techknight said: Your not gonna see via corrosion AFTER you already washed it. You needed to take note of those beforehand. Click to expand... That's why I'm having troub…

Hi... I need a schematic for a color classic analog board.  Where can I down load one or buy one? Thanks jack

Well it's hard to tell if it's the ROM chip or the Mega II. I also played around with the scope and followed the schematics, but I'm not able to pinpoint the root cause. Here they…

This happens if the ROM cant see the SWIM. grab the classic schematics and go throught it. Your not gonna see via corrosion AFTER you already washed it. You needed to take note of…

Thanks for the suggestion, I don't get a flashing ?, yet.  I removed the RAM card and it did not help, in a separate attempt, I removed the HD cable and the startup remains unchang…

As long as you got the flashing '?' inside a floppy disk icon, the Classic is or should be working. You got a Bong an you got video - that's 2 out of 3, which the third is booting.…

Could be the HD, try disconnecting it and booting from floppy

Its weird that only text is having a problem. That and the ROM checksum is passing. The only other chip I can suspect having a problem is the MEGA II which contains the character g…

I picked up a Mac Classic (2MB, 40MB HD) and it was immediately subjected to a recap.  As part of that process, I cleaned around the old cap areas with alcohol and re-tinnned the p…

It actually looks like what my vision does to me, from time to time. lol. But I digress.... double data = missing upper address bit/select signal on character ROM. 

Elfen said: If it were a Mac SE/30, I'd say part of your video circuit has lost a couple traces. Click to expand... Something like this would be my guess as well. I don't…

I can make out "System Good" on that image, but you say it freezes at that point? Interesting. What cards are you running on the IIgs? Have you run it without cards? If it were a…

Schmoburger.... Point well taken.  I restore old vacuum tube motion picture amplifiers for a hobby 1930s-1950s equipment.  I keep them all original.  I would prefer to drop in a …

TheWhiteFalcon said: Both are also quite rare (fewer than 150,000 Cubes ever made)...I'm not going to lie; not the biggest fan of FrankenMac-ing the rare ones at this point. …

I tried reseating the chips and no luck. I'm not sure how to clean the sockets honestly. The problem is also present on the composite output. The monitor is an Apple RGB monitor …

MinerAl said: 3) I think the Trinitron tubes had a unique curve to them, so even if you find a 10" CRT, if it ain't a Sony it may still not fit the bezel perfectly (and yet s…

Looks like the AppleColor RGB monitor the IIgs is paired with normally. There is no character ROM on a IIgs, it is stored in the main ROM. Have you performed a self-test? Hold down…

What kind of monitor is this? Have you tried it on a Composite Monitor? If not, check your VGA Settings. 

Hi folks... I have a technical question (?) on Chris Lawson's VGA mod of the Color Classic.: http://colourclassicfaq.com/general/vga.html First, I would like to quote a post mad…

You dont have a 5500/6500 laying around do you? Click to expand... I agree, those are pretty cheap are not really sought after, will try at least for testing purposes.

Hearing buzzing matching system functions is the TAM buzz. Means your audio isn't toast, but something is stopping it from producing sound.

If all else fails, sourcing a 6500/300 board, desoldering various connectors to make it fit, etc, would be a good project.  The baking sode mixture sounds like a bad idea IMO, and …

I'd remove the socketed chips, clean contacts and reseat first

I've had a "Mystic" VGA-modded Colour Classic with LC575 board which has been running fine for a decade, and it's one of my most used 68K Macs.  I was also given a "Takky" VGA-modd…

You can find 10" "flatscreen" monitors out there, but you'll have two problems to overcome. The flat screen won't fit the very curvy bezel that housed the very not-flatscreen Sony …