A4000 doesn't recognize AGA properly!

[Oldsmobile_Mike]

1. In Early Startup Control there is no option called "Best Available". Only "Original" and "Enhanced".

Semi-related question, does C:SetPatch execute before the Early Startup Control screen is loaded?  Seems odd that this would be the case, but I recall that when I was trying to get the "Nessie" easter egg to display it would only show up on the Early Startup screen if you have 3.9 installed, not 3.1 (even though the ROM is identical).

[Oldsmobile_Mike]

As previous owner of this Amiga told me this is a replacement battery of the old one. Do you see a leak on the photo? Because it seems that it's present.

That looks like hot glue.  Poke it with your finger, it should be hard.  Of course it may also be hiding whatever damage might have occurred from the previous "barrel" type battery that was installed prior to the modification...