Hello, the 3rd digit from the left on ALL FOUR Pinscore displays on my Pinbot work fine on power up. However, after 1-2 mins, ALL FOUR begin to fade and eventually go completely out. I wiggle the J1 and J2 connectors on the MPU board and they come back for a second. Any idea what I need to do? Replace the J1 and J2 connectors? Is there a problem with my Mpu board? Thanks everyone!!