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This is one of those knockoffs of the hlg550 that you wire up yourself. I'm sure I have the polarity right with the wiring, but only two of the four panels are not lighting up. However, the two that don't light up are the ones that are not directly connected to the driver and are just wired to the other panels. There is power going to them becuase they do get warm after being left on a while. Has anybody experienced this before and resolved it? Or does it mean that two pof my panels were damaged? Thanks a lot for any help,
