I recently built a new computer. Using an existing case with a 230w power supply, probably a bad idea. The new computer was AMD Athlon 3800+ X2 processor, 1gb DDR2 ram. 300Gb hard drive. built in 6100 geforce graphics. It worked fine for a while, no problems. Until one day it wouldn't go past the windows splash screen, I thought it may need a new power supply so I bought one. I'll admit I'm not totally sure where to fit the new cases power switch, HD LED switch etc. But it would seem there is no power at all. The new PSU is 400w. When I switch my computer on, no noise. When I switch it off, it makes a noise as if it was trying but failing.
Thanks in advance