@mexine
It may have gone bad.
No signal can mean the HDMI cable is bad, it can mean the HDMI input on the TV is bad, it could mean the power supply is bad (weak, since you get a light). There could be other issues, including the device itself is bad.
A Roku Express from 2019 should still have plenty of good life in it. If you have an easy return policy at a local store, trying a new device may resolve it. If it does, then you could troubleshoot further to determine which aspect of the system is bad. If it doesn't resolve it, it's likely the TV or the wall socket.
DBDukes
Roku Community Streaming Expert
Note: I am not a Roku employee.
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