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Thread ID: 111481	2010-07-29 02:58:00	Strange problems restarting PC after power cuts	Chikara (5139)	Press F1

Post ID	Timestamp	Content	User
1123186	2010-07-29 02:58:00	Hi all When my PC is not being used, the power on the PC itself is fully off and shutdown. But I leave the power at the wall on (through a surge protector too). The side to the case is transparent, so I can see a green light of some sort inside which is always on, when the wall power is on, even if PC is shuutdown. (Light looks like it is on the MB, not PSU) If there is a power cut, when the power comes back on, that green light is no longer on, and the PC will not start straight away. Power button or reset buttons all have no effect. However the weird thing is, after a few hours, all by itself, the green light comes back on again and I am then able to start the PC normally. And everything is fine. It has done this on a number of occasions when the power at the wall is off. Why does it do this, and can I change it? First time it happened I thought a faulty MB or PSU, but the fact it does this same behaviour every time - but only after mains power is off - and the fact everything works fine when starting again, makes me suspect it's something else. AT first I thought maybe a safety trip on the surge protector, but it's not that. Is there some kind of safety override that keeps it shut down for a period of time after it notices a loss of power? Is there any strange hardware or software setting somewhere that controls this? I can't see anything in the BIOS than might control this. MB is Asus P7P55D PRO and I have the latest BIOS. PSU is Corsair HX750. CPU i7 860 with 6GB RAM. Win 7 64 bit Thanks!	Chikara (5139)
1123187	2010-07-29 03:10:00	On most ASUS mobos, the green LED on the mobo will stay on (if power is still turned on). It's telling you, that power is still going to the mobo (in case you decide to remove something, in which case you should turn it off at the wall) It may or may not depend what the power settings in the BIOS are set to	Speedy Gonzales (78)
1123188	2010-07-29 03:22:00	I have the exact same mobo...very odd issue. I would think it's at the PSU end rather than the motherboard maybe? Not too sure though, odd one.	wratterus (105)
1123189	2010-07-29 03:29:00	Yeah, it's very odd. When the mains power is back, there is no green LED. I just leave it, don;t touch a thing, and then a few hours later the green led is back, and everything starts and boots perfectly. Weird and annoying problem! I have already looked through the BIOS settings but based on Speedy's reply I'll have another check in case I missed something. Perhaps there is some kind of safety thing built into the PSU	Chikara (5139)
1123190	2010-07-29 03:37:00	Yeah, it's very odd. When the mains power is back, there is no green LED. I just leave it, don;t touch a thing, and then a few hours later the green led is back, and everything starts and boots perfectly. Weird and annoying problem! I have already looked through the BIOS settings but based on Speedy's reply I'll have another check in case I missed something. Perhaps there is some kind of safety thing built into the PSU if there is no green led on the back of the case, unplug it the power cable from the back of the case. leave it for a little bit(minute or so) then plug it in and turn the pc on. i've had to do this on my pc at home	GameJunkie (72)
1123191	2010-07-29 03:44:00	I would go through here vip.asus.com See if anyone else has had the same prob	Speedy Gonzales (78)
1123192	2010-07-30 01:07:00	Take note if this happens again if the power supply starts when you press the power button. if it doesn't immediately take it out and try it on another computer that you know works well. The PSU only has to be plugged into the motherboard 20+4 pin connector and the wall, you dont need to properly install it in the case. If it starts up on this computer its obvious that it is a motherboard problem on the i7 machine, if it doesn't its obvious that its a power supply issue. Either way your going to be RMA'ing one part or another. Thanks, -Joe	PCT Joe (15018)
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