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Techknight, you were spot on! I removed the SWIM, then I got a good chime and the "grey" RAM test screen. On floppy access it crashed, of course, without the SWIM. So I replaced the SWIM with the one from my donor board and it booted System 6 just fine! Now I got just one Portable M5120 left to...

Hi there :) Years ago, I finally got hold of a M5126 backlit Portable. It was untouched, never before been worked on. I was not surprised that it didn't boot and only produced a garbled screen, similar to a Simasimac. I removed the caps, cleaned the board thoroughly, soldered new caps...

Hi, no, the photos aren't from my logic board, and I didn't post them. I believe they've been taken from another thread where there was a question about how to insert the roms correctly, hence the single misplaced ROM. I double-checked the position of the ROMs in the sockets and double-checked...

Hi there, I checked the ROM pins and the sockets, the contacts are fine. It is really one of the ROMs (can't remember which one right now) which is dead. I even tried to warm it up with a hairdryer, no change at all. Is there any service document which shows the ROM pinouts? They seem to be...

Hey folks, I just received a Classic II with the common "thick vertical bar" problem. So far, so good, same procedure as every year. Wash the logic board thoroughly... Whoops? No Chime, still vertical bars? Okay, let's replace the caps with tantalum ones. What? Still no chime? Grrr! Then I...

Hi :) You're not going to have a problem as long as they don't blow up. It seems like they get a tendency to blow up when they're getting old and weak, so they're really time bombs. I haven't seen a single case of a different PRAM battery leaking or blowing up. I'd recommend you to remove them...

Hi there, over the years, I've seen several cases of 68k Macs with leaking PRAM batteries. Many of them didn't really leak slowly - instead they seemed to have exploded in an impressive way. Spray of corrosive materials seemed to have landed everywhere inside the machine. Then, I began to...

Hi, in my opinion, before doing anything else, you should save the contents of the disk to an image using "disk copy 4.2". this can read and store Lisa disks in a safe way. You should then write the images back to blank disks and use the copys. This way nothing can go wrong. To use disk copy...

Hi, to be correct, it is a simple and cheap hot air rework tool made by "Aoyue", but does an surprisingly excellent job. I practiced using it with a IIci board which was beyond repair (exploded PRAM battery) and had no problem removing even big PLCC ICs with the included special jets. For the...

Hey, I just desoldered all the electrolytic caps with a hot air reflow tool. No lifted pads, everything looks good. I'm quite sure that there's no damage to the copper traces and interlayer connections surrounding the caps. The board has been washed and dried twice now, one run with a mild...

Hi, thanks for the eBay link, but there's a catch or two. :( First, I am not from the US area, so I'd have to pay an awful lot of customs additionally to to the already pretty high price for an EPROM, a diskette and a pretty common microcontroller. Second, I contacted Vintage Micros before...

Good morning! (8 AM over here) I tried every combination of RAM, RAM sockets etc. that made any sense and also swapped the RAM with known-good modules from a working SE/30. No success. Wally: Sadly, only the CPU is socketed (and the video rom etc. of course). I already thoroughly cleaned all...

Hi :) I am searching for the low level formatting kit for the Apple ProFile harddisk. This was a kit which consisted of an EPROM and a 5,25" disk containing testing/certifying software for the Apple /// which initiated the formatting process. I got all the necessary hardware (Apple ///...

Ah, that's it... I forgot to try bubblegum. The only question is - where should I stick it to? By the way, eggs won't work. The CPU doesn't get hot enough to fry an egg. This trick is reserved for modern CPUs. }:) I fact I'm not even a fan of MacGuyver. Maybe I watched about 5 episodes when...

Oh, i have to correct myself. I do get CRT heating with the broken logic board, but the high voltage is missing. I also just tried the reset button, which gives me a nice gong everytime I push it. I also get the usual sad mac sound if I push the NMI button directly after pushing the reset...

Hi there, I got an SE/30 which behaves weird. On Power up I get the normal gong, black screen, no signs of drive activity on the internal HD, on an inserted boot floppy or an (known good) external floppy. The CRT doesn't heat and the high voltage to the CRT is missing. Okay, swap the PSU or...