68kMLA Classic Interface
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| Click here to select a new forum. | | Mac plus logic board problem | Posted by: Ilcecco on 2025-04-21 14:30:37
Hello!
I have a strange problem with a Mac Plus logic board 820-0174-A and i'm wondering if anybody else had the same issue.
Swapping components with a known good machine i ruled out analog board first, then RAM and ROM. I also replaced the 68k CPU and a couple of LS245 that i had around with no changes.
The problem is that as soon as i turn on i har a sort of infinite bong or maybe a sequence of bong starts, each one for a fraction of seconds that results in a vibrating sound. I did't find anything similar in Dead Mac Scrolls or any other guide.
I'm a little bit stuck and hoping that someone can give me a hint about where look deeper.
Thanks! | Posted by: ilcecco78 on 2025-04-21 15:52:56
I have the same exact sound of this video here : https://68kmla.org/bb/index.php?thr...-board-troubleshooting-help-long-chime.44335/ | | 1 |
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