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Thanks for all your suggestions regarding the drive - I had the faint hope that drive would do the job, but maybe it is worth looking into the scsi2sd. The keyboard is a Datadesk Mac 101. I'm not too knowledgable about keyboards, but It is actually quite nice to type on. And the key switches

Hi Nathanplus, thanks for your reply. I have scanned the drive using Lido, and it does come up with bad sectors and it also fails to reassign them, which suggests a deeper issue.  Formatting and initializing the drive using Lido completes successfully, but I get the same issue when trying to...

To give a final (maybe) update on my Mac Plus - I'm happy to say that with the great help of cheesestraws providing boot disks, as well as a new floppy gear from Italy, it's now running nicely! With the help of a raspberry pi 'round the back, allowing me to use a standard USB mouse: The...

That would be wonderful - Thanks again! It was running system 6.0.8, and seeing as the machine only has 2.5 MB of RAM, System 7 would probably be a stretch anyway. My hope is that having the boot disk will allow me to see if the SCSI drive is mountable - then I can go from there. 

In an effort to archive the files of the SCSI drive, I connected it up to my G4. This worked well and I was able to copy over all the files. However, connecting it back to Mac Plus resulted in a boot failure - I just get a solid floppy.  It seems like connecting it up to the G4 running OS9 has...

So the machine is up and running nicely. Managed to build a mouse using the Raspberry Pi and the code here (https://hackaday.com/2017/01/23/bring-a-modern-mouse-to-an-atari-st/). I'd quite like to upgrade to System 7 on the SCSI. What's the best way of going about getting System 7 installed on...

It did indeed have an operating system on it, so I should be good to go without a boot floppy.  Thanks again for the offer. If the hard drive gives up the ghost, I may come running. That device looks perfect - great build. I'll have a rummage around to see if I have one of those joysticks.

It lives!.... I finally got the damn thing to boot.  Switching around and/or cleaning the RAM chips seemed to do the trick in the end. The hard drive seems to function well. Now all I need to do is find a mouse - I'm thinking I might DIY something like...

WIll do.  I actually had some luck with the SCSI hard drive this evening - after taking off the enclosure, it magically started spinning.  Starting up the HD followed by the Plus lead to a Happy Mac... wonderful! Of course - the story isn't over yet. The Plus starts to boot, I hear plenty of...

Sounds great. Let me know when you're ready and I can message you my address. Thanks again!

That would be fantastic! Please, whenever you have time. More than happy to cover postage. I'm not too sure about operating system - System 7 should work well on this machine right?

Thanks for your reply.  Yes, it seems like making my own boot disk wouldn't be possible since the Plus is the only machine I have (besides a PowerMac G4). I'm in the UK at the moment. 

To update on this problem: It seems like it was the ROM.  Not having my own EEPROM programmer, I built one with an Arduino following this great tutorial (see youtube link below).  Reading the ROMs revealed som flipped bits on the 3420342a LO-ROM.  Using the ROM images found here...

Still no luck with the Mac Plus - bong, bong, bong. I have gone over the AB again, reflowing everything that looks suspect. Voltages still look good at the floppy port. I don't really have the kit to go poking around on the LB, but this may be what is necessary for this machine.  There are a...

The sound I am hearing is not a ticking, just a the bong over and over again.  I have reflowed J1 with fresh solder and cleaned the contacts. Still the same issue.  The issue seems similar to that mentioned here - where 'The problems was the two ROMs on the logic board and the JFET Q5 on the...

Thanks for your responses. dochilli -  No access to an oscilloscope, unfortunately.  Regarding the buttons, pressing the interrupt has no effect on the repeated bong. The reset button stops the bongs during the press, but they restart as soon I let go of the button.  Thanks

Just to update on this: Removing, cleaning, and reseating the RAM had no effect on the boot chime loop. Voltages are still stable at the Floppy output. Any ideas much appreciated. 

Thanks for the response.  I checked the output at the external floppy (as detailed here https://www.classic-computers.org.nz/blog/2015-05-14-mac-plus-checkerboard.htm ) and I got a stable 12.3 V on pins 7,8 and 5 V on pin 6.  Does this point the finger at the logic board (SIMM possibly)? Thanks

Thanks for your reply on this. Finally getting around to having a look at the machine.  After taking off the analog board, it looks in pretty good shape to me. Are there any areas that I should focus on?

I have recently acquired a Macintosh Plus 1Mb. Unfortunately, after switching the machine on I hear the normal boot chime but it repeats endlessly and the screen remains blank.  Any help on diagnosing this would be fantastic.  Thanks in advance