Pendant screen remains blank

I pressed the on/off button on the Teach Pendant and the green light comes on. The screen blinks for a split second but never boots up. I show that i have controller power on. Robot power is off. After rebooting several times it will work? Then when i restart it again it wont reboot the screen. What am i missing here?

Have you checked the connections inside the cabinet? Unplug the pendant connector and reseat it. I would also do the SD card just because i have had that be weird before.