Grid not showing when zoom in

I’m sure this has to be a very silly problem, and i’n not sure if i’ve hide the grid whit a keyboard shortcut, but when I zoom in I don’t see the grid as usually. I’ve checked grid space (1) and subdivision (1) and everythig seems correct. I opened another file and works correctly. Any help?

Could you send me that file?

OMG! I’ve just discovered the problem: my new monitor contrast adjust is burning the grid over the white background (but showing it on the overshot areas with salmon background). Sorry and thanks for your quick response!