Pretty sure they are SMD on most A4K motherboards. A few people have had them replaced and had sockets added in the past. You'll have to check your particular board. On some models of A2K there's an inline fuse as I recall that can sometimes act up, not sure if this exists on the 4000's, as well, or not?
Also do the obvious - check for battery damage to any traces, bent pins inside the connector, loose solder joint at the connector, etc.