I have a matching set (2 x) X1C’s with the AMS.
When I turn the powercord on to both printers (hooked up to the same wallsocket)
A/ starts up at arount 30-35 seconds and turns the display on
B/ starts up at around 3 minutes and turns the display on
Both are updated and earlier started up side by side within seconds ( a couple at worst) and I cannot figure out wuzz going on nor how to fix this. (Tried several different firmwares - still same weird time differences)
So thus I come here in hopes youll extend your expertize mates and help me fix this 
Startup as in from time to power on till ready to print?
Howdy mate, thanks for replying.
Yes, this is from power on and until the display turns on and shows picture/it is started up. Edited above
First make sure the slow one doesn’t have a sd card inserted.
If not that, sounds like it could be an emmc problem, not sure how to fix, but start by going in and completely clearing the cache and deleting any models/videos.
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Definitely change the SD cards and see if the problem follows the SD card. If so, consider formattnig first, replacing second
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