Processor Type: Athlon 64 X2 Dual-Core Hard Drive Size: 360 GB Operating System: Microsoft Windows Vista Home Premium Processor Type: AMD Athlon 64 X2 4200+ / 2.2 GHz Multi-Core Technology: Dual-Core Cache Memory Type: L2 cache Installed Size: 1 MB RAM Installed Size: 2 GB / 4 GB (max) Technology: DDR2 SDRAM Graphics Controller Type: Integrated Graphics Processor / Vendor: NVIDIA GeForce 6150 SE shared video memory (UMA) Storage Hard Drive: 1 x 360 GB - standard - Serial ATA-300 - 7200 rpm problem is that it wont turn back on i have to unplug it to turn it on it will shut down ok but in order for me to turn the pc back on i have to unplug it wait 5 seconds and then plug it back in

Sounds like a classic case of bad capacitors. Bad caps often cause intermittent problems like you have described. Think along the lines of bad rechargeable batteries(well not exactly but a similar situation). I have seen situations where the problem lies with the caps on the mainboard and others where the problem is the power supply, I guess it may even be both in some cases. Bad caps often bulge at the top and eventually leak electrolyte, if you open the case at look at the mainboard closely it's normally obvious if the caps on it are going bad, if no problems are found I would suspect the power supply. I could be wrong on this but that's my experience with these sort of issues, if I'm right the problem will only get worse over time....

they all look good on the main board so i change the power supply and still have the problem one thing i just noticed is the led light for goes green to red when it done shutting down

I'm a little bit stumped then... Just curious what is the wattage of the old vs new power supply? What about the mains cable to the power supply, have you tried swapping that out? Sometimes(but rarely) the cables can be damaged. As for the green to red led, I have seen this before, I don't believe it's actually red(unless it's not a standard setup - ie. dual colour led ) just a very small voltage going to the green led. I'm not sure if it's an indicator of a deeper issue or a "feature" of the mainboard. Batch Variable how to