I've been following this thread with interest as my mste power and hdd led rusted off. The metal bracket is fine though. I've been looking for the required spec of the replacement LED and the only thing that seems consistent is that it is 3mm. Colour and voltage all seem a little confused: is the hdd meant to be yellow or green and is the led driven by 3v, or doesn't it matter? I might put an ultrasatan internally, and was considering using a bi-colour led to get activity for both slots... not figured out what circuit is needed on the US to not drive both... but fitting a dual-colour / 2-wire led now (e.g. this one) might give me yellow for now but option of using the other colour later. Anyone else tried this? Steve.