New member. I have a Toshiba laptop with recent pink or magenta display at times, and intermittent flicker and on/off display of LCD screen at a rapid flash rate. Is position-independent: this happens at rest without moving the laptop or changing the angle of the opened laptop screen. I connected an external monitor and the monitor display is perfect. If I power down the laptop, I am good to go for a an hour or so until the flicker/on-off screen display begins. This happens on battery and with the power adapter. Since the external monitor displays perfectly, have I eliminated the graphics card and MOBO? Is the next step to check for the LCD connection ribbon? The display lighting is fine, and the computer display does not turn black.
Thoughts on troubleshooting based on above? No malware and the default 60 Hz rate cannot be changed. Drivers are up to date.