(Case 00404459)
Hello Rosemarie,
For the non-working pen in question, kindly remove and re-seat the nib from that pen an test that pen on a different board. If the pen is still not working at that time, a replacement may be needed.
For assistance with verifying the warranty status of the pen in question, kindly contact Technical Support either by phone or by e-mail with the serial number of the board with which this pen was used.