duo trouble

[liquidw]

Hi!
I'm hoping someone has seen this problem before. I recently installed a duo chip in a PS2 ver 4. With the chip activated I cannot boot any games at all, back up or original. With the chip disabled the PS2 boots as normal. I installed the chip next to the ground pad, ran 20-22 awg wire for power and 30 awg for the other wires. I also have ohmed out the wires looking for faulty connections and shorts. Is there any way I can check to determine if it’s the chip or the wiring that is at fault? Any advice/help would be greatly appreciated.
Thanks in advance.(and thanks for all the helpful advice on this board!)