My 1986 Nintendo stopped working, I had no video at all. After some troubleshooting I realized the copper traces would just lift up from the circuit board when I would try to do a repair. I was looking at a replacement motherboard and Opentendo and NESessity 1.3 were the two I was looking at doing. I picked the NESessity due to the replacement power supply and motherboad, a complete rebuild.

Ordering parts during a pandemic really tried my patience, but I was able to assemble my board. After I installed all the components and powered it on, I had no video at all. Unfortunately I was not able to use the original cpu and ppu and purchased clones from Aliexpress and now could see voltage logic at the two chips, but no clock signal.

No schematic for the NESessity, so I mapped out the clock circuit and recorded voltages and tested with a logic probe that pointed to a failed crystal.After replacing the crystal I recorded new voltages and could now see a clock signal on the trace to the ppu.