Amarant Reliability - 3 year old, multiple failures

Hi there, interested if anyone has reliability issues with Amarant lights?

I installed about 14 of these after a big garden refurbishment 3 years back. As of today I have at least 7 failures. Or at least they look like failures. I’ve ordered 2 new 100w PSU’s but it’s unlikely that as the same ones plug in and work and equally the same ones plug n and don’t work.

Units are all clean and tidy and not in high traffic areas. Next step I guess is to try take apart and have a look.

Interestingly we have about 20 Lilly units installed about 4 years ago and not a single failure. Also excellent experiences with nearly 100 internal Hue devices. It is specifically Amarants that are causing significant disappointment. Not greatly impressed with them, especially with the supposed 10 year life estimate. Having spent a small fortune on them, I can say that this is not the case.

Anyone else have this experience? Any success disassembling them or fixing? Any routes to repair I’d be very interested in. Many thanks in advance