I agree with Eddie... I had a similar experience with my R1800. The first message is kind of a warning, I think it said something like "parts are nearing the end of their life." The key word is "nearing". The printer will continue to function until the second message, where it might say something like "at the end of their life" and the printer stops... with the paper button and the on/off button flashing alternatively.
That's the best of my recollection - which I don't state with a 100% guarantee of accuracy!