Thanks Windell. I am having some difficulty locating the short. Also, in looking at the circuit diagram, it’s actually row 1 (the second row of lights), not row 2 that has the issue. A few things I discovered in working on this:
- Using the continuity tester on my multimeter, when powered on, the + and – leads of the LEDS on Row 1 are continuous. This is not true of any other row.
- Row 1 is not ALWAYS all lit. When the device is powered on, an apparently random pattern of LEDS in Row 1 sometimes light (usually in blocks of three or four) with a few LEDS in between not lit
- My earlier statement that the LEDS show no response at all to the sketch may be incorrect. I can see them flickering slightly but they are so bright it’s hard to be sure.
I don’t know if this is possible to debug remotely, but if the above gives any indication as to where the short could be, could you please let me know? Thanks in advance.