I have a Dell PowerEdge 860. Got an 2008 R2 running on it. Here is the scenario I'm currently in: I can boot it up and work as usuall. But when I restart it, it just shuts down, doesn't reboot, and it won't boot up again. Then it stays in this "mode", On/off button blinking green(standby mode?) and System Indicator LED blinking amber. If I try to press the On/Off button on the frontpanel it won't boot. It's like you can hear the fan from the PSU running but nothing else is trying to boot. If I unplug the powercable and then put it back in again it's the same, the extremley noisy fans won't start and it's just sitting there. If I let it "rest" for like 1 to 24 hours while the powercable is unplugged and I plug it in again, it boots directly, without me having to push the On/Off button. What I have tried: Run diagnostics(not the one in POST phase) and everything is fine Booting without any cables except the powercable Boot without memory installed Boot without the raidcable plugged in Cleared NVRAM Reseated all the components and cables Googling like a freak for any possible solution Tried Dell Support but I don't have any warranty left so they can't help me unless i pay some ridiculous amount of money I suppos Do anyone have some experience with the same issue? Do I need to replace something or is there any other way to determine the problem? Any help will be greatly appreciated.