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My 300 watt ATX power supply was going out. So I opted to buy myself a new one. Since most were over 300 I just decided to get a 350. I also decided that so that my system would run smoother. I put alot of stuff in my pc and was afraid that 300 was not enough. This 350 watt power supply has the same voltage and everything as my 300, The only difference is its much newer and more advanced. It has built-inrush current, over temperature, over current, and over voltage protection circuits.
So I plugged it in, Actually just to be safe, I plugged it in only to the MOBO, system fan, and cpu fan. I unplugged my graphics card, Sound Card, 2 Hardrives, but left the zip drive CD-rom and floppy in.
So all that was plugged in was MOBO, PC fans, CD-rom, Floppy, Zip. I tried to turn it on, and it tried to start for like a milisecond, then shut itself off. then it wouldn't ever go back on.
I then unplugged everything except the MOBO and PC fans, still did the same thing. Started to go then it shut itself down.
I plugged my old power supply to make sure everything was okay. It worked fine, PC booted up.
Okay, So I tried the new one again, still nothing. I dont understand why its not working. The two power supplies have the same voltage i know that much there both ATX, The newer one has more wattage thats for sure, but what gives?
Is your PC a Dell? Many of those have proprietary power supplies.
Otherwise, compare the wires coming from both power supplies going to the motherboard connection. According to their colors, are the wires in the same positions on both plugs?
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Dell non-standard power supply
http://www.quepublishing.com/articles/article.asp?p=339053&rl=1
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My computer is not a Dell, It is made by PCChips i bought this computer about 3 years ago... from nextgen computers. They build custom machines using many different brand of Mobo and hardware. Here is the website to the exact model of my mobo that i have
http://www.telecommander.com/pics/links/mainboards/pcchips810lmrmotherboard/PCCHIPS810LMRMotherboard.htm
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Oops, is the 110/220 power switch in the back set correctly?
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The only thing I haven't tried with this new power supply is plugging in my HDD's and sound card and graphics card. Is it possible, that since this thing has like over voltage protection or whatever, that it just wouldnt work unless there were enough parts that require more power?? I could plug everything back in, graphics card, sound blaster live, 2 harddrives... What do you think??
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Not very likely only_leviathan, the power supply has voltage regulators on all the lines.
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Go ahead and hook up some drives to give it more of a load to respond to. It shouldn't make any difference but at least you'll know for sure.
Since it's not a dell it's unlikely either is a proprietary PS. But did you match the wire colors in each connection as I mentioned above?
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All the wire colors are the same except the very last ones that have 2 wires going into the pin... Both supplies have 2 orange wires going into the last pin, either the 1st or 20th pin I don't know, but its orange and brown on the new one, and orange and orange on the old one...... That one brown wire is the only difference, but it still has an orange wire going into it same as the old one.
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That brown wire is a sensor for the 3.3 volt output. I'm not sure what happens if it detects a problem but I doubt if that's the reason for it not working. Ham30 may be able to provide a better explanation.
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