Apple II

I have an non enhanced apple IIe that was working great just a few hours ago. I was making copies of disks and had no issues what so ever. I turned it off for a few hours... and just a few minutes ago turned it on to find a garbled screen:

Hi guys,

Been recently trying to also resurrect an Apple II+ from years gone by, and am stuck on the Keyboard.

Anyone have suggestions?

When I type various random keys like 12345 or QWERTY or 67890, I sometimes get the letter M in the mix. Happens randomly (once in a while) and doesn't matter the keys I hit. In addition, I do get a few "double" key hits on the letter T. Not sure if this is related or not.

Originally I had 14+ keys which didn't work at all, so I took the whole thing apart (see pictures) and did a solid cleaning. Now just the M key remains with problems (and the T) so I am close.

How do you troubleshoot? This model keyboard is not the older style switch type, is it even possible to use a multi-meter to test leads coming off the keyboard PCB? or should I test it at the encoder?

Most people have good examples of how to deal with older style keyboards, just not this type.

Any suggestions would be great.

Is this a keyboard problem or encoder?

I am excited to get this Apple II working, but the keyboard has frustrated me.

David

Places to look for Apple II systems other than eBay?

Where have you found them before?

Is eBay overall the best place?

This might be a dumb question, but I was wondering if there is a Proterm emulator for Windows? I guess it would actually be a telnet client that emulates Proterm display. Does that make sense? One would use it to connect via telnet to an Apple board and use Proterm screen control for display.