Greetings!

This is my first post on the forum– hopefully somebody can give me a clue/lead…

I’ve had my Mitsubishi HC3800 for several years now (bought it used from a showroom). It’s been a real champ. Replaced the bulb a couple of times.
The last time I opened it up to clean out a fan as I was getting a high temperature error and decided I would clean the colour wheel. Big mistake I think!
It made noise and the screen was weird after that.
I bought another wheel off eBay, put it in and fired it up.
Everything works normally for about 20 seconds.

Then the display goes from normal colours to black-and-white and jittery and shuts down within about three seconds.
This process is very repeatable.

There’s a slight vibrating noise during this “black-and-white” display episode.
After the flashing green LED as it cools down, I can immediately restart it and see the same again.
Any ideas??