I am new to this site and this is my first post. I recently purchased an early Apple II+ from the estate of its original owner (motherboard date code is 7934). I am trying to sort out a number of issues to get it back up and running.
1) The computer did not boot at first (horizontal lines, no text). After removing all cards and all but the first bank of RAM and removing, cleaning and reseating most of the chips on the motherboard, it now boots up into Applesoft but I see moving vertical bars and text has fringes of orange/blue or green/purple (see photos). I have tried running the video output to an LCD TV and through a composite-HDMI converter to an LCD monitor and I get the same results. Is this normal or is there some adjustment that can be made? Is it possibly a sign of a failing power supply?
2) I have been able to put back all of the memory and reinstalled the 16K language card and the disk II controller and drive. The computer came with a DOS 3.2 master and a bunch of unlabeled diskettes. The drive does not seem to read anything. I tried loading an image from Apple II Disk Server but the drive makes a BLAT sound (that I remember was a bad sign) and I get a disk error. The inside of the Disk II appears to be clean. The head mechanism moves freely and there is no gunk on the head. Is this indicative of a problem with the drive/controller or expired media? The diskettes I have are not labeled so I am not sure if they are DSDD or DSHD. Can the Apple II read/write DSHD disks?
3) On a few occasions, the display has suddenly disappeared and the only way to get the computer back up is to unplug and re-plug the power supply from the motherboard . Is this a sign of power supply issues or something else?
Thanks for your help and happy holidays!