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Two years ago I received for free a Quadra 630 from a family friend. Back in the day, I had a Centris 650 bought new in 1992 which I replaced with a PowerBook 5300cs purchased later in 1996. Hence, I completely missed this model and its cousins, and was completely unfamiliar with it. The...

For my final project for #MARCHintosh 2024 I installed A/UX 3.0.1 on my overclocked Centris 650. I primarily followed Eric Edge’s guide with a modification. Rather than using a burned CD and CD drive, I was successful in using a BlueSCSI version 1.1 with the CD features implemented in firmware...

For Marchintosh 2024 I’m tackling a project that has been on my list for a while: overclocking a Centris 650. The Centris 650 was the first Macintosh I purchased for home use back in the day, and at the time I was blown away by its performance relative to the Macintosh SE/30s I was using at the...

Addendum for iBook G3.... The livecd disk presented a black screen near the end of the boot sequence. This is fixed by entering a kernel parameter in the grub menu, "nomodeset" with no quotes. For the record, here are the /proc/cpuinfo and lspci details: livecd /mnt/gentoo # cat...

I’ve been tinkering off and on for nearly a year with Gentoo Linux on a 800 MHz iBook G4 from 2003. As you may be aware, pickings are slim for active Linux distros that support PPC. Besides the excellent Lubuntu 16.04 Remix by @wicknix, and Adelie Linux, the only other option that I found is...

My first guess is along the lines of what @phunguss said, from my experience of restoring a Classic II. It will need a recap of the surface mount electrolytic caps if it hasn’t already been recapped. The Classic II also comes with RAM soldered to the logic board that also serves as video RAM...

Following. My Pismo’s original battery is still functional but doesn’t hold much of a charge anymore.

My latest escapade in PPC Linux for the PowerPC Challenge was attempting to get Gentoo Linux running on another iBook G4, which has been a big fat fail so far and of course the month of January is now behind us. I haven’t given up yet and have been slowly chipping away at an installation where...

I wrote about my experience installing Lubuntu 16.04 Remix on a white iBook G4, which went quite well. https://tinkerdifferent.com/threads/dual-boot-lubuntu-16-04-ppc-remix-with-mac-os-x-on-white-ibook-g4-800-mhz.2778/

In my case, my IIci shows a black screen and no boot chime at startup with a bad cache card installed. Without the card, the IIci chimes and boots normally. From there, running a tool such as what @Garrett used or a benchmark tool to verify performance.

A while back I was researching information on building PRAM battery replacements for my PowerBook 5300 and Pismo and ran across this PowerBook PRAM Battery guide written in German. Perhaps this might help? The original color PDF is too large to add to this post, so I attached a grayscale...

Hi Colin - Will Jacobs has a YT video talking about artifacting caused by a board error, here: . But since You are talking about simasimac, this YT video shows troubleshooting and resolution due to poor connections: Like others have posted above, your likely culprit is a poor connection...

Hello, fellow Tinkerers! Although real life has intruded on my tinkering over the last few months, I’ve managed to squeeze in a small project or two. One of my background projects during this low key period has been testing OpenCore Legacy Patcher (OCLP) on a variety of unsupported MacBooks in...

@Tony359 on YT posted a video recently about restoring a drive on a //c, perhaps there are some pointers that might apply in your case? I’ve bookmarked his video for later reference when I return to my //e which is showing very similar behavior that he covers in his video.

I take it that your IIci does not play those chimes without the cache card? In my experience those chimes indicate bad RAM. Interesting that with my bad cache card I don’t get the chimes, just a hang during the boot process with the IIci stuck on a black screen. Paging @Garrett to weigh in on...

I recently restored a White iBook G4 (PowerBook6,3) from 2003 sporting an 800 MHz PowerPC 7457 (G4) by adding a modern SSD replacement for the missing hard drive, replacing the malfunctioning Combo CD/DVD drive, and giving it a through cleaning inside and out. The iBook G4 required almost...

I’ll add my own SRAM chip list for comparison. 28-pin (4) CACHE 24-pin (3) TAG Card 1 (working) P4C164 - Performance Semiconductor P4C116 - Performance Semiconductor Card 2 (non-working) CY7C185 - Cypress Semiconductor MT5C1608 - Micron Semiconductor i wondered if the...

Not yet, Garrett. I wondered if the MT-branded 24-pin TAG SRAM on my bad cache card might be the problem since MT-branded RAM is so often a failure point in 8-bit computing. I used the guide Kai shared to identify a replacement with the same pinout and installed them on my cache card...

I restored a Classic II about a year ago that exhibited the gray screen but no cursor. I wrote about my experience here, see if this might help at all. https://tinkerdifferent.com/threads/adventures-in-classic-ii-repair.1149/

Because you put in a known good board and the CC worked, that also rules out the large connector as a problem, something that I encountered in the past. Beyond @Mu0n‘s suggestion about vias, I’m not sure what else to try other than EGRET and/or sound chip replacement.