iPhone stuck at " it may take a few minutes to activativate your devic

i have a iphone SE 32 gb Silver model, unfortunately, the power button stopped functioning, i took for repair but the issue could not be fixed, my repair mechanic had an iphone se gold color model lying with him, he swapped my logic board inside the housing of the gold one, just the logic board nothing else, everything seamed to work fine, untill today i erased all my data to setup as a new device and now my device is stuck at activation screen, i left it connected to itunes whole night and still, its stuck on activation , is it the the housing swap and internal components the culprit ,does any one know whats causing the problem, as i have changed sim, switched to different wifi's, also checked apple system status, done everything thats on the internet, still no sucess , if anyone has faced a similar issue please help !