Re: One very bright unresponsive row on Peggy 2

Home Evil Mad Scientist Forums LED Matrix Kits One very bright unresponsive row on Peggy 2 Re: One very bright unresponsive row on Peggy 2

#20719
Windell Oskay
Keymaster

It is likely that you have a short circuit somewhere in the control section that is holding the base of one of the transistors low– or just connecting it to a neighboring signal.  This could be either at the transistor itself (which you have already checked) or at the pins of U2, the LED driver that controls the second row.   If you have access to a multimeter, you might be able to use that to help locate the issue.