DK jr PCB issues

vicemikey

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Ok - so the DK Jr I picked up last Friday has a reset/graphics I don't know issue - I'm in the process of cleaning the board and resetting the chips right now, but I'm doubtful that it will do anything.

You fire up the game and it makes the bleep bloops then - it flashes between donkey kong in the cage and then little blue twinkle stars, like 2 frames back and forth - DK in cage / blue sparky guys / DK in cabe / blue sparky guys.

Any ideas off the top of your head? I've looked at a troubleshooting page without a match for the issues I'm having. There's a stuff on these boards. wow.
 
About any of us common folk can do is reseat chips and/or clean their legs if needed OR feel the chips. If one or a few appear hotter than the others hit them with freeze spray (canned air) and if the graphics clean up you have your culprit.

Also - for good measure ensure you have a solid +5VDC being produced.
 
You fire up the game and it makes the bleep bloops then - it flashes between donkey kong in the cage and then little blue twinkle stars, like 2 frames back and forth - DK in cage / blue sparky guys / DK in cabe / blue sparky guys.

The watchdog is reseting. If reseating the program ROMs doesn't help it's prob an addressing problem with the main program ROM or RAM.
 
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The watchdog is reseting. If reseating the program ROMs doesn't help it's prob an addressing problem with the main program ROM or RAM.

Awesome, that really narrows it down, I will mess with it tonight. Hopefully I get her working. Not afraid to solder new ram chips, but I don't have a source if I have bad roms. Someone on here can probably sell me some. :)
 
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