So... I just bought an AV2HDMI converter plus an HDMI cable to make my Super Famicom work on an LCD TV without composite ports.
But when I connected everything and set my TV to the HDMI "channel" no image appeared at all. I have two LCD TV's and I tested the stuff on both of them, but none of the two worked. One of the TV's even have 3 HDMI "channels" and I tested all of them but no success.
That's how my converter looks like, I just took this photo with my phone:

The three Red/White/Yellow cables are from my SFC, and the black cable is the HDMI one. The other end is connected to my TV.
I'd like some help with this because I'm almost sure I'm doing everything right but things didn't work. What did I do wrong?