- OMG! This has been plaguing me for weeks! I had my early 2008 trackpad go out and had to have the case replaced to fix it, and since it was returned (done by a Mac repair shop, not Apple) the bottom screen has done this though it never had before. Today it was too visible to ignore and not be depressed. The shop has insisted it was not due to anything they did but could offer no help other than to replace the screen. Restarts and even repairing permissions and clearing caches and resetting power management have not helped. The link to the Shift - Control - Eject was a godsend! It's back to normal!!! Thank you, Clement!!