Dynamite Duke PCB issues

[spoot]

So, working on a PCB of Dynamite Duke and have the following issues.  Some of the fonts are hosed and have lines through them (yes, I know it suppossed to be some of them) and the glove at the intro screen has them too.  Also, in the second pic you can see I'm not getting proper green at all in the "middle" of the screen.  Would be this pointing to a corrupt/lose rom?  I've reset all chips that were socketed, reset the daughterboard and clean the pins with 91% alc.  Also, it does this on multiple monitors.

[lilshawn]

double check your voltages on the chips (should be at least 5.1 to be sure) if it's low, bump it up a bit.

still goofy, youll have to pull the ROMs one at a time and compare them to good images.

still goofy, you have a bad scratch RAM chip.

[spoot]

Hmmmm, I checked at the PS....not the chips....will do.

Don't have a programmer/reader.......but I need to get off ass and buy one one of these days.

Thanks for thoughts.

[lilshawn]

Hmmmm, I checked at the PS....not the chips

yeah, don't do that. you (can) get lots of loss through the power wires/connectors/jamma etc. before the power ever gets to the chips.

ususally on IC's, the power feeds into the pin opposite to pin 1... and the ground feeds the last pin straight down from pin 1.

so if you have a 16 pin chip, power is pin 16 and ground is pin 8

24 pin chip? power is pin 24 and ground is pin 12.

http://wiki.xtronics.com/images/4/4b/Pinout2716.png