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Those are advertisements; but still interesting, though! On my machine, at least, there are custom ROMs that aren't just a copy of a Mac Plus ROM. There's a set that seems to do some initialization of the MonsterMac's hardware, and then there's the set on the motherboard. From what I can tell...

It should be safe to you if you use a high-voltage rated silicone. This does not, however, mean that it’s going to a) last, or b) not fry something when it inevitably does have an internal insulation breakdown. I concur with replacing it if possible.

Have one of those; but yours seems to be a newer build than mine is. I've got a Rev C, dated 1985, SN1093. Instead of a SCSI chip, I've just got an unpopulated space on the board for a 2-row header, labeled Levco Expansion port. Mine had one of the mask roms die a long time ago, and just a few...

That’s odd… they were there when I read the post sometime around midnight (it’s 7am-ish now). I didn’t see anything bad in them either (exposed credit card numbers, stuff in reflections, etc… just a Mac). Huh.

Has this machine been in a particularly humid environment, or had anything spilled on it? I'm seeing an awful lot of corrosion, but not much outright leakage from electrolytic caps (at least, in the photos posted). Yet. The caps will - sooner or later - leak. They always do. If any custom chips...

DISCLAIMER: This is just based on my general knowledge of electronics; I have no personal experience with fixing this on a Mac Plus. Hopefully somebody else with actual experience will make a post. I think that what they mean is that the yoke magnets have loosened over time, and that during...

Kai - If I thought I was entitled, you'd be receiving a demand letter with a threat of litigation, bad luck, and smelling like an ogre for the next billion years. ;) It was just a polite request. I just hate to see good work get abandoned, and lost to the abyss of time... that's all. As I...

Well -- I do understand the frustration of having the rug pulled out from under you; so if you feel that's what you want to do, OK... ... but before you quit completely, can you make sure that all your project files (including the source for any custom tools you may have built) are up...

Could you design in the extra hardware to operate bidirectionally, and just not populate that area of the PCB for the unidirectional boards?

I don't recall any diagnostic software ever outputting over SCSI... but that doesn't necessarily mean that there never was any. As for which software to use, it depends on which Mac you are having trouble with. 

Or, if you do, you are also implicitly specifying the resistance of the circuit. R=V/I - "Ya canna' violate the laws of physics, cap'n!" Lt. Cmdr Montgomery Scott. I think it depends on who "you" is, and how unlucky you are. Sometimes people have heart conditions that they don't know about. On...

FWIW, it's a common myth (er, oversimplification, really) that electricity takes the path of least resistance - it actually takes ALL paths, but how much flows thru any given path depends on the resistance of that path as compared to the rest of the paths. If, for example, you have a positive...

Also known as "spudgers" - and no, I have no idea where the name came from. But - yeah, they're great to have around; especially for those doggon' FFC connectors. :)

Both my 128k and SE won't open just by gentle shaking... but, they are early machines, so perhaps the molds they were made from were a bit tighter than yours? IIRC, the Aquadag on the inside of the CRT is pulled to positive 15 to 30 kv or so relative to ground (which is why that terminal is...

Umm... that's a Torx T15, not a T8. Also, a sheet metal spring clamp to pry the case open after removing the screws is handy.  :) Ditto on the not-electrocuting yourself part. Compact Macs have CRTs in them that retain high voltage even when turned off and unplugged... and there's enough...

You are in a maze of twisty little wires, all alike. > :p

Well, I'm no expert on ][ drives, but... That looks like an inductor; and if I'm right, then there's nothing inside it to be leaking out. I agree with Joe - it's most likely glue; commonly called "Silastic" (even though that's a trademark; see https://en.wikipedia.org/wiki/Silastic  ---  kinda...

Oh, and it's still got some charge on it: a whole whopping 50 millivolts!  :p

So, I just popped open that SE that I was given, fearing the worst... but, NO! No acid spilled across the Logic Board: ... and that battery has a date code of 6/88! :)

There are FPGAs that can do DVI and HDMI directly; and I have here an FPGA dev board (Papillo with an Arcade MegaWing) that does VGA via a R2R ladder.