HomeBase 2 Lights

I have a Homebase 2 with 4 cameras. All working fine - except the blue light on the Homebase unit itself has recently started flickering on and off, and sometimes goes off altogether. Whilst it does this I have interrogated the system and can still see live feeds from the cameras and I can also review previous events so the unit still seems to be working.
Any ideas ?

So after 2 weeks of flickering, the blue light has disappeared totally.
I’m thinking it’s just an LED failure as the system is still working properly.
Anyone else here have experience of this or is it just me?