I had a white screen after the replacement, reset the phone and all appears well now.

I have just successfully replaced the motor, remarkably straightforward (though in parts very fiddly), and an excellent guide up to step 6.

Couple of tips -

Step 2: The screen really comes up with a jerk, I actually pulled off a connector with the initial separation and was very lucky nothing broke. Be very gentle with the initial separation.

Step 6: The white/black parts were reversed on mine, I guess it's fairly random. But all you need to know is that you very carefully flip up the smaller section, whichever colour it may be.

At this point, I had access to the motor so I tried my luck. It came out, and the next one went in, with great ease. You do not need to go any further than step 6 to do this fix. The small section of the motor still covered just slides out with a gentle tug, and my replacement is working fine.