This fate has befallen all my machines older than 15 years or so. They won't turn on, or turn on and fail the POST, won't boot, whatever. Sometimes there's that fine smell of smoke being released accompanying the failure.
On the other hand, my Carver amp I bought 30+ years ago still works fine and I run it 16 hours a day, every day. It's the best, by far, piece of electronics I've ever bought when considering bang for the buck. The same goes for the Dahlquist speakers it drives.