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ChipMusic.org / Forums / Posts by sirhcman
nitro2k01 wrote:If you have continuity between the pad and and via near the CPU, how could the trace between under the cartridge slot be broken?
You may want to use this btw:
http://blog.gg8.se/wordpress/2013/01/28 … lcome-rom/
It can be used to check the buttons if you want to experiment with things. It also plays notes (a different one for each button) so you don't have to have access to the screen to use it.
No I meant I checked the trace that is right below the cpu. I just tested the trace that runs behind the cartridge slot and it is indeed the culprit. Now I just need to rig a wire from one side of the board to the other. Thanks so much for helping me troubleshoot the problem! 
Thanks for the help nitro, I had previously tested for continuity on the left pad of the down button and the top most point on the same side as you mentioned and I have continuity. I also tested the trace on the "back" photo you posted and the trace on the "front" photo coming off the cpu and both are good. I guess the only other trace I haven't tried is the one behind the cartridge slot and I just cant imagine there being an issue with that but without testing it I can't say for sure. I tested the ground to another ground point and had continuity...
I really appreciate all the help!!
Teh D3th St4r wrote:I got nothin' man.
Talk to Nitro about it. He's a little condescending, but he's usually right.
I appreciate all the help, hopefully someone else can provide more insight. I would hate to have to chuck this thing because the dpad won't work properly!
Teh D3th St4r wrote:Denatured Alcohol.
I'm going over some schematics to see if something might be burned out or if the gameboy is just bricked.
Thanks for the help! If you find anything please let me know.. I should mention that the power jack doesnt work (I haven't even messed with diagnosing the problem on that, been using batteries to test it) but I don't know if that would have any effect on the down on the d-pad.
Thanks for the response, I already cleaned the contacts with a q-tip and isopropyl alcohol and even tried other silicone parts that are known to work and it still won't register the down on the D Pad. I am really stumped!
Pardon my ignorance but what is "DNA"?
Posted this over on DP but thought I might get better help over here...I have been fixing up a Gameboy Color that had some battery corrosion and sound issues... I was able to get the sound problem fixed and cleaned up the corrosion and got everything running however I am having an issue with the down button on the D pad not working. I don't believe it is related to the corrosion issues because that seemed to be isolated to the other side of the board. I cleaned the rubber switch and plastic d pad and the contacts on the board look good. I tested the traces for the down direction with a multimeter and it has continuity. All the other directions work fine (UP/LEFT/RIGHT) the B/A/Start/Select buttons all work too. I am at my wits end at this point, does anyone have any suggestions?
Any help or input is appreciated!
Posts found: 6
ChipMusic.org / Forums / Posts by sirhcman