68kMLA Classic Interface

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SE RAM with battery bomb damage
Posted by: Chuckdubuque on 2023-05-26 14:53:08 Newbie question here. Got a pretty badly battery bombed Mac SE and trying to salvage what I can. One of the RAM SIMMs was hit with battery juice to the point that the gold pin is now green (no gold). I assume this chip will probably be toast? Any danger trying to use it in a known good machine to verify its deadness?
Posted by: Cam on 2023-05-26 15:43:42 Probably best if you post a picture of the board showing the damage.
Posted by: Phipli on 2023-05-26 15:52:38 More generally, 1MB SIMMs are fairly readily available so it can be easily replaced at pretty low cost.
Posted by: Chuckdubuque on 2023-05-26 16:07:00
Posted by: Chuckdubuque on 2023-05-26 16:11:43 Far left pin on this side has the damage.
Posted by: Chuckdubuque on 2023-05-26 17:07:53 Front pins all look fine
Posted by: Byrd on 2023-05-26 17:54:47 ... time to get scraping! Should be OK assuming this was the only area of corrosion.
Posted by: Chuckdubuque on 2023-05-26 17:56:34 ... time to get scraping! Should be OK assuming this was the only area of corrosion. So, scrape to see if there is any metal underneath? I am very new at this, so pretend you are talking to a complete idiot 🙂
Posted by: Byrd on 2023-05-26 18:50:28 Yes, scrape it off with the end of a flat head screwdriver, don’t go too hard. Same screwdriver end wrapped with a small piece of fine sandpaper might also help. Also check the RAM slot itself for any corrosion. Long term I’d replace the stick.
Posted by: robin-fo on 2023-05-26 23:17:56 Newbie question here. Got a pretty badly battery bombed Mac SE and trying to salvage what I can. Don‘t scrap the rest! Someone might still be able to build a replica board using some of the components (BBU, SWIM, etc).
Posted by: Cam on 2023-05-27 08:03:44 That vertical trace on the left looks a little suspect. If you have a multimeter I'd check it for continuity. Probably clean/tin the two pads on the left as well.
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