Displays blank white screen on power on, sometimes allowing the start up/safe mode configuration screen to come through for a few seconds before fading back out to white. Does not work with external monitor. No accompanying beeps or sounds, just the white screen. Sometimes a horizontal line shows up too.
Just attempted to reboot with main battery out and just plugged in to power source, this allowed me to start up system normally. Currently scanning for issues and going to do a system restore.
What is going on/ how can I fix? I have almost no computer knowledge whatsoever.
Thank you for your help!