I have a Brother HL-1430 laser printer which is probably at least 5 years old. It's been running well, but recently it started making a sort of clicking noise during power up and during printing. The printer seems to still operate as usual, except for the noise.
Attached are audio recordings of the power up and printing. I've had to change the extensions from .mp3 to .txt so this site would accept them, so please change them back to .mp3 to play them.
1. What is the likely cause of the noise?
2. What could I do to fix it (I have some basic experience with fixing things)?
3. Is the printer likely to keep functioning OK if I don't deal with the cause of the noise?