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Bad sound like @David Cook and myself, actually. We both have 5126 machines which produce a "tick" sound every 10 seconds. I call that "bad sound." David explains the reason for the tick anomaly here: Apple patched the sound watch code to keep sound power enabled with a check every 10...

Fantastically detailed repair thread, @David Cook — thank you! You said: "The biggest mistake when repairing these machines is providing power during testing to only one of the +V inputs." QUESTION: Is your photo below showing us what we SHOULD do or should NOT do? (What my eyes see in that...

Sony Mavica floppy disk camera photos! Love it! The translucent brown 4700 pF is a Type Y (line-to-earth) safety capacitor. Not sure if it's Y1 or Y2, but it's probably 250VAC rated, which means that either Y1 or Y2 can be used. That's because Y1 offers an 8,000V impulse rating, while Y2 is a...

Hi, @phipli ! A "memory timing" tweaker — very interesting! I also see we defining the 475, 476, 575, 577, 605, 610, 650 and 800 as being the "Wombat family" of vintage Macs. The file you graciously attached for us appears to be an alternative to using your excellent 475 Overclock software...

@daanvdl Thanks! I just added a link to your Github in the "Recapping" tab of my Mac Portable spreadsheet here: https://docs.google.com/spreadsheets/d/1m5aapJJs2hmjemjGnY3HjAuVnbH9uIF0SWSehzGOOQ4/edit?usp=sharing

Thank you for the excellent graph, @moldy! @techknight has an excellent video showing precisely what kind of damage a PowerBook AC Adapter does to a Macintosh Portable: So Portable owners must stick with the M5136 adapters OR buy a Portable Battery Eliminator so you can use any AC Adapter...

But would the spots have resulted from 5~20° (°F?) higher than your chosen bake temperature, or would the spots have results from a SECOND BAKE regardless of temperature? Separately from that, i agree that having a turkey thermometer or similar in the oven during the bake is key, and that is...

Wow. That LCD looks perfect from what I see in those two photos, with no unusual lines on the screen, no darkness at all that I can see, and no darkness in the upper right hand corner either. In one of your earlier photos, you photographed a screen that had a little bit of curved darkness in...

I normally leave the white vinyl cover on the solder side of the analog board off so that I can more easily measure voltages at the very back of the main connector where the main harness will connect on the flipside of the board. And almost always, that voltage level is going to be higher than...

Wow, that’s pretty neat. I must assume that in all of your machines you are using the stock wiring harness, whereas my harness has been upgraded to 16 gauge wire. Wire thickness has a rather dramatic effect on the voltages you will read at the external floppy drive port. Another important...

Sorry for my delayed response. On one of my SE/30 Analog Boards (all 3 of which report 5.04V at the FDD connector via Mac-O-Meter), I measured the following tonight: Collector of Q2 is 19.68V. Pin 14 of U1 (74LS38) is 4.878V Sorry, but I didn't have time to do a board swap to test the SE/30...

Agreed. But thank YOU, David, for your time and effort. I always stand in awe of your creations, and this time is no different. Oh... Try putting the Portable on your lap in bed. I did that the other night and it was pretty crazy. Fun, but crazy. And I don't even have a lead acid battery...

THE definitive solution for every 5126 Backlit Macintosh Portable owner's sanity! @David Cook , you are a miracle worker! I announced your Macintosh Garden page on my YouTube channel (via Community post) and in the Vintage Apple Macintosh Enthusiasts FB group just now. I also added a link to...

I'm at home now and finished testing. I booted from your *.dsk and 1 minute later, auto-sleep worked just fine. Of course, I hear that bothersome pop every 10 seconds because the Portable C.P. isn't the hacked version, but as we've discovered, the hacked version prevents sleep. After that, I...

BTW, I checked and found that this forum already allows moof and dc42, so it makes no sense to disallow support of dsk, so I added it. Now everyone can upload *.dsk images without name changes. You can see that in the attachment to my message. Just reload this web page in your browser to see...

Thank you, David, I will try your disk image on my FloppyEMU tonight after work. Desktop Manager has nothing to do with it because I tested with and without it, and my Portable still would not Auto Sleep under 6.0.8. I will just delete the last 4 characters of the filename as shown below...

I have a MacEffects RAM card which I have artificially limited to 5MB by way of not running the required jumper. (Limited RAM is painful under System 7, but that horrid 26% performance drop when using >5MB RAM is even more excruciating.) If you have a disk image you don't mind sharing with me...

Do you have a BlueSCSI v2 or spinner drive? Do you have a lead acid battery or Battery Eliminator? My BSv2 is resistor modded to avoid wake-from sleep issues, but I don't see why that would PREVENT sleep, especially when I can sleep under System 7.1. But I am glad your testing does show that...

Just to ensure this thread isn't left dangling in the wind until the end of time, the implications of my previous post are: 1. I cannot confirm if the v1.3.1 "Portable" Control Panel blocks Auto Sleep under System 6 because, for reasons unknown, my 5126 Portable refuses to sleep while booted...

I'm now at home and here are my test results. Booted into System 7.1 with version 1.3 "Portable" Control Panel (stock from Apple, without any ResEdit hacks). Of course, I can hear that bothersome "pop" sound every 10 seconds in this case. Computer will sleep after 1 minute with PBTools, even...