Donkey Kong 6P & 6R RAM error

[CDROM]

I have a that has a 2 board set.  It also has a braze high score save kit installed.  When I boot up the CAB it gives me the following error on the Braze bootup screen.

6P: BAD 22
6R: BAD

Other than that the game plays fine and I have all the character sprites.  The only thing I see on screen that is messed up are some of the beam platforms on the first level have small black cracks in them.  All the sounds in the game work fine.

Pulled the boards and looked at the video board at intersection 6P/6R and noticed they are both D2148H-3 ram chips by intel soldered in.

How do I go about pursuing the ram issue?  This is my first arcade machine and I come from the world of IT help desk troubleshooting.  Could my ram issue be upstream from the actual 6P/6R chips?  I just find it hard to believe both these RAM chips perished at the same time.  My last question is, where do I even buy a D2148H-3 chip?   I don't feel I can go into a RadioShack parlour and they have it on the shelf type of thing. 

[P-feif]

Well this is just a guess but sometimes a good guess fixes the problem. First even though those chips are soldered in I would reseat any socketed chips and clean the legs with a pensile eraser. If you see any corrosion then maybe spray the sockets with some electronics cleaner. Then I would reflow (touch up) the solder joints for the two chips that you are getting the errors for and probably closely inspect the rest of the board for cold solder joints and touch them up too, along with any header pins and such. Recently my space invaders died and that was how I got it running again.