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Home Forums 68kMLA SE/30: Capacitor testing but maybe a Memory issue — #1
Post #1 by Elysiom
Source Forum68kMLA
CategoryHardware
Post DateFri, 30 Jan 2009 - 16:43
Original URLhttps://68kmla.org/bb/threads/se-30-capacitor-testing-but-maybe-a-memory-issue.16412/
Post
My SE/30 has close to 20MB of memory installed... yes odd number but it's what System 6 is reporting (fresh install, wiped HD) to my knowledge System 6 didn't have any "virtual memory"

The memory isnt labeld in anyway but I'm guessing the configuration is

4 x 1 MB and 4 x 4MB SIMMS

Sometimes on boot it will display a Simasi pattern... but only some times and if I hit reset enough times it will boot like nothing is wrong which leaves me to believe there may be an issue with the memory

Another issue is that the sound is very low / no startup chime which directly points at a capacitor issue, is there a way to test the caps on the board? It's been a while since I have used an ohmmeter but I believe you check that they don't have an infinite amount of resistance

I did pull the board and I didn't see any leaking electrolytes but that certainly doesn't rule out an issue with caps, the board is actually super clean for it's age

Thanks to every one for your time and sorry if this is a repost

mp.ls