So I updated OFW to 9.1.0, then downgraded to 8.0.1 via nand backup. Since the fuses weren't equal I could only Boot via dongle into Sx Menu, but not start any fw. Also I had installed autorcm, but since I didn’t have used the switch for some time because of the first problem, I can’t even get into sx menu anymore. Seems like the battery drained. Also tried connecting it to the pc, but since it’s not on it also doesn’t get recognized. So what can I do to at least get the Switch loaded again, so it autoboots with the dongle again?