Hi guys just going back on this old topic. I came across another problem.. I have made an Hirose cable wired to 1 & 4 only (as RPSharman mentioned) to be able to power my 744 externally ONLY without charging it but for some strange reason the orange LED still blinks and charges the machine at same time as powering it. Now just to specify, the cable was made by a professional engineer and I went back to him to double test the cable and nothing wrong was found with it. So my question is,, Is anyone aware of any problems with firmwire 2.66v giving this problem? Or do you have any other thoughts on why this is happening? Thanks in advance.