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It works again. After putting the transistor back in Q3/2, refloweing the J4 joints and one of W6 that looked odd, the CRT is back to live. Thanks all for sharing your thoughts!

I recapped the analog board of a Mac 512. All worked fine. After it was stored for a couple of months, I started the Mac again But this time, the CRT would not turn on. There was a solid boot chime/beep though. Voltage on the 5V and 12V/-12V rails were normal. Troubleshooting done so far: -...

This may be a another trivial one: Did you try to turn it on with a different keyboard and ADB cable?

thanks, that was very helpful.

Yeah, these had minor corrosion, thanks for pointing them out. But they were not yet broken. Any other ideas how to resolve the power issue?

This IIcx loops from on to off as soon as a known working (and recapped) PSU is connected to mains. The loop cycle goes a brief moment in "on" mode, then to off, then on again, etc.. No peripherals were connected to the board while powered on. What I have done so far: - Recapped logic board...

Thanks, it was UE13 in my case. Chip was replaced and the IIci powers up normally.

@gagigu Does your Classic II still need a recap? I would still have capacity in June and live near Zurich. PM me if needed.

I checked continuity of the switch's pins. Switch off position: Continuity from pins 1A to 2A & 1B to 2B Switch on position: Continuity from pins 2A to 3A & 2B to 3B Does this make sense?

I have a IIci that powers-up a moment after it's connected to power. It boots normally but when it' supposed to shutdown, it reboots. What I have done so far: - recapped logic board - recapped PSU - checked each cap for continuity and correct polarity/capacitance/voltage - measured voltages on...

I just got an unopened kit of the "Micro Courier" for Apple ///. Unfortunately, the two floppy disks seem to have issues, so I can't start the program. Two questions: - Does anyone have disk images of "Micro Courier"? - Which program would you recommend to fix defective floppy disks...

Does anyone have a link to this file? VIMAGEPCCARD11.sit.hqx - I believe it's for this PC Card: I noticed this thread here but could not find it in the archives mentioned there: https://68kmla.org/bb/index.php?threads/interware-device-software.32951/page-2#post-398670

The SE/30 now boots nicely. Not sure if reseating the insulation foil was really the solution. It was seated before. Anyway, thanks for the guidance!

Yes, idle = nothing connected. Thanks for pointing out the missing isolation foil. Adding it didn't change the voltage on the -12 rail. Any other ideas what is going wrong? I should mention that the PSU was working fine before the recap.

After the recap of a Sony PSU for my SE/30, the Mac won't start-up (no chime, no fan). The analog board is known working. Here are the readings from the idle PSU: I wonder why the -12V is so low. Any thoughts on that? Would adjusting "VADJ" at position 251 correct that or just increase it for...

Samw issue with my GE PSU.

The link above seems to be broken.

Thank you!

Is there a 3d printing file available for the plastic lock at the bottom of the PSU's for the logic board power plug like this one?

thanks all for the insights.