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Thanks for all your suggestions. Now having tracked down the problem to the keyboard, I pulled it off and blew it out. The key is functioning correctly (testing with a multimeter), but There must be something else wrong on the keyboard circuit. I did "exercise" it for a while. But when it is...

actually, I'm beginning to wonder if my "control" key is actually not working properly. It does beep when I press control-A but places a faded block cursor at the prompt and then a full coloured rectangle cursor blinking 2 lines above the last line.... Is there any test I can run on my...

The machine seems to be functioning correctly. The strange thing is, I can get the serial card to work booting from an ATDpro floppy and choosing serial. It then communicates with the XP box no problems. That floppy was made on a standard Apple IIe. So the card works in the slot, I just cannot...

I have an Apple IIe enhanced as well as a normal IIe. The duper serial card works in the normal IIe, when I use ADTpro I type: ]IN#2 (in card slot 2) ] (ctrl -A) and I get to the SSC: command prompt. Everything works well. However, if I place the same card into the enhanced IIe model and...

...well, I swapped out the CR5 and Q2 from the now "donor" MacPlus. It started with a chime :-/ , then disk drive access :?: , then the smell of hot electronics 8-o , and tripped my mains voltage earth leakage switch xx( . I think I have tow donor Macs now and I'l go on the hunt for a...

Thanks for pointing me in the right direction. The rectifier CR5 seems fine, I should replace it but I can't find a supplier in Australia for them. Although it is listed on the schematics as a GI854, the actual diode on my board is a GI824. The soldier points around Q3 (labeled Q2 on my board)...

Damian, I'm not sure what you are referring to by "barrel" rectifier. I have gone through the 1N4007 diodes in the little bridge rectifier but they seem fine. I guess I'm going to be working my way through the board component by component... cheers, Wayne

Thanks Damian, I had actually been given 2 Mac Plus's, both were not working when I got them. However, one of them has obviously been on a workbench many times with poor re-soldering of some parts on the board(don't hold much hope for that one). But this "chirping" machine looks very clean on...

Hi, I have been given a Mac Plus 1Mb however it does not power up. I have checked visually the components on the boards, there do not appear to be any blown caps, I have unplugged and re-plugged all connectors. When I turn it on, it makes a "chirping" noise. Am I assuming correctly that this is...