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CX400 won't power new HTPC build


kyzersoze

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I can connect the PSU to the board (24-pin and 12V) with one stick of memory installed, short out the power switch pins and the system will power up. However, if I add anything else to the mix -- another stick of RAM, case fans, HDD, anything -- then I get nothing when I try to power up. No clicking, beeping, lights, nothing. Once I confirmed that the PSU was delivering power to the board I assumed it wasn't large enough to power the entire system. My plan was to see how much I could connect and still get the system to power up. But when I discovered that I couldn't even add another 2GB of memory I started wondering if maybe I got a bad power supply. So I guess I have a couple of questions (maybe three).

1. Is my troubleshooting strategy faulty?

2. Should I be able to run this system using the CX400 PSU?

3. If I do need a bigger PSU, how big is big enough?

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The PSU is big enough, and your troubleshooting is on the right track. It sounds like there is a short somewhere. I would remove the board from the case and bench test the system to see if you are able to get farther when reconnecting your additional devices.
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