[WTB] sick or dead s9, t9, or r4 board for reverse engineering

[cableiso]

I'd like to trace out the s9 circuit, and to do it I need to desolder a couple of chips and trace the wiring.  The object is to build a smaller, quieter hobby miner.

I'd like to buy a sick or dead board from s9, t9, or r4.  I intend to reassemble it, but can't promise anything.

[cableiso]

If anyone has dead r4 boards they would probably be the best candidate