Dell OptiPlex 3090 Ultra Service Manual page 87
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Also See for OptiPlex 3090 Ultra:
- Setup and specifications (23 pages) ,
- Setup and specifications manual (89 pages)
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4. Press and hold the power button while the device is unplugged to ground the system board.
NOTE:
To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an
unpainted metal surface at the same time as touching a connector on the back of the computer.
Stands
87
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