Hi All
Update for the last week or so; re-soldered the P1(?) analog board connector and crimped the connections in the plug and all display issues are sorted. :beige:
Moved on to getting an OS installed.
First USB floppy drive from Amazon had a faulty write protect sensor so wouldn't write floppies :wacko:
Got 2nd USB floppy drive and using images from
https://www.classic-computers.org.nz/blog/2011-12-29-disk-from-images-mac.htm I got an os to boot, but wouldn't see the scsi hdd to install on.
Using a PCI SCSI card in a PC, I tried to install via Linux/Basilisk (detailed here:
http://www.instructables.com/id/Install-system-70-software-on-a-classic-mac-using/ ) but the scsi drive seemed to 'sleep' and disappear. Read this could be a capacitor issue, so recapped the drive board, no change. Then noticed the drive wasn't spinning up at all on power on, opened drive and spindle was stuck.
However, after all this, the drive still refused to show in OS7 and think it's finally died as the heads no longer move :-(
At least everything else now works. Just need to find a SCSI drive, or invest in a SCSI2SD .....