1500L locked up tight

[Torin_3]

Hello folks,
this crazy machine had the fusing assembly replaced about a month ago, and worked just dandy. Now, however, the 'ready' light stays on and seems to be staring at me in a mocking fashion ...
No response to anything, and I have tried all the resets. I do notice the drums not turning much at all when it powers up (nope, I haven't touched anything while 'calibration' takes place). Any clues? Or at least an idea on how to make it stop staring at me like that. Thanks in advance!