famicom hvc-cpu-07 reset problem

hi guys,
i've famicom that i've modded for composite av...i run smb 3 and that's run fine...but if i put other games like ninja kun, king kong 2 it doesn't run it show me gray screen and i've made more try like turn off-on various time and some rarest time games run it...of course smb 3 run it without problem...I've see that if turn on smb 3 the reset button doesn't work.
I've dissoldered and soldered reset buttons but without success...same problem...of course i've see into reset button and show me it's ok...
i don't understand which is cause...and which item on board can be defect...i think that if i solve reset buttons games can be run correctly...
I hope that you can be precious support me...i'm sorry for my bad english...i live in italy but i hope that you understand me.
The board is intact and don't have cut traces...
thank you in advance
see you soon
mike

 

Low active reset. The reset button might not be loading up fast enough. Replace the reset capacitor.

 

Disregard

 

Should be a 47uF capacitor there in close proximity to the reset button. Swap it. If the reset cap begins to fail, the system won't properly initialize.