Why are there vertical blue lines and I cannot login
I have vertical blue lines on my monitor. When I restart I get the same thing and any text or graphics look blurry. This prevents me from logging on. I have tried rebooting using other modes explained online with no success. Any ideas on the issue?
Update (04/05/2021)
Is there a simple fix for a replacement part or is it time to just retire this computer? If it’s time for replacement, I’m totally fine (have backups from time machine) but before I get rid of it how do I best clean the computer of personal info before it gets recycled, since I cannot access any info right now?
Is this a good question?