death69inc
New member
this one seems to be fun
1st thing running on a test rig pac to jamma harness workgin on 2 other boards just fine
power up all 0's and fruit cycling from other trouble shooting pionts at vrams
replaced all 6 vrams to see if it cured the matter
0's went away now i have random garbage
pulled socketed reincerted all socketed chips nothing has changed
incert abc diag board gets worse garbage and cycling ..sounds in wierd loop with cycle
put orig aux boasrd back on sometime get little garbage and sometime get much garbage
replaced eproms now 0's back
replaced proms nothign changed
ran down traces for vram none are broken from scratches etc
checked voltages coming in +5 was only 4.8 so raised it now 12 is 12.5 dont think that will be an issue
here is what i see so far
two of many garbage screens with aux board installed bars dance other crap moves around
after abc diag board installed game rom
after diagnoistic rom installed
from the picures you can see the diagnostic board is working i can do button tests etc just have no clue what im looking at lol
I have this thread on other sites but no responces
trying to save sendign out for repair
I already have one that needs to go out rather not have to many sent out
1st thing running on a test rig pac to jamma harness workgin on 2 other boards just fine
power up all 0's and fruit cycling from other trouble shooting pionts at vrams
replaced all 6 vrams to see if it cured the matter
0's went away now i have random garbage
pulled socketed reincerted all socketed chips nothing has changed
incert abc diag board gets worse garbage and cycling ..sounds in wierd loop with cycle
put orig aux boasrd back on sometime get little garbage and sometime get much garbage
replaced eproms now 0's back
replaced proms nothign changed
ran down traces for vram none are broken from scratches etc
checked voltages coming in +5 was only 4.8 so raised it now 12 is 12.5 dont think that will be an issue
here is what i see so far
two of many garbage screens with aux board installed bars dance other crap moves around
after abc diag board installed game rom
after diagnoistic rom installed
from the picures you can see the diagnostic board is working i can do button tests etc just have no clue what im looking at lol
I have this thread on other sites but no responces
trying to save sendign out for repair
I already have one that needs to go out rather not have to many sent out