Restored Dell Optiplex 990-SFF WA1-0430 Desktop PC with Intel Core i7-2600 Processor, 16GB Memory, 2TB Hard Drive and Windows 10 Pro (Monitor Not Included) (Refurbished) - Walmart.com
Optiplex 990 may freeze with a blinking cursor during startup | Dell US
OptiPlex 990 Small Form Factor (SFF) Removal Guide for the System Cover, Front Bezel, Optical Drive, Drive Cage and Hard Drive | Dell US
OptiPlex 990 Small Form Factor (SFF) Removal Guide for the Heatsink, Intrusion Switch, IO Panel, Internal Speaker and Power Supply | Dell US
Amazon.com: Dell OptiPlex 990 SFF Desktop PC Intel Core i5-2400 3.1GHz /4G/250G/Win 7 Pro : Electronics
OptiPlex 990 Ultra Small Form Factor (USFF) Removal Guide for the Coin Cell Battery, Front IO Panel, Control Panel, Intrusion Switch and Power Supply | Dell US