of course lba-48 is optional, I included it as much as an example of how to set multiple variables as anything else. It does seem to work on my sawtooth, (Uni North Rev 3 btw), bu…

There is also a similiar discussion here http://www.cubeowner.com/forums/index.php?showtopic=12512 at the cubeowner forum about how to manually edit the open firmware to allow OS 9…

Thanks, that's exactly the detail I wanted. I notice you have added a new line enabling the lba-48 property. Can this line be considered optional and be omitted from the patch if …

Note- I've updated the patch slightly based on some research... the Sawtooth 8.6 only seems to like 7400 and 7410 processor models. Reading some opensource PPC code online lead m…

Thanks for the firmware patch. I can't wait to try it out on my 7455 upgraded sawtooth. However, I have never done any open firmware editing before and I was wondering if you could…

... I should mention that Sawtooth G4 shipped with PowerPC G4 7410 7400series CPU and that OS 8.6 doesn't like upgraded 7445 7450 7455 or whatever (it shows up as a bootable choice…

Hi Trag, many thanks for your reply. I would very carefully examine the area around the 53C80 chip for damage/corrosion from the leaking capacitors. Click to expand... T…

I would very carefully examine the area around the 53C80 chip for damage/corrosion from the leaking capacitors. Also, to the extent you can, visually trace the connections to the…

Hi all, After washing and recapping my SE/30´s mobo, it now starts with a loud, clear "bong" -- no more SimasiMac! Here it is, connected via LocalTalk to my Quadra 700 (as AppleSh…

So after nearly a year, I'm reconsidering working on this iBook again. I just wanted to see if there were any second opinions about whats wrong with it. For a flashback, this mach…

There used to be arguments among memory upgraders about whether to use sockets or not. There are some 128K boards which just don't have enough juice to drive the extra capacitance …

I just went and bought a new screen for my PowerBook G4 today! Now all I have to do is wait 3-4 days. Finally, I'll be able to use it as a laptop, except I don't have a battery…

Notice, he's wisely replaced them with sockets. But I have a stack of failed 128K boards all with Apple-branded, Sad Mac RAM error codes in need of replacement. Yet I have never se…

excessive shorted turns in the primary of the flyback will cause the flyback, and the horizontal output transistor to run excessively hot. Keep this in mind as well.... loose cores…

I have one that fizzes Nicola Tesla stylee (big blue arcs of HV) the sparks come from the triper (next to where the red HT cable is attached) to the scan coil cables, looks great i…

I know this thread is now somewhat old. I have an Atari ST 1040 with Sequencer One Plus (now free) and that is the tightest to date. It has two issue that get me, one is it sends …

I had success repairing two of my mac portables with Sad Macs after lengthy board repairs. As for opening the batteries, its been quite some time since I opened one, I used a box …

I had two dead Portable batteries. I wanted to re-cell them, so I attempted opening one with a screwdriver, but that totally messed up and and bent the plastic. I have one remainin…

No, they don't all have working batteries.. yet. I have a whole stack of macs, I have been collecting them for years, due to the fact many that I bought had varying problems with …

If you installed any backwards, that is exactly the problem. You have a lot of Portables. What do you do with them all? Do they all have batteries that work?

Actually i think i know why.. It seems I installed the all the wrong way around... ARG! Why is the painted stripe on SMD caps negative, but positive on tantalums! GO FIGURE!@ WO…

Hi Everyone I've just rebuilt about 12 of my Mac Portable's however I had one issue, when I replaced my some of my portables SMD caps with Tantalums, well 3 of them caught fire! …

Yes, trag's caps are great. I need to get some more from him. I am missing one capacitor in order to complete the replacement on my SE/30. I am also missing one capacitor in order …

Thanks to Trag whose handy capacitor kits make it easy to get into fixing up these boards. If it weren't for him, my portables would still be sitting dead in the closet. :beige: …

I finished capacitor replacement a few nights ago. Here are some pictures.