Dipper184 Posted October 28, 2018 Report Share Posted October 28, 2018 Today I powered on my Mac Plus and I heard really weak start up beep and there was this weird pattern on screen for a few seconds, then the missing disk screen showed up and it booted into a system as usual, except there was no sound. Second time I powered on the Mac there was no sound (not even quiet beep), also there wasn't any audio output from the audio jack on the back. Quote Link to post Share on other sites
bibilit Posted October 29, 2018 Report Share Posted October 29, 2018 Troubleshoot ram and voltage outputs first. Quote Link to post Share on other sites
Dipper184 Posted October 29, 2018 Author Report Share Posted October 29, 2018 4 hours ago, bibilit said: Troubleshoot ram and voltage outputs first. I don't know how to do it, also I don't have the equipment... Quote Link to post Share on other sites
bibilit Posted October 29, 2018 Report Share Posted October 29, 2018 Checking Ram is easy, but you need another set to swap aound. A cheap Multimeter is all you need to check voltages. https://www.classic-computers.org.nz/blog/2015-05-14-mac-plus-checkerboard.htm Quote Link to post Share on other sites
Dipper184 Posted November 10, 2018 Author Report Share Posted November 10, 2018 On 10/29/2018 at 2:24 PM, bibilit said: Checking Ram is easy, but you need another set to swap aound. A cheap Multimeter is all you need to check voltages. https://www.classic-computers.org.nz/blog/2015-05-14-mac-plus-checkerboard.htm I know this reply is late because I didn't the have time to do this. I skipped the RAM and voltage test and checked the solder joints on J4 and some were cracked. I re-soldered them, it didn't help, but upon seeing the checkerboard I heard screech, second time I powered on the mac there was no sound. Quote Link to post Share on other sites
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