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PC Not Powering on... Why not?

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scofthe7seas:

--- Quote from: Rando on May 16, 2011, 02:51:48 pm ---
--- Quote from: scofthe7seas on May 16, 2011, 02:28:37 pm ---Also, try powering up with nothing plugged in, then add one component at a time. Even the ram, if you get some beeps about no ram, that's a good start.

--- End quote ---
I currently have everything (monitor, speakers, keyboard, etc.) disconnected, it's just the PC and it's internal components at the moment.

I'll unplug some internals and see what happens.

--- End quote ---

Yes, I meant internals. Make sure all the drives and such are unplugged, a short in one of those could be causing the boot failure.  I don't know if I've seen a keyboard/mouse stopping a PC from booting before :D (though a peer claims he has)
The more I think about this, the more I lean towards a bad motherboard :-\
Also, what Malenko suggested is something to look into. Google your Dell model with the words "diagnostic lights" and one of the books for your model should come up. There should be either a set of glowing numbers in the front of the PC, or 4 numbered lights in the back. See if there is a match in the instructions found online.

Thenasty:
100% it's the PSU.  :P

BobA:

--- Quote from: Thenasty on May 16, 2011, 08:46:29 pm ---100% it's the PSU.  :P

--- End quote ---
If it is not the PSU then it is the MB and if that is the case toss it.

muggsy:
The Dell SX270 has a known problem with capacitors ... if you look on the mainboard you'll probably find some are leaking (or whatever you refer to it as)

Used to support a heap of these models and had to get Dell in weekly to replace mainboards. Not sure if this is helping you though, probably need a new PC , or a least mainboard, CPU and memory

Links
http://en.community.dell.com/support-forums/desktop/f/3514/t/17329889.aspx
http://www.badcaps.net/forum/showthread.php?t=2607
http://thecapking.com/sx-270.html

scofthe7seas:
Right Right, the bulging cap issue. Bleh. Forgot about that, was a few years ago ;)

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