Help SUdden Z endstop change logic in marling

Hi Guys thank u for taking the time to help,
i have a cnc with ramps 1.4 with marling i do not have the modified marling for my firmware so config.h is out of the question.
The problem
i manage to send a g-code command or something that make the logic of my z axis end stop to change from NC to NO and now i cant get it back no reset helps and i cant zero my spindle with the probe
ANY help will be appreciated

What firmware are you using.
I know mk4duo uses M123 Z0 orZ1 to reverse endstop logic

There is no way to do this in Marlin without recompiling it.

Yes, this is why i dont get it i was thinking about repetier as the guilty one. or ....a cable problem dont seems to be, since every thing works just in the oposite logic. thank u any way guys i will probably try to backup the modify marling or just re solder the cables grrr.

It has to be a hardware fault... most likely a bit in the flash has flipped