I checked everything, my sp does play sounds,it normally plays recorded patterns and when a pattern plays, the pads do lit.

When i press the FUNCTION key, the only think that lit is the first pad (PART SEL) but i cannot have access to any other function because when i press the pad it does not respond.
Same think i tried to sample something to test, i selected a pad bank that already had some sounds, and i had to choose a pad to record the sample, i pressed all the pads that lit, and none of them could be selected.

I checked everything in the manual and in this forum, but i cannot find the answer.

Is it something that i caused by accident or is there a problem with the pads?

I think you'll have to set it to Note again, as it's in Part selection mode.

Pressing 'function' and 'pad 5' should fix it.

Haven't controlled a SP-606 in a while though.