Posted: 7/30/2013 8:55:33 PM EDT
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I put an old PC back together and am trying to get it to run. I assembled everything, including a near-new, good quality, 650W power supply.
Mobo is an ASUS P4P800E with a 3.0 GHz Pentium 4 processor. The thing is, it won't run. It doesn't beep. The fans don't spin. Nothing,... stone cold dead. I've checked all the connections. I stripped out all but one DIMM in the A1 slot. Yes, the RAM is the proper type (PC3200). The green LED on the motherboard lights up. But when you push the "on" button - nothing. It's so dead, I'm not sure where to start. Any ideas on how to proceed? |
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I'm going to disassemble and reassemble it.
I will check for the jumpers when I do it. I do have the manual. I just put a fresh CMOS battery in but will try another in case it happened to be a brand new but dead battery. If you can think of anything else I should look for, please let me know. |
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Quoted: I always Test power supplies before I put them in the system. At one time you could get power supply tester on eBay for $3 free shipping Posted Via AR15.Com Mobile |
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The only other thing I can think of at the moment is to check the power supply lead pins for physical abnormalities. Otherwise, maybe go through the manual and make sure the parts are supported. Maybe the CPU is reporting a speed the MOBO can't handle or something.
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Quoted:
Or just buy a volt meter from the local hardware store and use a paperclip, its a better way to test. The PSU testers wont tell you if voltages are wrong, they just let you know if a rail has failed totally. Quoted:
Quoted:
I always Test power supplies before I put them in the system. At one time you could get power supply tester on eBay for $3 free shipping Posted Via AR15.Com Mobile I have a voltmeter and was using it last night. I was able to read a 4-5 V on a few pins but saw no 12 V or 3 V outputs. I tried this on two different supplies and only got the 5V on both. It seems something is wrong with all my power supplies??? That doesn't make sense to me, especially since the one I want to use is relatively new. I'll go check again. |
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I'd start swapping out parts one-by-one until I found the culprit. Start with nothing but the bare basics, unplug everything that isn't essential to have the thing POST. Of course, this is only feasible if you have ready access to spare parts... otherwise you end up buying a bunch of stuff you may not need... |
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Quoted:
Paper clip test is what I use. I have the little tester thingy but never seem to have it with me. hard to beat the clip. I am betting on the power supply. Is it a new one or one you had laying around? Do computer power supplies have to be under load to read correctly? Should I get 3V, 5V and 12v when the supply is on but open circuit? Which pin is which? Which is the return or ground? |
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Quoted:
I put an old PC back together and am trying to get it to run. I assembled everything, including a near-new, good quality, 650W power supply. Mobo is an ASUS P4P800E with a 3.0 GHz Pentium 4 processor. The thing is, it won't run. It doesn't beep. The fans don't spin. Nothing,... stone cold dead. I've checked all the connections. I stripped out all but one DIMM in the A1 slot. Yes, the RAM is the proper type (PC3200). The green LED on the motherboard lights up. But when you push the "on" button - nothing. It's so dead, I'm not sure where to start. Any ideas on how to proceed? Start with the basics. Is the power button hooked up properly to the motherboard pin header. |
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Quoted: I have a voltmeter and was using it last night. I was able to read a 4-5 V on a few pins but saw no 12 V or 3 V outputs. I tried this on two different supplies and only got the 5V on both. It seems something is wrong with all my power supplies??? That doesn't make sense to me, especially since the one I want to use is relatively new. I'll go check again. Quoted: Quoted: Quoted: I always Test power supplies before I put them in the system. At one time you could get power supply tester on eBay for $3 free shipping Posted Via AR15.Com Mobile I have a voltmeter and was using it last night. I was able to read a 4-5 V on a few pins but saw no 12 V or 3 V outputs. I tried this on two different supplies and only got the 5V on both. It seems something is wrong with all my power supplies??? That doesn't make sense to me, especially since the one I want to use is relatively new. I'll go check again. |
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Have you tried testing outside the case?
Download the manual from here: http://support.asus.com/download.aspx?SLanguage=en&m=P4P800-E%20Deluxe&os=17 Make sure the front panel connections are set-up correctly (especially the power switch) What PSU are you using? Make sure you are using the correct lead for the 4pin (P4) connection. |