Mine's also a few months out of warranty. Keeps turning on randomly, called Bose and basically was told to not use the wireless function.
Super annoying, Bose please get better customer service and please fix from what I can tell is a pretty widespread issue. These are $349 headphones, step up your game.
Dec 6, 2018
I have the same issue too. I got mine from amazon around 2 years ago. It is power switch issue and there are about 100 cases like this on amaon having the similar issue. I think Bose should step up and do something about it.
I ran an experiment using the latest information about setting the Standby Timer to 5 minutes. I determined that if you set the Standby Timer to 5 Minutes the headphones will in fact turn off after 5 minutes. HOWEVER, and this is important, if you leave the device bluetooth set to ON, then if another few minutes go by, the headphones will turn back on again. To test this again, I both set the Standby Timer to 5 minutes AND turned off the bluetooth on both my iPhone and iPad. Now the headphones stay off as long as the bluetooth on my devices stay off. I am in the process of doing a second test to confirm that the Bose turn back on if the iPhone bluetooth is ON. After the turn off, I turned the bluetooth on 10 minutes ago and the Bose have not yet turned back on. This is a very MANUAL old school way to working around this digital age problem. Will update this thread later with the further test results.
My next test after that will be to see if UNPAIRING the device from the Bose has the same effect (my theory is that it does). If it works, the benefit of doing the UNPAIRING trick that way would be that I could leave my bluetooth for my phone on and use the phone with other bluetooth devices and only connect to the Bose when I want to use them specifically. For either method, I have got to believe that this is a software issue with the Bose that should be fixable.
Jun 29, 2018
Problem with your theory is many, many of us had this issue come up long before ever doing any software updates. Mine were factory firmware for 14 months before it started happening without ever having done any updates to anything. Only ever updated once I found my way here looking for solutions.
There's 100's of posts on this issue, and Bose has stopped replying to most of them. There isnt going to be a fix. They will just wait out the in-circulation procuct lifespan of the QC35 gen 1's and move on. Eventually nobody will have them anymore and problem solved by attrition.
Fair enough - they may not fix it. I am just saying 2 things: 1) it should be fixable and 2) there actually is a work around. This is only valuable to people who want to keep using these things until the truly break. If that is not you, then by all means chuck the Bose in the bin.
Yeah I just found a whole bunch of compliants as well. Can't believe so many people have voiced this issue without Bose coming up with a solution for us. Definitely not spending another penny on Bose products until they get this fixed.
Dec 1, 2018
The following process has completely fixed the problem on my headphones. In a nutshell, you are opening up the headphones, taking the power switch out and pushing the prongs on the switch slightly outward so they make full contact with the circuit board. Another user later posted some pictures of the process here.
You will need one small Philips screwdriver for the screws and also a small flat-head screwdriver or some other small, thin tool.
Dec 7, 2018
Echoing other posts that my QC35s (purchased in October of 2017, manufactured in May of 2017) have started to turn themselves back on despite the switch being "off".
I've tried everything including disconnecting all bluetooth devices, still turns back on.
Odd thing is this didn't start happening while using or shortly after using the QC35s. They were on a stand on my desk, not having been used today at all, and suddenly turned on.
Now if I turn them on and use them, then turn the switch back to off I hear the three note powering off sound followed shortly by the three note powering on sound.
Jun 15, 2018
bookkeeper - what they failed to tell you and perhaps they don't even know is that it is one of two (or both problems): 1. an implementation of bluetooth low emiission (BLE), which causes it to turn on when in proximity to another ble device - paired or not paired - yours or someone else OR 2. a faulty on/off switch. Bose support people are looking at a sample set of QC i's (including mine), in order to pin down the cause. If #1, they would have to change the firmware towards a different implementation of BLE. No idea on how long that would be until a new firmware version came out but if you were patient, the firmware update would 'fix' the issue. If it were #2 it would probably look like some sort of recall. My pure guess would be that you would have to send it in to get the switch replaced. Though I would be cllueless how that would get implemented.
Just fyi - I now have a QC ii and have not seen that behavior so far, but I have a Soundsport wireless (with connecting wire), that turns itself on and I also have Revolve's that will turn on every time I power on my paired laptop.