I got my hands on a cocktail table with Missile Command few months ago. The previous owner said the game used to work but unfortunately the game doesn't seem to work for me.
This is the first time I will repair an arcade so I come here maybe to get some tips and wisdom
My overall goal for the repair is not really the look of the arcade (the leg would need a refreshment for example, and there is scratches here and there)., but more the game itself. So the board should run and I want the control to feel good (so some work on the bearing, maybe polishing the trackball).
After running the test mode it seems that I have a problem with the RAM. I have 8 high pitch beeps so it would mean that all the 8 RAM chip are dead.
So the next step for me would be to buy replacement chips. So I'm looking for the chip reference TMS4116-20NL. There is some sellers on internet but the minimum orders are often too high, made for professionals.
I also found this page http://4sale.sbszoo.com/but it seems it's used chip only. I don't really mind the 20$ minimum order if I can get my hands on this RAM chips.
Is anybody have experience buying such chip? Do you have any advice or good addresses?
Do you also know any reason why all the RAM chip would die? I plan to check the voltage, but maybe there is an other problem somewhere?
Anyway, thank you in advance for any help you could provide.