hi all i am new here i have ipv8 mod and i have problem with the - button it don't work dose some one know how i can repair it since no repair shop near
I've had mine apart before and the button is just a standard tactile SMD switch. If you don't have any experience soldering surface mount devices, I would suggest you find someone with good soldering skills to change it.
You can try spraying the switch with contact cleaner first to see if that helps, but they usually need to be replaced. It could also be the chip itself and actually not the switch, some basic board level troubleshooting would rule out the if the switch is the problem.
Good Luck!
DJlsb has it taken apart in his review, it you watch how he puts it back together you can reverse that to learn how it comes apart.
Video is cued up at that section.