Looking for Advice on Flickering

Hi all, have a subtle flickering happening on my Optoma hd142x. Seems I can’t upload a video here but it is a constant, subtle flickering.

I’ve had it for 8 years or so and never replaced the bulb. Is this a sign of it needing a bulb replacement or another issue? Just don’t want to spend the money if it’s time for another projector entirely. Really appreciate your help!