68kMLA Classic Interface
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| Replace logic board - Mactest result after recapping mac iici. | |
| Posted by: crazyben on 2023-09-10 15:43:23 when I connect the monitor to video card instead on on board video port that error went away. And the test result is same Bank B ram error. | |
Posted by: crazyben on 2023-09-10 15:44:27 | |
| Posted by: joshc on 2023-09-10 15:54:22 @crazyben Is that after removing the SIMMs that were in Bank B? I guess not as it sounds like that bank is failing still. Have you tried with the larger SIMMs in Bank A only? The only thing you can do here is swap them between banks until you get no errors - but it's possible there are issues with both banks. 30 pin SIMMs are not that expensive, and you can still buy them from a variety of sellers. | |
Posted by: Phipli on 2023-09-10 15:55:55Have you tried with the larger SIMMs in Bank A only?I think they only have 1MB SIMMs. | |
Posted by: Phipli on 2023-09-10 15:56:45The only thing you can do here is swap them between banks until you get no errors - but it's possible there are issues with both banks.Hold up, we've already swapped them and a fault remained in Bank B. Might not be the SIMMs. | |
| Posted by: joshc on 2023-09-10 15:59:10 Heh...hard doing this over a forum. Easy to talk about the same thing in two different ways. Larger as in... physically slightly taller / more chips on it. He seems to have two variations of SIMM. Has he swapped them? I don't see a post where he says he's tested with Bank A only, he just posted a diagnostic again that shows an error with Bank '2' which I assume is what Snooper shows when it means Bank B. But yes, other things can cause bus errors. | |
Posted by: Phipli on 2023-09-10 16:00:33Has he swapped them? I don't see a post where he says he's tested with Bank A only, he just posted a diagnostic again that shows an error with Bank '2' which I assume is what Snooper shows when it means Bank B.Fair point. I forgot that sometimes people don't actually do what you said. | |
| Posted by: crazyben on 2023-09-10 16:03:25 Sorry I was not clear. After swapping the RAM to Bank B still gave error. | |
Posted by: Phipli on 2023-09-10 16:06:22Sorry I was not clear. After swapping the RAM to Bank B still gave error.Excellent, now it's important to know what happens with nothing in bank B. This tells us if it is just testing Bank B first, and you have a more global issue. | |
| Posted by: crazyben on 2023-09-10 16:19:48 With nothing on bank B get this error. | |
Posted by: Phipli on 2023-09-10 16:23:24With nothing on bank B get this error.I suspect you have a more general logic board fault. Sorry, but it will be a nightmare to find. This type of fault that doesn't stop the machine from working is really hard to locate. The only vague and unhelpful advice would be, it probably isn't the data bus, but it may be related to the address bus. | |
| Posted by: crazyben on 2023-09-10 16:25:11 Okay. I will keep and eye out for iici board. I will use this until it stops working. Thank you for your help on this. | |
Posted by: Phipli on 2023-09-10 16:27:48Okay. I will keep and eye out for iici board. I will use this until it stops working. Thank you for your help on this.Oh, one last thing, do you have any cards in the machine? Pull them out. All nubus and cache cards. | |
| Posted by: crazyben on 2023-09-10 19:52:52 Took out all the cards and reran the test. And still getting bus error with no RAM in bank B. | |
| Posted by: joshc on 2023-09-11 01:10:08 | |
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