I´ve just finish my first panel, when I turn it on half of the leds stay full illuminated and the other half are completely off regardless of what the IR sensors detect. Any ideas on what might have happened?

Thanks

Depends on the pattern that you're seeing.

If each quadrant looks identical, with every other LED on all over the board, then it's likely that you have a problem at R115 and/or R116-- check the value and soldering of those two resistors, as well as the chip that they are near.

If it's otherwise, perhaps you could describe what you're seeing more closely.