Give the string and cables a good going over.Look them over really well, especially around the cams and the peep sight. Check for fraying. Some serving seperation at the cam is acceptable, but if you see a little 'puffball' looking thing at a seperation, that means it's about to break and the string and cables should be replaced. If the string and cables are more than a year old, 2 years at the very most, they should be replaced. If you can't find out how old they are, it'd be a good idea to go ahead and replace them. Just for insurance and peace of mind.
Look for gaps between thewheels and spacers along the axles. Shouldn't be any.
Draw the bow and look at the wheels while holding it back. Make sure the ends of the limbs are level and the cams aren't leaning badly.
Take a cotton ball and run it along the corners of each limb, bottom to top. If it snags anywhere, check that spot out closely. It might only be a chip in the coating or it could be a small crack. Chips okay. Cracks not okay.
When drawing the bow, listen for any creaks, cracks or pops. If you hear any, it's likely to just mean it needs to be taken apart, cleaned and lubed. But it could also mean something more sinister. It's a definite tip-off on how well the bow has been maintained.
Go on the Hoyt website and look up the technical data for the CyberTec. Well, here's the link to the '03 CyberTec:
http://www.hoyt.com/customer_service/hoyt_tune_charts.php?page=03_cybertec.phpCheck the measurements against the specs to make sure everything is as it should be. If it's way off, say more than an inch in axle to axle length or a half inch in brace height, it's another tip-off that the string and cables probably need replacing. They would certainly need to be adjusted.
That's about all the inspection you can do without tearing the bow down. Only other thing is to find out how it shoots for you.