Spot display anomalies 49
Every now and then a transistor on your Mac’s display may fail, causing a small area either to go dark or stay bright. Sometimes display issues are caused by a foreign object such as dust particles getting behind the screen. If you have display issues, clean your screen with a dry cloth and perform an NVRAM reset – see how at bit.ly/
resetnvram. If this fails to fix it, visit your local Apple Store for advice.