My ps1 turns on but then it doesn’t do anything

I bought a ps1 the other day. The AV cable was slightly rusted and bit bent so I had to use pliars to bend it back into place. After that, the AV cable fit perfectly but I fear that the cable might not be working. I’m using a digital plasma tv, that has the yellow-red-white connector slots, but it doesn’t seem to be working. The power cable is working fine, and the ps1 power button turns green so that part is fine. But how do I know what the true problem is? I put a disc in and the disc plate doesn’t spin, and the tv doesn’t even show the Sony logo.

Do you guys think it might be just the AV cable?