I inherited this TV from a previous tenant, so it didn't come with a manual (for that matter, it didn't come with a remote. I had to buy one). Anyhow, I can no longer afford to pay for Cable TV. I'm looking into antennas. I can't seem to figure out if I need a digital converter for this TV...

I found the adjust convergence button on the front of the TV, and am able to move the red line in to cover the green. The blue button is set off about "an inch" and will not move inward. The blue horizontal will move. Is this something that can be accomplished by someone who can tear apart and...