Yeah, but it's not the LED's that have failed, it's the logic board (mini computer) which has developed the fault. Yama had the same problem, just his completely failed, were mine has just broken in one section.
As Yama can confirm, every time you turn on a lighting option, you can hear a 'click' inside Serenity and the lights come on. That's still all the same for the working lights, but there's no 'click' for the grav rotor/engines. I have no doubt the LED's are still all fine, they just aren't being told to turn on.
Even so, I have 10 year old PC's that still work just fine, as such, so should this, it would be less complex then a calculator.
Personally, I now think these sort of things should be made different. Rather then send a power plug into the model, have all the power and logic board, etc outside, maybe in the base and just use some sort of plug that connects to the LED's. Would be way easier to fix/replace a base, then pulling apart the whole ship.