Problem after problem lol

trying to install mini gerbel v2 board in to machine i have version 2 power supply with 4 pin power not ribbon lead and tried following the guides
problem 1 installed and got green light and flashing red light installed lightburn and same did what it says and comes up with machine ready
now when i switch machine on it will not home , pc comes up with USB uknown device
where am i going wrong guys try it in lightburn and says machine paused or not responding

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