OptiPlex XE4 タワー | Dell 日本,Amazon.com: Dell Optiplex 4th Generation Desktop Computer | Quad Core Intel i5 (3.2) | 16GB DDR3 RAM | 1TB SSD Solid State | Windows 10 Professional | ,Desktop not starting properly. This cylinder flashes on the tower. What does it mean? : r/Dell,Dell Optiplex 990 Desktop PC- 2nd Gen 3.1GHz Intel Quad Core i5, 8GB-24GB RAM, Hard Drive or Solid State Drive, Win 10 PRO,Dell Optiplex 5040 SFF Computer Core i7 6th gen 3.2GHz 16GB RAM 512 SSD DVD Wi-Fi NO Operating System