240W SFF Small Chassis Power Supply Replacement for 390 790 990 SFF Desktop, Compatible Part L240AS-00 H240AS-00 3WN11, Compact Small Form Factor PSU Stable Internal Power Supply Unit for Office Deskt

This 240W SFF compact desktop power supply serves as a high-quality replacement power unit tailored for 390, 790 and 990 SFF small chassis workstations. It is fully interchangeable with original part codes L240AS-00, H240AS-00 and 3WN11, perfectly solving issues caused by aging or damaged original power supplies such as failing to boot, random shutdowns and abnormal hardware operation.

Built with premium internal electronic components, this switching power supply delivers consistent and stable power output to support regular office work, document editing, web browsing and multimedia playback. It integrates comprehensive protective functions including overvoltage, overcurrent, overload, short-circuit and overheat protection, effectively shielding the motherboard, hard drives and other internal hardware from power surges and voltage instability.

Adopting the standard small form factor dimension, it fits precisely into the original chassis space. The wiring layout and connector definitions are consistent with the original PSU, realizing plug-and-play installation without extra modification. The built-in cooling fan ensures efficient heat dissipation during long-time continuous operation.

It is an ideal maintenance spare part for enterprise office equipment, computer repair workshops and home office PCs. Quickly replace your faulty power supply to revive your SFF desktop and avoid expensive whole machine replacement.