UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Sharp MZ-80K help needed on repair

pudwink · 4th Sep 2021, 11:29 am

Hi All
I have a Sharp MZ-80K which when turned on I only get vertical lines that move from side to side.
I checked the voltages from the power supply and the 12v was giving out 19v so replaced a few capacitors and back to 12v but still the lines so looking at the board and the socketed ICs had some corrosion so I have replaced the sockets and put in a brand new Z80 CPU but still exactly the same if anyone has any ideas out there what to try next I would be very grateful.
Here is a link for a video of what the computer is doing
https://youtu.be/1CaQtj-JQvE
But ignore the flashing that is how my phone has took it.

4th Sep 2021, 11:29 am	#1
pudwink Pentode Join Date: Jan 2011 Location: Nottingham, Notts. UK. Posts: 207	Sharp MZ-80K help needed on repair Hi All I have a Sharp MZ-80K which when turned on I only get vertical lines that move from side to side. I checked the voltages from the power supply and the 12v was giving out 19v so replaced a few capacitors and back to 12v but still the lines so looking at the board and the socketed ICs had some corrosion so I have replaced the sockets and put in a brand new Z80 CPU but still exactly the same if anyone has any ideas out there what to try next I would be very grateful. Here is a link for a video of what the computer is doing https://youtu.be/1CaQtj-JQvE But ignore the flashing that is how my phone has took it.