68kMLA Classic Interface

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Original Classic crashes on playing the sound
Posted by: CharlieFrown on 2020-08-03 16:25:28
Hi, 

Luckily this one never had a leaky battery. Boots just fine, but never heard any sound from it. When I click play sound in System 7 Control Panel it crashes. Cleaned the board with IPA, especially around sound chip, put headphone jack back and forth. No progress. I am planning to recap the board, but I guess there's something else going wrong?  

Posted by: desiv on 2020-08-05 07:40:35
Have you booted from a floppy or to the ROM (Command-Option-X-O on boot) and tried the sound?  Just to make sure it's not a software glitch?

Otherwise, cleaning/recap seems to be a good step...

Posted by: CharlieFrown on 2020-08-05 16:11:00
ok thanks for reply. Need to check this while booted from Floppy/ROM. 

Posted by: CharlieFrown on 2020-08-20 05:14:58
here's update: recapping the logic board worked magic and eliminated all these problems:

- no sound

- sudden slowdowns, when computer would stall and wait before completing tasks

- hard drive inaccessibility - quite often the hdd wasn't present at booting

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