I'm having something similar with my TiKB - when I unplug from the mains and plug it back takes forever for the red led on the transpose buttons to come up. I will get to the bottom of that but don't have time right now, but my steps will be:
1. Check if the power supply produces 12V,
2. if yes - go to 4
3. replace with new
4. replace all capacitors in the power section on the mainboard - I had something similar with my Indigo.
Virus B / Indigo has had issues with failing electrolytic capacitors and I'm assuming something similar happens to newer models (like my Ti).
I'll revisit this post when my "fix" will do the trick.
Cheers
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