Dell :: My E1705 Dying

I'm coming up on the end of my 1-year warranty, and quite a few things have started to fail on my beloved E1705, so I thought I'd make sure I know exactly what's up before I call Dell -- the last (and only) time I called them to get something (a keyboard) replaced, I was on the phone for hours. As I need quite a lot more replaced than a $50 keyboard, I'm a bit nervous.

First of all, I think my GPU's (256MB 7900GS) failing.

(I'll replace these if they're way too big -- native resolution, and I 'unno if notebookforums has a thumbnail system)

From what I've been able to gather, that would be the vRAM going bad? Points on the screen connecting to other random points and stretching the texture to get there. Also, on top of that, I get a lot of snow in loading screens, and stuck pixels (usually red) when the GPU's warmed up -- usually ~50-65C (under load). I've also noticed a performance decline, getting about half the FPS in most situations I did compared to when the PC was new (and yes, it's still clean, the HDD is pretty much empty, defragmented, drivers up to date).

Also, the main problem, is I often get the NMI Parity Error: Hardware Malfunction when playing games. It used to be 2-3 times a day when the problem first presented itself, now it's within 5-10 minutes of starting a game, rendering them unplayable. I think this'd also be the GPU?

M'kay, so on top of that, I think there's something going on with my sound port. One day my speakers just stopped working. I thought I'd messed up the drivers or software or something, but headphones worked fine. I came across an old post about the motherboard on this notebook, and it was mentioned that if one applied pressure to the headphone jack (which the headphones were unplugged), the speakers would begin to work. Sure enough, that's the case -- press on the headphone jack and audio comes through the internal speakers. So that means the port's starting to come loose? It seems like I would need to get the entire motherboard replaced?