It's an internal power supply, so that makes things a bit risky. If you are able to remove the power supply board and inspect it, look for bulging and/or leaking capacitors. If you find any its probable that replacing them will fix the issue.
whether I'd go that route at this point is a toss-up.
Generally electronics that last for 1 year will last for several, but the failure rate seems, (in my experience) to start trending upwards again at around 10 years.