Do you have a picture of the problem? If the ram chips are all BGA, then it gets complicated very quickly. If they have exposed pins, I would start with something easy like replacing them memory. You would only need to buy one replacement and then shift each chip one position over until you get to the last one or the problem goes away.
Reflowing BGA components has a very high rate of failure. I have a different pile of cards with known memory defects that I plan to repair at a later time. To to BGA repair, I want to get a pre-heater, which I don't have at the moment. The ground planes on graphics cards suck up a lot of heat and this makes rework difficult for some repairs. If you've ever had a capacitor that just wouldn't come out, that would be because of the ground plane sucking up all the heat.
TrashPanda wrote on 2022-03-12, 08:23:
...that pile looks like it needs an electronics store STAT !
At this point I'm also somewhat of a small electronics store with all of this stock. I don't have any inductors though! I expand my inventory as I encounter new things to repair.
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