Mu0n
Well-known member
Here are the steps that led me to this situation.
Mac Plus #1 - 1.5 MB - early beige model - working ROMs, boots normally
Mac Plus #2 - 4 MB - platinum model - was initially doing a Sad Mac 01E000 error
Here's what I did after:
-Recapped both analog boards
-Recapped #2's logic board
no change in #2's problem. I put in #1's ROMs into #2 and it would boot, but weirdly. It would look like the screen seen in the image attached to this post for 7-10 seconds, then do its beep sound and then I'd get the normal disk request screen. I was able to go into Finder, load games, etc.
-I ordered a new set of ROM burned on EEPROM by someone
-Accidently put them backwards and got the black/white vertical jail bar with some stray white pixels
-Put them back normally and now I get the screen as shown in my picture again, but no amount of time gets it to boot normally, it stays with the garbled checkboard pattern.
-5V and 12V look fine off the disk drive connector
-I swapped the whole Mac #1 logic board (as opposed to only the ROM chips) to Mac #2 and it boosts instantly and well as it should. So the problem is somewhere on #2's logic board for sure (including the new ROM chips)
-next step (haven't done yet) is to use the new ROM chips on #1
Mac Plus #1 - 1.5 MB - early beige model - working ROMs, boots normally
Mac Plus #2 - 4 MB - platinum model - was initially doing a Sad Mac 01E000 error
Here's what I did after:
-Recapped both analog boards
-Recapped #2's logic board
no change in #2's problem. I put in #1's ROMs into #2 and it would boot, but weirdly. It would look like the screen seen in the image attached to this post for 7-10 seconds, then do its beep sound and then I'd get the normal disk request screen. I was able to go into Finder, load games, etc.
-I ordered a new set of ROM burned on EEPROM by someone
-Accidently put them backwards and got the black/white vertical jail bar with some stray white pixels
-Put them back normally and now I get the screen as shown in my picture again, but no amount of time gets it to boot normally, it stays with the garbled checkboard pattern.
-5V and 12V look fine off the disk drive connector
-I swapped the whole Mac #1 logic board (as opposed to only the ROM chips) to Mac #2 and it boosts instantly and well as it should. So the problem is somewhere on #2's logic board for sure (including the new ROM chips)
-next step (haven't done yet) is to use the new ROM chips on #1
Last edited by a moderator:
