LJ6L light stays on and printer does not print

[Joel]

LJ6L printer 4+ year old. Error light stays on.

It worked until yesterday. When it was printing several pages, it
stopped printing midpage. I opened it and pulled the paper out (and it
came out whole). Now the yellow error light is constantly on (not
blinking).

There is no paper stuck in the printer. The toner cartridge looks
fine. I press the little button on front and wait for the 3 lights to
come on in sequence; it goes thru the sequence but always ends up with
the error light on, and the printer will not print at all. I unplugged
the printer for 10 minutes and disconnected it from the PC. No change.

Any ideas what I could try?

Thanks!

Joel