Hi every one. I am new on Mikrotik.
I bought RB 750G.
I have the same reset switch as you had.
When I hold down The reset button by Screwdriver, Nothing happened.
But when I disconnected power cord and Hold reset button until I connected power cord in to the DC jack, then the "ACT" LED Blinks and finally my router OS reset as well as Default factory.
SO, just by holding the reset button, It can't reset itself.
Does my router have hardware problem?