As I stated above, you're actually dealing with a Many-to-Many relationship here. As a result, you're going to need a "crosswalk" table. Here's how you would set it up:
1) TV table will have TVID (Primary key, unique), TV Name, Quantity, Manufacturer, etc...
2) Accessory table will have AccessoryID (Primary key, unique), Accessory Name, Quantity, Manufacturer, etc...
3) Crosswalk table will have TVID and AccessoryID with no Primary key. You enter in every TVID and AccessoryID combination you can possibly have in here. Example:
TVID AccessoryID
12345 666
12345 777
12345 888
55555 777
55555 888
Say 12345 is TV1 and 55555 is TV 2. Now you know TV1 can use Accessory numbers 666, 777 and 888, while TV2 can use Accessory numbers 777 and 888.
One-To-Many from the TV table to the Crosswalk table. One-to-Many from the Accessory table to the Crosswalk table.
Boo-YAH! That should solve your problems. If you can't figure out how to get your queries working after that, let me know and I'll see if I can guide you the rest of the way.