Hi all, Im stumped. This is my 3rd P2 that I have for my matrix. Matrix is 26x50 individually controlled (30IC/30led per meter). The first 13 lines are Output 1 (650px), the 2nd 13 lines are Output 2 (650px). I have power injection from every 2nd strip. Strips 1-13 from PowerSupply1, Strips 14-26 from PowerSupply2. From the moment I turned them on all but 3 were working, strips 11-13. I intially resoldered all the joins...nothing Rewired the connectors that I have from power injection points to power supply Triple-checked P2 config Data does appear to be going to the strip? Power still appears to be going to strips as well as tested with multimeter. We (alec spent time helping me out, thanks alec!!) tried going straight from #10 strip to #13 (have to skip 2 due to direction of strips), nothing. Tried going straight from #9 to #12, nothing. The last working strip is #10. #11-13 have been out the whole time when part of the matrix. However if taken away from the matrix and plugged directly into a P2 output, #12 & #13 work. Only strip #11 doesnt. As this strip is each led has IC I tried at different sections along strip #11, still nothing. Unfortunately I only have 1 spare bit left JUST long enough to replace it so decided to try that. That works directly from P2 output, but once again, once added to the matrix doesnt work. I have swapped over the 2 x P2 data cables as well, put Output1 wiring into Output2, the same. Pixels 501-650 will not work within the matrix. Problem could possibly be #10 strip? Tomorrow I will try and go from 9-12-13-10 just to see if it works. An ideas anyone? Update edit: I just hooked up PowerSupply1 that has P2 and power injection to #1-13. I had the new bit of strip + 12 & 13 hooked up and all 3 worked at the same time, first time Ive seen it. Thats a start, so will try the above 9-12-13-10 tmrw.