Not in the Shop, but close by (and at one point I was thinking it would have been better to drag it into the Shop to save walking back & forth for tools):
Wirk™ Exercise Bike:
I got this from Sam's ($180 delivered, list price was over $300) during the shutdown so I could get steps in when it was too cold to go outside (and you couldn't go anywhere else), and it has worked well other than the "computer" that calculates miles, speed, etc.; all I cared about was steps which are recorded by an app on my phone, so when the computer crapped out a few months ago I didn't really care. However, the other day it started making a tick-tick-tick noise that was driving me crazy: something was rubbing inside the housing.
"Hey, I can fix this!" But I hadn't calculated the effort required to get at the innards: almost an hour later I had the plastic shroud off, which required removing the pedal cranks (with the exception of rubber pedals, seat, feet and desktop, the base bike was factory assembled); and this was the hard part – I needed an impact driver (almost had to resort to my 1/2" battery impact wrench) and a puller to get the damn things off the tapered shafts. Once the shroud parts were finally off, I replaced the pedal cranks:
and tried to replicate the sound; I figured it was the proximity sensor being hit by it's magnet since the tick occurred at the same place in the rotation, but it could also be the magnet at the resistance wheel:
For those not aware, most exercise equipment uses an Aluminum disk/wheel and an adjustable magnet to develop variable resistance (an excellent example of
Lenz's Law; there are plenty of other videos on YT, and be happy I didn't use a link to the scientific details instead).
Anyway, it wasn't either – I couldn't get it to make the sound. I'm guessing that in my gentle efforts to remove the shrouds I knocked whatever was causing the problem out and it was swallowed by the Matrix. Satisfied that I had "fixed" the problem, I reassembled the shrouds, after first cutting slots for the pedal shafts so I wouldn't have to fight with them ever again (Don't worry, I covered the slots with tape so stuff wouldn't get in there, included little fingers):
On the plus side (other than a successful "repair" & reassembly), I ate up a significant portion of my steps for the day chasing tools.