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#1
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PSU problem with AMD/Gigabyte combo?
Hi,
I'm trying to fix a computer belonging to a local charity, and am convinced that the problem is the power supply- but this doesn't explain everything. Stay tuned for weird tales... I was told that, at first, the problem was that pushing the (case) power switch caused the fans to start up, then cut out as nothing happened. When *I* tried it, however, pushing the switch had no effect at all- it was seemingly dead. I took the machine home with me and connected the power supply from my P4 case (Athlon-compatible) to the Athlon-machine's mobo. The case fans started up *as soon as the mains power is on* (i.e. without pushing the case-power-switch, which doesn't turn it off either) The machine does *not*boot, and (importantly?!) the CPU FAN DOES NOT TURN, although it's plugged into the motherboard. Although the heatsink is attached, I don't want to leave the Athlon powered-up too long. So far... not good. I reconnect the machine's own power supply and get *momentary fan movement*, then cutout, just as described above. Thinking that there was residual power from the P4's "good" PSU, I try it again... more fan action, then cutout. Same thing the third time. Two other points- the CPU fan (a) Looks too small for an Athlon (same size as the one on my Pentium I 233MHz and (b) Requires far more friction to push it round than the one on my P4, and looks squint. Should it go round when I blow air at the right angle? So, to be brief- - The machine's own (faulty?) power supply either causes short-lived case-fan activity then cutout, or doesn't work at all - Having the other (working) power supply connected causes the computer to start as soon as mains power is applied, but it doesn't boot and the CPU fan doesn't work. I would greatly appreciate *any* feedback or thoughts that helped me solve some or all of this, or at least gave me some pointers. Thanks! - Michael S |
#2
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"Michael Strorm" wrote in message om... Hi, I'm trying to fix a computer belonging to a local charity, and am convinced that the problem is the power supply- but this doesn't explain everything. Stay tuned for weird tales... I was told that, at first, the problem was that pushing the (case) power switch caused the fans to start up, then cut out as nothing happened. When *I* tried it, however, pushing the switch had no effect at all- it was seemingly dead. I took the machine home with me and connected the power supply from my P4 case (Athlon-compatible) to the Athlon-machine's mobo. The case fans started up *as soon as the mains power is on* (i.e. without pushing the case-power-switch, which doesn't turn it off either) The machine does *not*boot, and (importantly?!) the CPU FAN DOES NOT TURN, although it's plugged into the motherboard. Although the heatsink is attached, I don't want to leave the Athlon powered-up too long. So far... not good. I reconnect the machine's own power supply and get *momentary fan movement*, then cutout, just as described above. Thinking that there was residual power from the P4's "good" PSU, I try it again... more fan action, then cutout. Same thing the third time. Two other points- the CPU fan (a) Looks too small for an Athlon (same size as the one on my Pentium I 233MHz and (b) Requires far more friction to push it round than the one on my P4, and looks squint. Should it go round when I blow air at the right angle? So, to be brief- - The machine's own (faulty?) power supply either causes short-lived case-fan activity then cutout, or doesn't work at all - Having the other (working) power supply connected causes the computer to start as soon as mains power is applied, but it doesn't boot and the CPU fan doesn't work. I would greatly appreciate *any* feedback or thoughts that helped me solve some or all of this, or at least gave me some pointers. Thanks! As a built-in protection, if the HSF doesn't start the system powers off? Try a different HSF. |
#3
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"Smoker" wrote in message .. .
As a built-in protection, if the HSF doesn't start the system powers off? Try a different HSF. Good suggestion, but when it's connected to the P4 power supply, it doesn't power off. In fact, it comes "on" without any button being pushed, there's a series of semi-regular clicking sounds (which do not stop) and the STR_EN motherboard light keeps flickering. That's only with the P4's PSU, of course. Good day today.... my 15-month old monitor isn't working now either (flicker fzzt fz fzzt, you know the score... *sigh*) - Michael S |
#4
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Could the CPU itself be faulty? Or perhaps their is a problem with
the socket itself causinng theMB to freak out? Michael Strorm wrote: "Smoker" wrote in message .. . As a built-in protection, if the HSF doesn't start the system powers off? Try a different HSF. Good suggestion, but when it's connected to the P4 power supply, it doesn't power off. In fact, it comes "on" without any button being pushed, there's a series of semi-regular clicking sounds (which do not stop) and the STR_EN motherboard light keeps flickering. That's only with the P4's PSU, of course. Good day today.... my 15-month old monitor isn't working now either (flicker fzzt fz fzzt, you know the score... *sigh*) - Michael S |
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