PlayStation 2 slim is showing blank screen, but it’s powered on and the RCA cords are correct

Hi!

I bought a used ps2 slim for my husband for Christmas for the nostalgia via eBay and he can’t wait! The seller had great ratings, and it is supposed to work.

When we plug it all in, (the tv has correct RCA inputs) the power lights up green, and the blue light comes on. We have it on the correct input.

But nothing is happening on the tv. It is a blank screen.

No audio, no visuals.

Any ideas?