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RP7 quite possible its dead. Can you boot it from floppy?. If so may be scsi chip is dead as well

I'd send it back to Will. Have you tried the original ROM sim? Did you wash in isopropyl after ultrasonic and leave it a couple of days to ensure it was fully dry? Check what pin 7 and 8 on the 68882 do, quiet likely shorting would affect it and other chips

Any recommended suppliers?

Old thread but I have this problem with no boot from 7.5.3 and I have tried the resedit fix to no avail???

Zebra lines is what you get without the ROM sim. Are you sure the sim is OK?

Also check all the pins and the socket for corrosion. I've found even the slightest amount an cause video fail.

Thanks for all the info folks. I have managed to get a rough monochrome pic by combining the RGB input. I've also positioned the image on the screen with the various adjustment controls but it is a pretty average result when compared to the RGB to HDMI output from same Plus source. RGBtoHDMI...

Finally got this working. Anyone give me a heads up on settings for B&W output from a mac plus. I have a picture but only in RG or B depending on which colour input on the input socket I plug the video out from the Plus into

Thanks for the info. Not sure what to do with it but good to know

Anyone know what a -43 error is. Getting when I try print or setup page on two different computer one System 7.6.1 and one system 9.2. Followed the instruction to install Laserwriter 8 and setup a desktop printer all went well until I try to use it!

Well done you'll be an expert when you do your next floppy repair!

"A recap/update: It now successfully formats, verifies and mounts 800k disks (two-sided) in one shot (without having to format one side first). It appears to format 1.44mb disks but immediately fails/ejects on verification with every disk I've tried (about a dozen) that work fine in other...

Have you serviced the drive? Looks like sticky old grease causing it not to go in and then once that is done you need to realign the track zero.

Yes track zero alignment will be the problem. Loosen the screw holding the motor just enough to get some rotational movement and then rotate the motor Really small amount in one direction test and if no go try the other direction. I've done a number of these and sometimes you get it straight...

Hi Picked up a 300 cheap but it seems to be dead no power led when 12v applied. Anybody know anything about fault finding these? Thanks

Has the board been recapped?

Have you checked every pin connection on the replaced memory chips and sounded them with multimeter?

Is the floppy drive you are working on the problem? It may be the cause of the Blown UJ11. Have you another computer you can test the floppy drives on?

This is probably a very good candidate for a reloaded board. Caymac?

+1 for Caymac Will knows them backards