Complex sentence: Even in cases where a system has been set up to be managed remotely, a local keyboard and video card may still be needed from time to time, for example to diagnose boot problems that occur before a remote access application is initialized.
Split into simpler sentences: Even in cases where a system has been set up to be managed remotely, a local keyboard and video card may still be needed from time to time. For example, diagnose boot problems that occur before a remote access application is initialized.