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Computer will boot in a normal amount of time using the Disk Tools disk. I ordered a new floppy drive from ebay, and.... it has exactly the same issue, so I have to conclude that the issue is not related to the drive as such... Reading and writing to disks initialized on my other macs (e.g...

I have this weird problem with the disk drive (Sony MPF 42A) in my Performa 475... Every time I try to initialize an HD floppy disk it fails at the verification step with ''Disk initialization failed because the disk is defective". When I try to initialize an DD floppy disk it immediately fails...

Maybe a silly question but I noticed that according to the LC service manuals the fan should be installed with the logo side down : My Performa 475 has a fan installed with the logo (label) side up... which made me doubt on what the the correct airflow direction should be... ? Should the fan...

Yes, sorry, that is what I meant :)

Yes I can, overclocking was already on my planning. Nice! Thanks you.

Thank you, downloading Norton Utilities and Mac Test Pro... :) I got an SE/30 together with a broken Color Classic (got it repaired in the mean time). Last week I scored a cheap Performa 475, for which I'm still awaiting an RGB to VGA adapter from ebay. I actually never owned a Mac before, not...

Sorry, I got my first Macintosh about a month ago, so everything is new to me :)

Wow, that was quick! Thank you :D

Someone local was selling a Mac SE/30 and attached the following picture : Does anyone know which test software this is?

I gave up and bought a new old stock logic board... now the CC boots and runs perfectly! Conclusion : Analog board etc are working, the issue is located on the logic board. I swapped the roms from the working to the non-working logic board but it doesn't fix the issue, so it is also not the roms.

The battery packs used in machines using a battery pack are 4.5V, so I guess the diode is there to lower it to 3V? I removed the diode anyway.

Yes I am sure it is not booting by just looking at the activity leds on my BlueScisi :) I have reassembled the CC including the bottom RF shield, as far as I can see the connectors are all making good contact. Unfortunately I don't have a thermal camera, nor do I have a scope (yet).

Thank you, I flashed both but my CC is still not booting. I think it's not the roms chips in my case that are faulty.

I have 27C400 EPROM ICs available, and have a programmer to do so (TL866 with adapter)... but I can't seem to find the Lo + Hi bin dumps . I do find single ROM files, the so called old world roms to be used by emulators. Can these be split into two and burned direclty to 27C400 EPROM ICs?

Yes they are a lot of fun :) I honestly think compact macs are very serviceable compared to other computers from the time. I think it indeed seems that the machine was modded to use a battery pack, there is some kind of velcro pad present so I guess this is where the pack was placed? I fully...

Yes, I tried booting without the battery present, it doesn't solve the issue. Reset PRAM doesn't produce any chimes so I don't think it's doing anything.

Have you installed MODE32 and enabled 32-bit addressing before the RAM upgrade?

No hdd reading sounds, and also no BlueSCSI's activity LED blinking whatsoever unfortunately. No sound out of the headphone jack. :( I adjusted the main brightness pot but still no video.

Interesting... Why would someone place a diode there? I don't see any corrosion around the Egret chip, can this chip only be replaced by one from another CC chip or is there a replacement chip available?

Thank you for the feedback!! The fan and disk do not spin when I flip the switch, they only spin when I press the keyboard power key. The voltages on the harddisk molex connector are 5V and 12V, so I think the psu is outputting the correct voltages. The LB is seated properly. There are no...