slongbons

I ended up not doing the back drilling. I resoldered a bunch of the pads and the video seems cleaner. Oddly, when playing from ROM the video only looks crappy when there is a cartridge plugged in. With no cartridge the ROM menu and games look perfect. Thanks for the tips on cutting the slot. I mangled the hole a bit though. I tried to make the hole using a drill, snips, and a utility knife - not pretty. I should have just gone out and bought a dremel. It won't win a beauty contest, but it works. My cart connector is mounted really solidly at least.

I like that back tapping idea. I might start over and do it that way. My wire routing is a mess right now. Were you able to drill the holes using a standard drill or did you use a dremel? I was concerned that my wires were too long, but they are less than 7 inches. I must have blob soldered something. I was hoping someone might be able to tell me if there are particular pads that are more likely to cause display issues when soldered poorly. Kokovec mentions the GND pads.

Hi All, I just finished my first FB2 cart mod. I managed to get it to work without too much trouble thanks the tutorials on this forum. But I am noticing some video issues similar to what Kokovec mentions. I see some sprite ghosting and video noise that was not present before the mod. It's really noticable on Chopper Command and Kaboom. The video noise is present when I use carts and also when I load games from the internal ROM. Also, the ROM menu screens are slightly shifted horizontally to the left. The system is definitely still playable but it is a little annoying. My questions: Has anyone cured the video noise problem? Did I possibly screw up the display when I was doing the mod? Any suggestions for a fix? I'm pretty sure I have a Rev C board, see the photo below. Thanks.