 3

Devices, Inc. Microsoft®, Windows®, MS-DOS®, Windows Vista®, the Windows Vista start button, and Office Outlook® are either trademarks or registered t

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