I recently seen an instructable on converting an old computer PSU into a lab power supply. I followed it correctly, connecting the orange wire to the brown, the green to black and a 10W Wirebound resistor across red and black. The PSU turns on and all of the voltage rails work (although some are out by +-.75V sometimes), but I can hear a faint screeching noise and the fan doesn't spin.
I though the screeching may be normal because all I normally hear is the fan, is this okay.
The fan is rated at 12V 0.3A, but when I measured the voltage over it, it was only 3.4V, why is this and how do I fix it.
Any help appreciated, Thanks.