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What are the best CPU acceleration options for the Macintosh Classic?
bibilit replied to PowerMac_G4's topic in Compact Mac
A Classic II board will not be a bad option. -
In your picture, you have got a jumper in position 2 (ID Bit 2) / 5 (Enable auto spin) but nothing on pin 6 (S/E mode) then a jumper on pin 7 (Disable Unit ATTN) So the default setting is LVD until the jumper is present. What is the brand and type of this drive ? you can probably find information online.
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The internal drive is probably stuck. Grease is known for hardening with age, floppy carrier is unable to move or slide. Cleaning and lubricating is probably all that is required to get it working again. Yes, a small gear is prone to breaking, but can be found new.
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LC TDK power supply starts when it feels like it
bibilit replied to Arisotura's topic in 68k LC & Performa
Can be a bad shunt regulator, or just the same part goo contaminated. Happened to me often. -
I will say also UE8 or UF8. In that area at least.
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Not a big deal, rotating the yoke is pretty easy, done hundred times. Seen more issues with the yoke than with a screen misalignment, but not saying is not your issue here.
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A Macintosh Plus with RAM problem symptoms (but it's not that)
bibilit replied to Roberto's topic in Compact Mac
Ok, but have you the exact same issue when swapping Roms around ?? What happens when the "Bad" Roms are fitted to the "Good" board ?? (will not hurt the board) If not, the only issue i can see is that one of the logic chips handling the ram memory is bad, hence throwing fault codes related to bad ram when ram is ok and displaying weird display patterns ramdomly -
LC TDK power supply starts when it feels like it
bibilit replied to Arisotura's topic in 68k LC & Performa
Not at all, nothing in common. -
Yes it is, what you see soldered are the sockets for the Optoisolator.
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A Macintosh Plus with RAM problem symptoms (but it's not that)
bibilit replied to Roberto's topic in Compact Mac
Fault code is related to a Ram issue, but this kind of behavior can also be related to bad Rom, as the Rom is socketed, i will swap Rom in the Good Plus to see if Rom is ok or not -
Hard to say, can be anything from a bad trace to a sound chip. The Sound chip is on the Upper left corner (C28) label is SND. The chip is unlikely troublesome, but who knows, recently replaced one on a Macintosh Plus without sound and it came back afterwards.