I am experiencing the same right hinge issue with my 5558
I just spent nearly 2 hours today attempting to get my 5558 Inspiron repaired under warranty for a broken right hinge that also screwed up my WiFi. Who do I contact to get this issue covered and cost me 160 dollars? This is amazing everyone with exactly the same problem on the right hinge, not the left even.
And then to be accused of abusing my machine, when it never actually moves from its location. The only thing I do is open and close the<ADMIN NOTE: Profanity removed as per TOU>lid ! I always had a trust in Dell products and they're quality. Well that's now out the door.