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Power Supply Issues PC Won't Power Up

Hello, I just installed a new PSU (model Sentey XPP 525-PS) to my Dell XPS 410 (Dell Dimension 9200 XPS 410 Motherboard CT017 WG855 WJ668 JH484). The light on the mb is on, and fans spin and then stop 2 seconds later when I press the power button. Can anyone help me here, please? Thanks, Harper
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  1. Best answer
    Why did you install a new PSU in the first place?

    Also, that PSU is pretty garbage.
  2. Did you double check your connections?
  3. PSU connected to the MB via the 24 pin connector. The MB also has an IDE 4 pin connector, but I'm using SATA on those devices so it's now not connected. Everything else, I'm quite sure, is connected.
  4. You need to connect the CPU power connector. It is a 4 or 8-pin (depending on the MB) connector on the MB.
  5. the only reason I bring this up (and have done so twice today) is that this is the major issue with my computer, and to rectify, I play musical chairs with the ram, video card, and cmos battery. This always fixes the problem, as usually something just wasn't seated properly. It doesn't give me the three or four beep error code, just starts, fans spin, than stop seconds later. That's my fix, for what it's worth.

    Sorry if that didn't help.
  6. I uninstalled two power supply to MB connections: 24 pin and a 4 pin. I guess it's this 4-pin connector. The problem is that on this mb, the 4 pin plug is square and the 4-pin connectors on the PSU are in a row. Can I get an adapter for this, from a row to square? Thanks
  7. The 8-pin plug should be OK. Just use the half that fits your 4 MB holes.
  8. harpersedg said:
    Hello, I just installed a new PSU (model Sentey XPP 525-PS) to my Dell XPS 410 (Dell Dimension 9200 XPS 410 Motherboard CT017 WG855 WJ668 JH484). The light on the mb is on, and fans spin and then stop 2 seconds later when I press the power button. Can anyone help me here, please? Thanks, Harper
    Your issue is indicative of the CPU power connector not being connected, or not connected securely.

    ftp://ftp.dell.com/Manuals/all-products/esuprt_desktop/esuprt_xps_desktop/xps-410_Owner%27s%20Manual_en-us.pdf

    Check out page 81, item #20 on the diagram on upper left corner. That is the 4 pin CPU connection. That has to be plugged in, or you will not get to boot. It is keyed, so you can't plug that into the incorrect spot (unless you force it, which will fry the motherboard or power supply ..or both).
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