2003 9-3 control panel display not working (blank). Your thoughts. Thanks Joe

Check fuses. Something may have gotten wet and shorted.

Did they shampooed the carpet any, ok try this, take both battery terminal off, now place the both of them together for 10 seaconds, refit both & check if display returns, note by doing this u r just resetting all the vehicle computers, this will not harm anything what so ever, post back after please it this helped or not.

Ok there is your problem right there, take notice to the radio amp under the LH FRONT seat, if wet will take radio function & display out, would recommend u take seat out & remove amp & blow dry out before further damage takes place, good luck.