Hey guys, first post here and unfortunately it's b/c of this same problem I'm having... My OG power button quit me, then I got a DX off a friend (not buying new until prime/nexus), and 2 days later this problem started. Mine is a bit worse though - the back button will do the same, bring up the vol, but after 5Xs or so, it completely stops working, along with the lower volume key! If it sits for a while, like over night, sometimes it starts working again, but never for long.
Anyway, just wondering if any of you had luck getting it repaired or if you were able to replace the ribbon yourself? Mine is definitely not under warranty, so I'm curious as to what it would cost to repair... Maybe its cheap b/c it's a known issue??? Trying to think optimistically here... Thanks