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OK, first thank you a lot for all the replies! To bibilit: yeah, I have tested it in this way... but nothing... the same problem... Probably, for reasons of bad voltages or other due to bad capacitors, the analog board is unable to power and then start the logic board of the Mac Classic II. I...

Hi all! I'm trying to bring back to life my Mac Classic II (with logic board rev B). Briefly my story: (Sorry for my bad english!) I buy this Mac Classic II on the internet which initially worked without problems but only the sound did not work. One day I go to turn it back on and nothing ...

Thanks a lot for the precious utilities. So, my only test (that freezes the Mac) was with a LCD only on the ProNitron and nothing on the internal video. My Philips LCD usually also shows unsupported resolutions even when displayed incorrectly (its maximum is 1280 * 1024), but considering the...

Melkhior you have been extremely thorough and very technical. My Mac Quadra does not freeze when I connect my LCD to the internal video card (while obviously the ProNitron card is installed in the Nubus slot). As soon as I have time I have to try as suggested by Bolle with Gauge Slot Info to...

Thank you a lot Melkhior and Bolle! I've tested only with Mac OS 7.5.5. My Quadra, freeze once arrived on the desktop (I think with the dark on my LCD). Because I can't swicth it off with soft power key of keyboard and no any other response from keyboard and mouse. No splash screen on my LCD...

Thank you Bolle! Can I ask you the model or the brand of your adapter? During my tests I have removed the "ProMem 80.21" module and I discovered a sticker that on the bottom chip indicates a big "80.19 V 1.6" ! So should it be a ProNitron 80.19 and not an 80.21? I have make various tests...

@Bolle Please, can you send me the dip switches settings to set my mac-vga adaptor work with the ProNitron card? Thanks a lot!

Thank you all for the precise and technical responses!!! all my doubts are now solved. :)

Thank you slomacuser! beyond the position of the card and the importance in terms of read/load, so in terms of energy there is no difference between the various slots?

Hi to everyone! this is my first post here :) I'm a Mac user since 1992; now have recovered a Mac Quadra 950 with 64 MB of RAM and this is fantastic! My question: I have recovered a NuBus graphic card (Formac ProNitron 80.21 with vram expansion), into the Mac Quadra there are five NuBus slots...

Thank you demik!!! you clarified my doubts but how can I update my ROM if mine is too old?

Hi everyone! I'm an italian old mac user (since 1992). Please, I need more information about Formac ProNitron 80.21 (mine have a small sticker with "V24" on a chip and module promem installed). If possible I need the most updated driver for Mac OS 7.5.5 - 8.1. With the memory module (promem)...