DOS/Win98 build with Asus P3B-F part 2.9, re-repairing the mobo (IRQ issues with ISA sound cards)

I'm having different IRQ related issues with two ISA sound cards and failed floppy drive with one sound card. I suspect the motherboard and there is a short somewhere. 00:00 Does fixed slotket/socket survive CPU change? 06:46 What is wrong with the motherboard? 12:52 Another (broken) Asus P3B-F 16:03 Unpopulated capacitors 25:14 ISA slot desoldered 28:14 Inspecting the I/O controller 31:23 Need to solder ISA slot back 39:59 Final testing