Search results

Man. I'm blown away you guys know this much about these machines. Incredible. I'm out of the country for a few days but illl post an update as soon as I'm able to check those pins. @techknight, I don't have another se/30 to swap rom-sim but I do have a working SE. That wouldn't work would it?

Gotchya, that is helpful. This is the first time I've tried to resurrect an old 68k so I'm entirely new at this, but I'm enjoying learning. Appreciate all the help you've given so far (also ran into some of your videos on youtube - awesome stuff!). I'll be sure to pin 100% of the muxes, is there...

Thanks for the great theory and reply apm. So following your advice I booted the mac up (interestingly the floppy does work intermittently, so that's a slight change from my original post). However, using the key command Shift-Command-3 to take the screenshot resulted in the system crashing (3...

Another update: I've replaced C2. Still the exact same pattern and considering how many traces I've Che's in the video video system im starting to think either there are bad ICs in there, or it's not the problem. @techknight, you obviously know what you're doing, so pardon my ignorance, but how...

Update on my progress: I mapped out all the pins for UC7, UC6 (VRAM), UE8 and most of the other muxes using schematics and a spreadsheet. Then I checked continuity for all of those pins/traces, they all worked flawlessly. I found no bad traces at all. I was doubly careful to check around the C7...

Ok – again apologies for fumbling around, I'm trying to learn on my feet. So I've gotten a hold of the schematics for the "Video Interface" and I've been looking it over trying to understand exactly what you think I should check. Just to be sure I'm thinking of the right things, and that I'm...

@techknight, sorry to overlook your answer - I read it and I was admittedly hopeful it wouldn't be that...I'm a bit timid of checking the traces, never done that - do I just use a multimeter to check for continuity? Might be above my pay grade but I'll give it a shot.

Also I did try removing and cleaning/reseating the ram but I didn't try without the ram in. Should I do that? How about C2 and C11 which I didn't replace. Any chance those could cause this issue? (Sorry for being such a noob at this, is there a schematic that would show what system C2/C11 are...

Is there any way to know/check which cap jobs are bad? Or should I just replace them all

It does indeed! I had read that issue (here: http://www.biwa.ne.jp/~shamada/fullmac/repairEng.html#CheckerFlag)and foolishly assumed when it said "No startup bong" that it meant it didn't boot up at all. Ok so, my next question...I've already pulled the ROM-SIMM out 2 or 3 times and done my...

I've recently gotten my hands on an old SE/30 that was stored quite well for the last few decades. I booted the machine up 2 years ago, and at the time it worked like a charm. When I went to start it up recently it displayed a typical Simasima (Horizontal lines, no boot) symptoms. I've done the...