PLEASE HELP activation problem with NB v4

[I71A]

Hey Guys, I need some help with my NB v4

Somehow my activation switch doesn't work, but it worked like 5 min ago, the only thing I did in this time is assemble the outer shell of my Graflex 2.1.
So I disasembled my saber and tried to bridge my pads on the soundboard with pliers to figure out what the problem was.

I bridged negative and main Led, and it worked fine.
Then I bridged negative and FoC and again, it worked
But then I tried to bridge negative and the activation pad (with sd card inserted) nothing happens

I believe that it could be a problem with the micro SD card, so I copied the data from the stock micro sd card to one of my own and tried again, but nothing worked yet.

I really hope that you have an idea what the problem could be, I realy want to finish as fast as possible.

Greetings
Jan

[I71A]

A small update

I just updated my currend micro sd card with the stock data package, still the activation switch doesn't work.

I'm now out of ideas, hope you guys have anything.

[I71A]

Another update

I just reviewed my Nano Biscotte with a multimeter, there flows power on all pads, the activation pad too.

Comon guys any ideas?

[erv]

measure the voltage on the activation pad, it should be around 2.5V. If not, you have a short on your solder pad, or fried the pad

[I71A]

measure the voltage on the activation pad, it should be around 2.5V. If not, you have a short on your solder pad, or fried the pad

I just meashured 2.4 something Volts, so the pad is intact.

[erv]

that also means the pad is physically and electrically connected to the core MCU, so nothing wrong there