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See the thread “krb5kdc + Wrong OS Time + Losing Wifi Password ... | Official Apple Support Communities”, at https://discussions.apple.com/thread/239...
Before you remove the old battery and install the new one, make sure that you go in the System Preferences / Date and Time and have them set to "manual" (i.e. check off "Set date and time automatically" to an Apple server). That could save you lots of hassle when rebooting after replacing the battery.
After getting the display off, I tried to glue the broken hinge - it was broken at the outer corner of the PowerBook (the break had actually wrenched the case open at the corner) and just beside the hinge itself on the inner side by the display cable. Tried twice but no luck, the forces seem too great and the glue joints just break again. So the advice given on this site is correct; about the only thing you can do is buy a new display. However, when I reassembled it I left the back clutch cover off - at least I can open and close the display now if I am really careful...
On my machine, the screw on the right was silver and held down a little clamp which came off together with the screw.
The little silver screw on the left has a little 4mm hex nut under it. This, in turn is held to the PC card cage (step 32) by another nut accessed from the touchpad side of the PowerBook. The screw wouldn't come out without me holding this nut - which then came out together with the screw. After this I found another nut on the table and wondered where it came from! But it became clear when reassembling the computer, as you have to put the PC card cage back first and need to use both nuts at that time to secure the side of the cage toward the back of the computer. Apparently I must have inadvertently loosened the lower connection on the 4mm nut, as it was meant to come off only later...
The Torx screw on the right can be hard to reach (and put back). To get it back, I pushed my Torx wrench through a piece of double sided tape (used for laying carpet), which left a little dot of adhesive on the tip of the wrench that held the screw while performing the contortions to put the screw back in place...