Hello All,
I've got a couple issues with this NES I'm trying to track down. First is garbled video. There are frequently chunks missing from sprites and sometimes sprites are missing all together. For example in the video below, half pills and half viruses appear when trying to play Dr. Mario. This happens on any video output, composite, HDMI (yes, I'm installing a hi-def NES to complicate the matter). I've tried several different pin connectors from known good NESs. I've even tried with a Blinking light win but nothing resolves the video problems. I've continuity tested the pins on the edge connector on the motherboard to the next via or connection point. I've also continuity tested the pins of the PPU and CPU the same way.
The other issue I'm having is specifically through HDMI on the Hi-Def NES output. The image scrolls to the left over and over. The Hi-Def NES configuration menu is rock solid in the center of the screen like it should be, but the NES images still scroll behind it. This started after I replaced the caps in the video amp/power module to see if they were perhaps the culprit of the above garbage video issue (not the cause apparently). I've tested through the old composite video and the scrolling doesn't exist.
https://youtu.be/HXKywZcRmb0
As always, any insight/assistance is greatly appreciated.
I've got a couple issues with this NES I'm trying to track down. First is garbled video. There are frequently chunks missing from sprites and sometimes sprites are missing all together. For example in the video below, half pills and half viruses appear when trying to play Dr. Mario. This happens on any video output, composite, HDMI (yes, I'm installing a hi-def NES to complicate the matter). I've tried several different pin connectors from known good NESs. I've even tried with a Blinking light win but nothing resolves the video problems. I've continuity tested the pins on the edge connector on the motherboard to the next via or connection point. I've also continuity tested the pins of the PPU and CPU the same way.
The other issue I'm having is specifically through HDMI on the Hi-Def NES output. The image scrolls to the left over and over. The Hi-Def NES configuration menu is rock solid in the center of the screen like it should be, but the NES images still scroll behind it. This started after I replaced the caps in the video amp/power module to see if they were perhaps the culprit of the above garbage video issue (not the cause apparently). I've tested through the old composite video and the scrolling doesn't exist.
https://youtu.be/HXKywZcRmb0
As always, any insight/assistance is greatly appreciated.