thanks so much for your help. I guess the next step would be to put the scope on various parts of the card but I'm just lost as far as what to look for.
I did order another video card. Just couldn't help myself 50 bucks on eBay so that will definitely narrow things down. hopefully that card...
this card is the "BCGM0322 high resolution display video card". Everything I've read indicates it is compatible with the Apple M1212 monitor. I know that the monitor is functioning correctly because the guy I bought it from demonstrated it for me a few days ago and it was fine.
again, the boot...
tried a boot floppy and it definitely stays in the drive and makes all the correct sounds like it's loading the operating system. However, still white screen on the monitor.
I have not tried to boot floppy but I will tomorrow. I'm so used to working on SE's and SE/30's that it didn't occur to me that these might behave differently without a startup disk. if that's not it, I will definitely look into the 74 series logic chips.
OK also I'm gonna check the Nuchip and nubus slots with the scope. Any idea which pins I would need to check specifically? If not I can go through the schematic.
good point. Will do this week but I need to order more caps unfortunately. Any chance these will at least run without caps like an SE 30? doesn't even have the axials.
Recapped Power Supply is putting out 5.1 v and 11.94 v.
floppy drive is also working flawlessly with cleaning and new eject gear. Ejects blank disk on boot.
What is this heresy ChatGPT is talking about?? Could there be any truth to this? never heard of such a thing. it's true, I haven't attached a startup disk yet. If all was working correctly, I should expect a cursor and flashing ? ... shouldn't I?
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Your suspicion about bad VRAM chips isn't...
I recently got a IICX DOA from eBay. Recapped the logic board, graphics card, power supply and floppy drive. Cleaned it up, put it all back together and thankfully got a nice boot chime with no issues other than the fact that I'm just getting a blank white screen on the monitor. I noticed when I...
Do you mean Recon or AppleCAT? I know there is AppleCAT for various Mac models just not sure how well it works.
https://macintoshgarden.org/search/node/AppleCAT
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