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Dell OptiPlex 790 System Guide

Quick Links Getting Started with your Dell System System Documentation - User Guides/Manuals Find your Service Tag and Express Service Code Dell Drivers and Downloads Warranty Status and Service ... Read more


Windows 7 64-bit install on Optiplex 790/990 with UEFI Mode

Users may want to install Windows 7 64-bit on an Optiplex 790 or 990 with the Basic Input/Output System (BIOS) Unified Extensible Firmware Interface (UEFI) setting enabled. Here are some important ... Read more


How to Connect Speakers or Headphones to a Dell Computer

External speakers or headphones that are connected to a computer improves the audio quality while enjoying web content, digital music, and other sound sources. Speakers or headphones for computers ... Read more


Keyboard Usage and Troubleshooting Guide

When your Wired USB, Wireless USB or Bluetooth® keyboard is not working as it should, refer to the expanding section below that best matches the issues that you are having and follow the ... Read more


Resolve No Power, No POST, No Boot or No Video issues with your Dell Computer

This article helps determine why it does not power on, display video, or boot to the operating system correctly. This video is a great starting point to help identify which of the following ... Read more


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