Hi all, I have a Mac II which is booting intermittently. On occasions when it switches on, it will happily continue to do so for the best part of two days but will then go lifeless. leaving it for a few weeks out of the way on the shelf usually reverts it back to operation but its always fleeting.
Its the rev a board with the axial electrolytic capacitors. Batteries are new enough and return the correct voltages when prodded with a multimeter but the caps are still the originals so I'm sourcing replacements. The lead time on one of them is unfortunately very long so it will be a while until I can crack on with that.
One oddity I've noticed is that two don't appear to have ever been fitted, C147 and C144 (see photo). Does anyone know what they do and if I should add them in? Also, will the ones on the video card need doing too?
It has been referenced that these rev a boards don't often have capacitor issues so I'm not so sure thats the issue. I'm hoping its not a power supply problem as the fixes I've seen here for that sort of thing are way beyond my capabilities, but if anyone has any other ideas, i'd love to hear them.
Many thanks
Its the rev a board with the axial electrolytic capacitors. Batteries are new enough and return the correct voltages when prodded with a multimeter but the caps are still the originals so I'm sourcing replacements. The lead time on one of them is unfortunately very long so it will be a while until I can crack on with that.
One oddity I've noticed is that two don't appear to have ever been fitted, C147 and C144 (see photo). Does anyone know what they do and if I should add them in? Also, will the ones on the video card need doing too?
It has been referenced that these rev a boards don't often have capacitor issues so I'm not so sure thats the issue. I'm hoping its not a power supply problem as the fixes I've seen here for that sort of thing are way beyond my capabilities, but if anyone has any other ideas, i'd love to hear them.
Many thanks
