Quote Originally Posted by quebec001 View Post
Yes i saw via USB and my PC,
HWID IS 1275
Does that mean you saw the montana as "GARMIN Device" in Device Manager just before the calibration screen appears on it? Yes? If so, read on because that's preboot mode when it's seen in Device Manager.

it's just that any procedure requiring to touch a corner of screen or other same time power button is currently impossible, because touch screen is not possible at the moment
I understand that but if you're correct in your statement this isn't a hardware problem then downgrading the firmware may fix the non-responsive screen.

And i never made and using fw_all.bin with a text command
That's next thing to try if flashing an RGN lower version doesn't work. Find an old version GCD and convert to RGN to flash, do you know how to do that?