Re: Head Unit will not update HELP!!!! Postby firebretha » Tue Dec 28, 2010 2:20 am Digital Aquatics wrote: This can happen and is caused by the lack of power to program the head unit. Here are the steps to get you up and running. 1) Grab a PC4 and plug it into AC power 2) Plug the head unit into the PC4 via a bus cable and power on the PC4. 3) Plug the SID into the PC4 and open up myReef. 4) Click on the RKE (in myReef) and then click the "Update" button. (myReef will pop up a warning about what you can and can't do, not completely sure as I've not see it recently.) 5) Proceed with the update and allow it to program the flash. (You may see the icons on the scree start to appear as it's updating. 6) Once the update is complete do a reset on the head unit and you should be set! Let us know if that works. This is a corner case situation BUT now that you're updated to 2.0 the flash shouldn't be changing.