Sup, don’t ask how I did it, but I broken off the reset button with a part of the board. The issue is that the router is bricked and without the reset button I can’t netinstall it. Are there any alternative ways to get it to boot into netinstall? Or if not, what I need to do to get the button soldered here, or at least short the contacts?
Sure you cannot short the bottom right side pad in your photo (as it isn’t there anymore) but you should be able to understand to what the now missing pad was connected.
So, I’ve tried it and didn’t even get to have a blinking PWR light, buuuut… eth4 started lighting up for some reason.
It lights up together with PWR when the power cable is connected and doesn’t go away.
Assuming that you have already tried both bootloaders (one with reset button pressed/shorted before applying power, the other with reset button pressed/shorted immediately after applying power), there is not much else you can try if not attempting a complete reset and then netinstall.
Should be 300 seconds, see: http://forum.mikrotik.com/t/rb750gr3-hex-r3-protected-routerboot-trouble/110650/1