Beverage warmer gone bad?

So, I have one of those beverage warmers. You set your mug on it, to keep your drink warm. Got it used and I think I’ve had it at least a couple years, and has worked great, til now. I used it for my coffees and tea drinks. Last night I noticed the light indicator was off shortly after turning it on. I could not get it to come back on, even after plugging it back in. This morning, same thing, light came on, then off in a few minutes. So I got another one a bit ago at Goodwill for $4.00. This one works fine, like the old one used to. I understand things don’t last forever. But is it possible it just burned out? I don’t think I did anything. I just found it strange. On the plus side, the one I got to replace it with turned out to be blue, which is my favorite color. Old one was black.