Yes, thats what I've been trying to tell everyone. The DC Jack is the MAIN CULPRIT in the cases of pins breaking. The heat loosens up the metal making it easy to bend and with that stress/friction and gravity, the pin ultimately breaks.
When I first got my G53, the jack was so freaking hard to push in + it used to get really hot after some intensive gaming. After some days I got the flickering screen changing to different power modes, ultimately, since I was all paranoid and all, I didn't try to use it.
I took it to the ASUS service centre and they gave me a new jack. The new jack fits in very snug with not much resistance and whenever I'm playing crysis or something, the power jack doesn't get hot anymore.
I think this issue started at manufacture level, I guess some chargers DC jacks were pretty faulty. I think ASUS fixed this issue with the HEXAGONAL PIN everyone is reporting about.
I just checked my jack and its not the round pin, its hexagonal so yay ;D !!
Asus G53sw-A1
Intel i7 2630qm
Memory 8 GB
Nvidia GeForce GTX 460m 1.5 GB
Windows 7 Premium
1 TB HDD @ 7200 rpm
4x Blu-Ray
Razer Mamba, Razer Abysus, Rog Gaming Mouse.
FPS GAMER.