I'm not going to explain the story behind this but basically I've bodged together a sata power connector and a female molex connector from one of those molex to PCI-E adapters. The sata power connector only has 5 wires going in, yellow, red, 2 black and orange. I read in another thread on here that you can ignore the orange wire and just hook these coloured wires up the the same coloured wires of the molex connector.
So I did that and then went to test my new contraption. When testing it the hard drive will power up and begin to load windows, then it seems like the computer is reset and boots again to the screen where you have the option to boot normally or launch the repair utility. After selecting boot normally the same thing happens again.
So far I've checked the connections with a multimeter and they were alright, I don't know what to do now though, any help?
The PSU is just an old OEM one, 250W with only molex and floppy connectors, hence why I'm doing this
The HDD is a 2.5" hitachi drive, which was working fine about 2 weeks ago, but I haven't checked since.