Apart from the obvious ones, like checking the fuse…. no, it sounds like a power supply problem.
If the meter lights still work but nothing else, then it’s an electronics problem in the power supply. If the unit is completely dead but the fuse is OK, then it’s the mains transformer. In any event send it to me at the Sound House (The Sound House, Hunsdon Road, Torquay, TQ1 1QB) and I will fix it. The cost will be a simple servicing charge of £30 plus the cost of returning it to you (In the UK that’s about £6 for a T2).