Review on 🔌 S-Union 240W Power Supply Unit Replacement for Dell OptiPlex 390 790 960 990 3010 9010 SFF H240AS-00 H240AS-01 H240ES-00 D240ES-00 AC240AS-00 AC240ES-00 L240AS-00 PH3C2 by Douglas Cochrane

My Dell Optiplex 790 Small Form Factor PSU (which I bought refurbished) sometimes fails and I've been able to replace it. This was my third time. I noticed that the last two I was told were upgraded or refurbished or something and lasted about a year so I went to this one which didn't say so and was only marginally more expensive. So far so good, everything works, no problems. (But I haven't had it in a year) For anyone who needs to replace it, I would advise you to search YouTube and you will find a good tutorial on how to do it (I haven't, but I've used it 3 times). Much luck. By the way, you know you need it when the computer won't turn on and the power light is blinking amber instead of blue.