Sounds like the horizontal synch has failed.
Check test points 13 to 21 on the video board with an oscilloscope, ( see page 40 of the MZ80K Service Manual) and compare with traces on pages 19/20.
MZ 80K repair project
Re: MZ 80K repair project
Not at all; thank you for your support so far. Very much appreciated
I don't currently have one and have never used one... , but am very intrigued to give it a go!
Do you think this would this be an appropriate purchase?
https://www.amazon.co.uk/Digital-Oscill ... 6286376031
Re: MZ 80K repair project
I have this one ; https://www.amazon.fr/Hantek-oscillosco ... 700&sr=8-5
You can have up to two analogical signals and up to 16 digital signals recorded through USB on your PC and displayed on you PC screen.
You can have up to two analogical signals and up to 16 digital signals recorded through USB on your PC and displayed on you PC screen.
Re: MZ 80K repair project
Sorry the previous one is WITHOUT 16 digital signals. The right one with 16 digital signals is https://www.amazon.fr/Hantek-6022BE-Osc ... =hi&sr=1-4
Re: MZ 80K repair project
Have you made any strides ?