68kMLA Classic Interface
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| Click here to select a new forum. | | Macintosh Classic II - Strange power up issue | Posted by: javensbukan on 2018-06-05 13:31:00
Hi there!
I've have Classic II in the process of being restored, board has already been recapped and was working flawlessly, was waiting on weather to retro bright the case parts, when I went to turn it on it now has a odd 'delay', where nothing happens for a bit... but some fan noise.
After a while of just running, without a 'bong', or anything on the display, a click or two happens, and some garbage shows up (dimly) on the screen... the computer then eventually starts power cycling with 'bongs' and a weirdly distorted display artifact.
Eventually, it will boot, and seems to work fine, but from a cold boot up, this happens, if it's on for a while and running, I can reboot it / start it up without issue.
I'm thinking capacitors or some other component probably the combo analogue board? Unlike the SE/30 I used to have, the Classics look like they have a integrated power supply / analogue board combo ... but not certain.
Thoughts?
View attachment Classic_II_Boot_issues.MOV
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