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I agree, checking for voltages is easy enough (at the floppy port) if voltages are ok, try hitting the side of the AB board with a wooden stick, some broken joints are hard to see. The fact that the floppy drive is trying but not achieving is also a sign of bad voltages. If you are not too...

I have got a damaged spare board, so i will swap parts.

The more i think about it, the more i believe this is related with one of the Bourn filters... will let you know

The trouble is you don't have sound either, this is strange as both issues are not related, except if you have a wiring issue.

I wasn’t thinking about the rear connector, but yes can be the issue. Thanks

Hi, have a strange issue in one Plus. Working ok, booting from HD or floppy but displaying the message « disk not readable - erase or eject » The message is coming again and again, whatever the erase or eject button is selected. The floppy is not the issue, tested and working fine in...

H11AA1 is still available

yes this is the one, UE8 (74LS166D) https://www.demand.nu/retrotech/74ls166d.html You will need a soldering iron at least, but probably easier with hot air.

IIRC 2Mb ram modules are not fully supported by the SE/30 (only the IIsi can use those)

Your issue is related to UE8, part number is 74LS166 (don’t use the HC one) near a leaky capacitor, common issue goes bad frequently.

Never seen this before, the only difference between 800k and FDHD is Rom and SWIM, you can even upgrade the former one in last one. For me more a peripheral issue, keyboard or mouse not the issue ?

The only thing i am thinking is…maybe stretching the data cable is connecting something loose. I will check for a bad solder joint (connector side) or broken cable.

IIRC Churchill is present in the disk.

The CRT is small and tight , not easy to work inside. The only thing that can go wrong is the RIFA capacitor, so i will not worry until the board is not working properly.

Looking information or schematics for a Cube PSU. I have a shorted component but the only information that is present is the D3 label on it. Any clue ?

The floppy alone standing on top of the metal frame ? Without any protection in between ? So probably the board got shorted by the frame.

Not sure a 100% but concerning UE8, pins 6/7 and 8 don't look soldered ok, and barely touching the pads.

Hi, not easy to help, but the very fisrt thing to have a look at is at cold solder joints or broken ones, next is to have a look at voltage outputs (at the floppy port) You have adjustments on the side of the analog board, your image is stretched out and blurry, try to adjust it also first.

If you have got a chime, then the board has achieved the self test, can you post a picture of the UE8 and surroundings ?

Hi, have you removed or replaced the UE8 ?