NES PPU problem

You can't disable an 7404 chip. Cutting the power pins won't disable it.

Remove the original chip completely and connect the new ones using wires... I recommend you get a DIP chip though.


Just like Calpis said.

 

well DIP chips are much more expensive then the other ones, so il just connect it using wires.

 

Sorry for the jack...but I have a similar issue, with no other similes on the net. One of my NES's plays SMB1 perfectly, but it is missing sprites for MegaMan 2&3 and SMB freezes as soon as the title screen ends and the game board begins. Not an analog circuit problem or lockout problem like 99% of other issues on the net. Also no chips are hot, and I cant find any cold solder joints. This NES holds sentimental value (I have had it since I was 6 Years old).:banghead:

 

Good news everyone after a long search i got a nice 74HCU04N replacement. DIP chip and everything

http://pt.farnell.com/texas-instruments/sn74hcu04n/ic-hex-inverter-pdip14-7v/dp/1287555

and il be getting it next week so untill then wish me luck

 

It sure "feels" like there's a WRAM problem (6116 chip which is used by CPU as work RAM)...

 

my 74HCU04N has just arrived im starting the replacment process now, il give news.

EDIT: YAY IT WORKS, Finally i have my NES back I would like to thank all of you who helped me you cant imagine how greatfull i am and i cant say this enough but THANK YOU, THANK YOU, and THANK YOU.