DIGITAL_IN_PULLUP Problem on Pin 9

When I configure pin 9 as DIGITAL_IN_PULLUP, it always returns “false”. Tested it with this configuration (pin9 instead of pin1). Every other pin woks fine. Is pin 9 fried? (IMP001 with April board). Thanks.

It’s not the Imp. I tried it with a different April board and it works fine. Now I have figure out what’s wrong with the first board. Any ideas?

Seems an unlikely problem, but have you tried an ohmmeter between pin9 and GND on your bad April (and the good one too) to rule out the possibility of a manufacturing defect holding this particular pin low?