VF50 IT version with backlight not working

Have used VF50 SOMs in our design, work fine. Now have VF50 IT version. Backlight PWM not working in 100% of shipment, testing 6-7 boards out of 60. Swapped a non-IT version in and it works fine in the same board. Good VF50 serial number 04873320, bad IT version serial number 04893339. Both labeled as V1.2A

@pgrosshart As you mentioned in your email to me, the issue appears to be related to your use of an old version of code and not the hardware, so we will mark this case closed. Thanks for communicating this information to us.