i have an older deh-p6000r that i bought new a while ago, a couple years later i'm driving down the road and the whole faceplate will go right out and still play audio, well i turned the key off and the thing was still playing! and it seems while pressing buttons the display will "lock up" just wondering if anyone had this problem or know what it might be, aside from this the stereo is mint and way better then the factory delco

 

Could be bad connection to the faceplate, but more then likely it the ribbon cable to the faceplate. Vary common and the symptoms sound right.

 

i had a dirt cheap 20W kenwood have almost the SAME issue as you are having, i cleaned the contacts on the HU and faceplate with a q-tip/ cotton swab and rubbing alcohol. for the realy grimed up ones i used a pencil eraser. good as new for about six months, then i had to do it agai, eventualy sold it with the piece of crap car it was in...

 

yeah i was thinking that ribbon cable, it's like if you move the face around a bit you can get it to do it, i cleaned the contacts and stuff

 

Ribbon cable is vary common in that model.