If any of these settings is out of range unexpected results can occur. If possible, delete old files first. If a SCSI device is bad or if more than one SCSI device is set to the same ID, errors can occur. Disconnect all SCSI devices if problem persists. Too many fonts or corrupt fonts can cause very strange problems.
Commercial utilities exist that check font integrity.
If your hard drive is full or almost full your Mac may have errors and may not even print. This will give you a reading of bytes free. If you are having crashes or freezes you may be low on memory. Go to the finder. This will tell you the largest unused block of memory.