A1200 diskdrive strange behaviour

[apa]

Hi all!
I recently got an spare A1200 KS3.1 in a tower from a friend. It has been collecting dust for a couple of years. No floppydrive with it. Luckily i have an spare Amiga floppydrive!. Testing it and...
the Floppydrive is acting strange, (and it's not the floppydrive it self -  The floppydrive works fine when tested in my other A1200)

Here's the Symptoms:
 
*The drive tries to start reading for half a second, but then it stops - repeat ad infinitum. The purple boot screen disappears for a half a second, and then it's back, and then it tries again.
*Drive DF0 is found in the boot menu, even if not connected
*The mouse and keyboard works fine, and so does booting from an external DF1, after choosing that from the Boot menu.
*The Amiga always waits the 30 sec at startup/reset before trying to start to boot from floppy, or showing boot menu.

The mobo only have the most basic things connected, PSU, mouse, video, sound, keyboard.

One thing i noticed is there a soldered wire on the backside of the floppy input on the motherboard, (See attachment) what's this for? Did someone hack on this motherboard..
It's a rev 1.4.d btw.

Some mobochips that might be broken?

EDIT: Found THIS
info from SPS. This looks like it could be the problem. Will go and buy an soldering station and change this according to the link.

[tribz]

Not sure about the rest but I'm pretty sure KS3.1 has a very long boot delay if theres nothing connected to the IDE port, 30 seconds sounds about right.

[runequester]

3.1 does have a long delay, it was to help slower hard drives spin up as the amiga would boot too fast.