Recent content by pdyholman

Ha - I'd forgotten how straight forward some of these things are on simpler/more elegant operating systems. Thanks, @Qrani ! (My only problem was that I formatted the "new" drive with a new name, which caused some aliases to break, however all OK now)

I've successfully set up a ZuluSCSI RP2040 with a Quadra 650, installing MacOS 7.6.1 and a range of software. However, perhaps I shouldn't have opted for the 500MB default (in Disk Jockey) when creating the original .hda virtual hard disk file, I've started running out of "disk" space ;-)...

An update, After some trial and error, I have a working (cased) Apple Extended II keyboard. The solution (hack) was to cover the area of the case below the keyboard (and the two clips at the top) with insulation tape. A note on how I am transferring software to the Quadra, given...

Hi @mdeverhart - good to know, thanks. The good news is that taking the M3501 keyboard apart (this ifixit was useful), and dusting 30 years of dust, it works. However, it only currently works whilst dismantled (case removed), but not when I put it back in its case (so a tip for...

Progress update: I attempted to burn bootable CDs (finding I had a stack of 50 of them in a drawer) and floppies using Win11 and OSX Macs - but to no avail. Hopefully, I'll be able to renovate the CD drive and floppy drive, but decided it was probably best to do so when I have a working...

> there was a flashing red led to suggest drive activity, but no grinding noises. (I've found a USB floppy drive from an old VAIO and will try and see if (a) I can create a bootable diskette with Disk Tools and (b) the floppy drive works). I was able to spend a few more minutes with the '650...

@Phipli - I need to investigate when I get free time (am in office today). However, there is cause for hope - there was a flashing red le to suggest drive activity, but no grinding noises. (I've found a USB floppy drive from an old VAIO and will try and see if (a) I can create a...

Hi @jmacz Whilst the original power supply wasn't completely dead, a couple of the voltages it generated under light load (shorting pins 9 and 10 so that the PSU powered up the fan) were more than 10% off their expected values. So I suspect that it was on it's last legs (and thus not able to...

Hi @volvo242gt : thanks, that's a really great and generous offer much appreciated! I'm going to experiment some more (disk tools / replacement cable), and I'll see how far I get with the existing drive, but could be useful. (as it happens, I'm visiting California and South Carolina in...

A rainy Easter Monday gave me the opportunity to spend a little time with my '650, starting with a complete dismantling to ensure there wasn't any risk of shorting from any material under the logic board (this youtube video was useful) I successful replaced the C40 capacitor (again youtube was...

Hi @philpli - thanks for this - good tip. Hi @pizzigri - that's very encouraging (and congrats) - where did you source your 22uF caps from in the end (to help reduce the risk of me ordering ones which were slightly too big etc) ?

Hi @Phipli - I appreciate your help. C40 and C39 appear to be labelled "226 20K 329" As it happens, @pizzigri saw their Q650's C40 cap blow last month: https://68kmla.org/bb/index.php?threads/problem-with-quadra-650.43389/#post-472912, and they identified it as a "22uF 20V Tantalum...

As an update, my plan is to move using an ATX PSU, with the help of Phipli and Lee. However, whilst waiting, I thought I would verify that the logic board is at least working, by cutting an ATX Molex from a dead PSU to size and using @Paulie's approach to map wires from another (working)...

Really useful! If anyone is planning to have boards made, I'm happy to buy one or two if it helps reduces your costs !

Hi Everyone, As an update, I took apart the upper chassis, removing all the cables and had a more thorough visual inspection (and dust removal) All looks good. As suggested, I've made a short video of my next test : Added the PSU, pushed rear button - and clicking still present...