Chosen Solution
I have 2 Logitech Z906 systems that have been working properly. One now will not turn on, no lights, nothing. I have checked the fuse and power to the end of the input plug, All seems fine. I did see somewhere about holding the power button on the remote for 8+ seconds to reset but this didn’t do anything either. Anyone help please, I’m perfectly competant to pull it apart; although not an electrician I am an engineer and could probably/possibly fix it with guidance.
Had the same issue with my z906. Visited a shop who took half an hour to replace a part that was used as a safeguard to protect the motherboard from overvoltage. He then said that he added an additional safeguard which looked like a small blue balloon, that if in future there is an overvoltage, only that part need to be replaced, and that will take only a few minutes.
Hi @krisdvv , Post some close up images of the board(s) back here and hopefully someone will spot what you can’t. Here’s how to do this on ifixit Adding images to an existing question The 3 images in Reply post #30 of this link shows what the damage may look like in your speakers if it suffered from the same problem but maybe not. Click on the images to get a close up view
