Some things to check to get you started:
#1 -All connections that were disconnected, are they back in place and tight?
Only plus and minus battery connections was disconnected, they are connected now.
#2-With the key on what voltage is measured at the battery?
I can check that.
#3-Are the tail lights and city lights on?
#4-Does the fuel pump run for 3 seconds when you key on ?
Yes, and the bike runs without other problems than dark display.
#5- If no to #3&4,then your battery is probably done.
Battery might not be completely dead, but slowly dying