acquired a Dell GX 150 which may or may not have been working. The problem began as an unrecognizable hard drive, turns out someone removed the drive and didn't tell me. hooked up a new hard drive, system lit up, might have beeped (I don't recall now), but no video on a monitor that did not come with the Dell. Checked this monitor on another system, monitor broken. With new monitor, powered problem system back up, but just blinking yellow light. If I let it sit for a couple days (hours won't cut it) I can get the system to power up briefly (less than a minute) and rear LED indicator lights come on, then they go out and the power light goes blinking yellow. There's never enough time for me to actually see anything on the monitor, nor do I think that it gets far enough to give me any beep codes. When it does this, the four LED indicator lights on the back of the system stay off. If I let it rest for several days and then try to power up, the 4 lights might come on, look busy for a moment, then everything dies. CPU fan spins, yellow light on MOBO is on, but no spin in hard drive that I can hear, no beep codes, no rear LED indicator lights on. PSU fan does NOT spin. If I didn't know better I'd swear it gets locked in hibernate mode or something. To that end I pulled the battery to reset the bios, no luck. I have to hold the power button in for several seconds to get it to power down. Sometimes this does not work. Disconnected everything but video card and RAM and still nothing. I have no additional power supply to check if this is the problem but all the readings I've done with my voltmeter appear to be OK (accuracy is a question, I have a variable meter with a needle) but everything that should have power seems to be getting power. Should my psu fan be spinning in this "suspended like" mode? If yes, is this a sign that the PSU's bad? I found a post here to try resetting the power supply. I'm going to try it tonight. Any other suggestions?