Cyton Board, broken switch
Hello all,
This is my first post here and I'm very happy to be part of the OpenBCI community.
I'm facing an issue with the Cyton board due to an unfortunate event where the SW2 switch broke while fitting the board into the 3D printed enclosure.
Afterwards, I was having issues keeping it ON (with BLE selected), I tried to just short the terminals but it only worked once and I think I might have shorted something, finally, whatever I try now the Blue LED doesn't light up.
Also, it's worth noting that after the above happened, I tried connecting RAW directly to R11 but it also didn't work, could you please advise on how to fix this or at least how to debug it?
I'm working on an urgent and a critical project and I would be happy to get it fixed. And also I think on my final trial with R11, there was smoke coming out of R11 resistor, and that's when I stopped everything as not to cause any much damage 
I was also told to ask William @wjcroft for his opinion and I would appreciate it.
Kind regards,
Hefnawi
Comments
Hefnawi, check out this related post,
https://openbci.com/forum/index.php?p=/discussion/2289/cyton-slide-switch-repair-solved
If you have destroyed any components, replace them.
Regards, William
Hi William,
Thank you so much for your prompt reply, I will check the other discussion and let you know how it goes.
Thanks,
Ahmed
Hi again William,
Thanks again for the link, it's basically what I tried to do, but in my case I believe I shorted something =(
I took measurement on the U5 DVDD which should be 3.3V right? And it was only reading 0.02V instead.
I will start by replacing the R11 resistor and the U5 3.3V regulator chip, do you recommend any other tests that I could do in order to trace this further than the 3.3V at this stage?
Thanks,
Ahmed
If the regulator is blown, that and R11 is your first priority. Check the other resistors and diodes in that schematic area if that is not sufficient.
Thank you!
I will keep you posted once I replace them.