During testing from HW utility the other day, my power supply burned up. Ordered and installed new one. This was my original PS of 6 years +. So I wrote off the failure to age of PS. After installing new one, I discovered several of my RGB floods were terminated backwards, reversed + and -, so corrected my wiring mistakes and tested from the HWU.
RGB #1 ch 1,2,3, worked perfect.
RGB #2 ch 4,5,6 not so good. ch 4 stays on, ch 5 and 6 works ok.
RGB #3 ch 7,8,9 same as RGB #2.
Disconnected ch 4 and 7. Retested RGB #2 and #3.
Results as follows: RGB #2, ch 5 and 6 still work ok. RGB #3 nothing works on it until I re hookup ch4, then ch 5 and 6 starts working again.
I suspect some shorted mosfets. Any ideas?