I had a discussion going not too long ago on converting my Groove Tubes Brick to UK voltage and it was resolved thanks to everyone. I now have a new dilemma! I recorded with my Brick a couple of days ago and it was working fine. Yesterday, I had another session and when I turned on my Brick, the blue on light was dead. I changed the fuse, power lead and outlet socket and still nothing. I took the unit apart today and found that when I turned it on, the tubes were glowing although there was still no blue light. I have also tested it with a microphone and also by plugging a guitar into the instrument input and it seems to be working OK. I can adjust the level with the knob on the front. At full anti-clockwise, I am still getting signal which I presume is correct. The phantom power light also works OK too. Has anybody else had a brick whose on light has failed? It seems strange that an LED would die on me. I presume the Brick will either work or not and not be working at a reduced level or anything crazy? Any thoughts? Cheers!