Hoping someone might be able to work out what's going on with my install...
3-4 yrs ago I installed appx 9m of RGBW Led strip (60LED/m of WS2812 flavour) along the underside (soffit) of the front of my house. Whilst 95% of the time the lights are set for plain white at 30% pwr, the colours were used at Christmas/Halloween etc.
The early strip was the IP65 version where the led side of the tape has the silicon extruded covering, where I spliced on extra power feed along the length or joined the 2x 5m tapes I protected the area with PCB lacquer sprayed on.
The first strip lasted about a year, then come autumn/winter it stopped working fully, would only light the first 1.5m or so and the rest of the strip was off. To start with I found if I pressed on the first unlit LED, the rest of the strip would light. I presumed there was corrosion getting into the strip or a faulty LED and so cut the strip at that point, removed a LED or so and reconnected.
I had to do this 2 or 3 times before I got annoyed and decided to start over.
So just over a year ago I bought 10m (2x5m) of RGBWW LED strip (60LED/m SK6812 flavour) but this time the IP67 version, which is the strip inserted into a silicon tube and sealed at the ends. More a pain to stick up, but hoped it would remove moisture from the equation. Now the strip is powered from each end and a centre tapping, but as I don't need to run the strip at full current/load wont be an issue.
So a couple of days ago, I noticed that when the system turned on (the PSU and Arduino are switched via a timer) I'm back to only having light on the first 2m or so, the LEDs stop working around LED 130ish.
Again I managed to get the rest of the strip to light by pressing up on the first unlit LED for 2x nights, but tried tonight and it doesn't want to go.
Originally, given the way it always failed around the same area - I thought it was an electrical issue, but then the ability to get it working by pressing the LED made it a physical problem.
As said I thought moisture played a part even though it looked OK, but now with the IP67 version (not that i expect the Chinese rating to be fully accurate - but it is reasonably sheltered) it shouldn't matter.
The strip is affixed to the plastic soffits with adhesive fixing tape, the soffit does deflect slightly but IS secure and doesn't otherwise move. The soffit is a Tongue and groove profile, so the strip isn't in contact 100% along the way, but again I don't see any real movement at the 'grooves'.
Can anyone suggest what the hell is going on? Why do I keep having this issue and approximately in the same area?
Edit : Couldn't get pics to show