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PC 1512 - error: faulty system ram

Started by trolleymaster, 12:36, 30 December 21

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Hi folks
hoping someone can assist

I've acquired an Amstrad PC1512 which starts up but then displays :

error: faulty system ram

So I have put new sockets in and replaced all the ram chips suspecting one or more to be faulty, but still get the error.
I was very careful to ensure that I used the same type of chip 41256-15

Can anyone offer the next thing to try ?

Thanks in advance !


Is LK4 set correctly? I can't recall if it is soldered or jumpered, but is used to select 512K or 640K.

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