Help with 1942 glitchy PCBs

edelgiud

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Yet another two sets of boards with some issues I'd like to pass by you guys.

The first has some flashing white line background there on right side of ship at beginning of every level. I can tell you that it is a defect on the bottom side board.

The second one has a sort of wave covering the entire graphics which look like wavy lines across the short side of the monitor spaced about 1/4 inch apart. I noticed that unlike the first board, this one is missing all those tantalum capacitors at the edge of the board. I think it's also an original Capcom, but I'm not sure now (the Capcom sticker seem to have fallen off one of the chips on the edge as I see some residue on it). I am having issue attaching iPhone video here right now, only have option to attach pictures, darn, sorry.

Any ideas on where I can start for either case.

Thanks.
 

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Are those lines on the right spaced out lines of player sprites? Check the RAMs on the bottom PCB.
 
Are those lines on the right spaced out lines of player sprites? Check the RAMs on the bottom PCB.
At that point of the beginning of the level, there are no other sprites except the main player plane. And it doesn't look like there are any parts of the ship missing so I'm not sure where it's trying to draw those graphics.
OK, I'll look into little knowledge I have so far of this board if there anre any socketed ram chips at least.
 
Anybody know how I get an iPhone video to attach here? I understand 6MB or less. Is there a particular video mode I should set on my iPhone before recording? When I hit the attach files button below, I don't even even see any of my videos appear in the selectable items. Thanks.
 
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