I'm not at all surprised, the LCIII and the MicroQuadras are all lightweights, but the Microquadras are built to support heavier Monitors. My LC475 and Q605 were always happiest with my Apple Portrait Display sittin' on top.
Check the Developer Notes for each machine, they all have a rough logic diagram, listing the interconnections between the various ASICS, the CPU, what is connected to the Fast and Slow System buses and how.
Judging from the paths, lengths and the hot glue holding down the green wires. I'd say they were standard rework wiring for bad traces on that board in particular, or to fix an incorrect PCB layout.
I'd examine that board VERY closely for any verbiage, dates and revision#s you can find. With that much rework, you may have, either a very early production board or maybe even a prototype MoBo on your hands. [
] ]'>BTW, I LOVE your avatar, what's the resistance value?
)