2000xl problem with the pads

I have a second hand 2000xl, and the pads seem to have lost their sensitivity. Using padchk, a firm strike on any of them maxes out around 60-70, needs a heavy bang to get to the 80-90 range. I'm worried and curious about this, the pads work fine on full level but I just need the velocity especially for drums, I don't want to have to reprogram every single note after sequencing it's too tedious. Does this simply mean the pads/sensors are old and worn out? What options do I have to solve this? Can anyone help me out, would really appreciate any ideas or info about this. Thanks.

Check out MPC Stuff.com they have pad sensors and replacement pads. If anything I would check the pad sensor connection to make sure is fully connected.

Good lookin man, I noticed that the pad set on mpcstuff have a hole in the center, but mine doesn't, is there any difference at all between the two?

To be honest, I don't think so, Im guessing its just something you use to align the sensor to the machine. I don't know tho

Well I checked out the sensors on it, and apparently the ribbon which connects the sensors to the board has burnet conductors, more than 70% of them are brown/brown-ish. Guess I was right to have ordered a set from mpcstuff. Thanks for the help.