electricmonk
Active member
Hi all,
I've been fiddling around with this Mac Classic to try to bring it back to life. I washed the motherboard and it started working again so I figured recapping the MB was the next step. So the other day I finally found some time and I recapped the MB. All was working well, it's got some goofy golf game on there from the previous owner, good times.
The image on the screen was shuddering in time with hard drive access though so I figured I should recap the analog board - although now I kind of wish I hadn't, as will be explained later. I decided to replace the following as recommended by this page http://www.maccaps.com/MacCaps/Capacitor_Reference/Entries/1990/10/15_Macintosh_Classic_Analog_Board.html
CP2
CP6
CP7
CP8
CP9
CP10
CP12
CP36
All of the above had leaked so I cleaned off the residue underneath once they were removed with isopropyl alcohol.
I also replaced CP11 because there was gunk around it like it had leaked.
So I replaced all those, and now there is no sound and the screen still flickers. Then the hard drive stopped being recognised. I read somewhere that it's good to adjust the voltage after replacing AB caps so I did that. The 5v rail gave 4.79 so I adjusted the trimpot to 5V and the hard drive spun up again. Still no sound though, and now the hard drive has stopped being recognised again.
Any thoughts on the next step? Thanks for your time.
I've been fiddling around with this Mac Classic to try to bring it back to life. I washed the motherboard and it started working again so I figured recapping the MB was the next step. So the other day I finally found some time and I recapped the MB. All was working well, it's got some goofy golf game on there from the previous owner, good times.
The image on the screen was shuddering in time with hard drive access though so I figured I should recap the analog board - although now I kind of wish I hadn't, as will be explained later. I decided to replace the following as recommended by this page http://www.maccaps.com/MacCaps/Capacitor_Reference/Entries/1990/10/15_Macintosh_Classic_Analog_Board.html
CP2
CP6
CP7
CP8
CP9
CP10
CP12
CP36
All of the above had leaked so I cleaned off the residue underneath once they were removed with isopropyl alcohol.
I also replaced CP11 because there was gunk around it like it had leaked.
So I replaced all those, and now there is no sound and the screen still flickers. Then the hard drive stopped being recognised. I read somewhere that it's good to adjust the voltage after replacing AB caps so I did that. The 5v rail gave 4.79 so I adjusted the trimpot to 5V and the hard drive spun up again. Still no sound though, and now the hard drive has stopped being recognised again.
Any thoughts on the next step? Thanks for your time.