So I just swapped my laptop with my brother for a gaming rig which i built about a year and a half back. Quite excited about gaming on pc again but there is a hardware problem with this computer that I need to solve first. I suspect it is one of the rails on the power supply but don't have any spare PSU's (or cash at the moment) to test out so thought I'd ask here before I decide what I need to do next...
So he said that he was watching a film on the computer with no problems (there has been no problems with this computer since it was first built), he left the computer for a while and it had gone into sleep mode by the time he came back. He went to turn it back on but the power light just flashed on briefly and then off and that was it. If you try and boot the computer up that is what happens, sometimes the HDD light flashes on and off with the power light. If you press the power button again, nothing will happen until you turn the switch off on the back of the PSU and then back on again. However, when you do try and turn it on, the lights come on - on the motherboard and the power and reset buttons on the motherboard stay lit up. Also when you try and turn it on there are 2 red lights that flash on briefly on the ATI 4870 GPU (neither of us can remember if those lights on the GPU normally flash on so thought I'd mention it).
When you do attempt to power up, no fans move at all (all the fans are wired straight to the psu and a fan controller). I tried wiring one of the fans to the motherboard and then powered up. The fan literally jolted and that was all. So this tells me that the fan was at least very briefly getting some sort of power from the motherboard but not when it was wired straight to the psu. But why doesn't the fan keep spinning when attached to the motherboard, because the lights on the motherboard stay on?
I'm not sure how many rails this power supply has as I'm not entirely sure about what rails are. I'm fairly sure it has 2 though. So my best guess so far is that one of the rails has gone on the PSU. I did try resetting the bios with the jumpers incase the motherboard was somehow a problem but it didn't appear to do anything. It just seems that the computer very briefly attempts to boot up but then stops straight away.
I'm trying to save a bit of cash to fix it but I don't want to fork out for a replacement PSU incase there could be a different problem. Does anyone have any suggestions to what the problem could be? Also does anyone know what the amperage requirement is for an ATI 4870 1GB? (I've searched that loads and can't find a definitive answer - would be useful to know for my potential new PSU).
Thanks so much for any help that anyone can give
So he said that he was watching a film on the computer with no problems (there has been no problems with this computer since it was first built), he left the computer for a while and it had gone into sleep mode by the time he came back. He went to turn it back on but the power light just flashed on briefly and then off and that was it. If you try and boot the computer up that is what happens, sometimes the HDD light flashes on and off with the power light. If you press the power button again, nothing will happen until you turn the switch off on the back of the PSU and then back on again. However, when you do try and turn it on, the lights come on - on the motherboard and the power and reset buttons on the motherboard stay lit up. Also when you try and turn it on there are 2 red lights that flash on briefly on the ATI 4870 GPU (neither of us can remember if those lights on the GPU normally flash on so thought I'd mention it).
When you do attempt to power up, no fans move at all (all the fans are wired straight to the psu and a fan controller). I tried wiring one of the fans to the motherboard and then powered up. The fan literally jolted and that was all. So this tells me that the fan was at least very briefly getting some sort of power from the motherboard but not when it was wired straight to the psu. But why doesn't the fan keep spinning when attached to the motherboard, because the lights on the motherboard stay on?
I'm not sure how many rails this power supply has as I'm not entirely sure about what rails are. I'm fairly sure it has 2 though. So my best guess so far is that one of the rails has gone on the PSU. I did try resetting the bios with the jumpers incase the motherboard was somehow a problem but it didn't appear to do anything. It just seems that the computer very briefly attempts to boot up but then stops straight away.
I'm trying to save a bit of cash to fix it but I don't want to fork out for a replacement PSU incase there could be a different problem. Does anyone have any suggestions to what the problem could be? Also does anyone know what the amperage requirement is for an ATI 4870 1GB? (I've searched that loads and can't find a definitive answer - would be useful to know for my potential new PSU).
Thanks so much for any help that anyone can give