I guarantee that maintaining the cable lines, not to mention mounts and injuries resulting from those televisions means that the taxpayers do indeed pay a significant portion of the cost, if not more than what the prisoners pay.
Besides, why on earth would anyone want a prisoner to have a high value personal possession in a prison full of thieves?
Can you cite some facts and sources for your guarantee? The cable lines are maintained by the cable provider. The TVs in IL prisons are plastic framed flat screens, hardly can hurt someone. The TVs are marked as to ownership, and serial numbers recorded. If one went missing, I am pretty sure they could find it. The inmates have to have papers showing that they purchased/own the TVs. Where are your facts guaranteeing that taxpayers cover the costs?