NUS-CPU(P) 01 fail to boot a game

[N74]

Hi,

I try to repair a PAL N64. Was in working order last time I see it...

I've try a lot of things :
Clean everything into the console.
Check that the cartridge port is connected to RCP, CPU and PIF (Thank you Beta for your drawing!).
Check that nothing is short (CPU, RCP, RAM).
Check 3.3V, 12V.
Check Jump pack, power supply, av cable, cartridge in another N64 : work.
Check reset button is not stuck.
Reflow power and av port.
Try power on without game : RCP, CPU not hot, RAM little hot.

I have no idea what I can check ?

Any advice?

Thank you.

 

[N74]

No short between NUS-PIF and reset switch.

Any advice?