Re: which way are you leaning - PSU or motherboard I think psu more likely but again cheaper to test motherboard using a used 24/4 pin psu, or get a standard name brand 24/4 pin psu.  Does not have to be same model psu for V260.  The MT uses standard form factor ATX psu. EVGA often has good value n quality psu on sale[URL] [URL]
I live in west Tennessee. We were fortunate and only lost power for 6 days. No casualties around here although there was a tornado 2 miles from here. TVA had to rebuild a couple of those high voltage towers but we're back on line. However, my Vostro 260 isn't back on line. When the power went out I was able to shut down the computer normally as it is on a small UPS/surge protector. Then I went back to bed. I didn't unplug the computer though and I probably should have. Now it won't power back up. I get the green light on the power supply when I plug it in. And an orange light on the motherboard comes on near the drive connections. But the power button does nothing. I get no reaction. Anyway to tell if this is the power supply or the motherboard? I'd really like to get this working again.It's tied into too many things around here to just write it off without trying. Thanks.   Steve    
Power Supply or motherboard? A victim of the storm?