Acer Deterioration Specifically Sound

I have noticed that my Acer 6920 (which just past it's 3rd birthday) has fallen apart pretty quickly. Now I admit I am pretty abusive when it comes to computers, laptops especially, but none more so than most people. This thing so far has:
A non-functioning fingerprint scanner
No working on board audio (sound and mic are not detected or used... even the HDMI can't output sound)
The CD tray cover (the plastic bit) fell off after a year
Screws fall out of the bottom cover (im down to 2)
The heat management is wacky (my GPU averages 59C which is about 10C hotter than it originally did, even after i replaced the thermal compound)
The fan works half of the time
Keys get loose sometimes
and more but you get my point...
Most of these I'm fine with, but I need my sound to work as I use the computer for lots of audio recording and editing (right now I run through a bulky external usb sound card which has latency issues and other such). I guess you could consider this a bump for an old post I did, but the issue went unresolved.
I've updated drivers, chipsets, even flash the BIOS and still no dice. The warranty is gone so repairing it would cost a pretty penny, and then I might as well get a new laptop, but I'm trying to save money here...
Almost forgot to add that I have, under Device Manager, an entry in Port_#0002.Hub_#0002 but this seems to just be a usb port (as the parent is listed as usb\root_hub) but at this point anything at all might be helpful.
Any help or ideas? (DXDiag is attached)

Thanks very much for your time.

 

This may be a stupid suggestion, but there is a Realtek driver listed for the 6920G. Have you tried installing that?

 

Since you're running Windows 7, I'm guessing you did an upgrade from the 6920G's Vista installation.

1. Fingerprint reader - Do you have the latest version of the ABIG software that runs it?
2. Audio - install the Realtek drivers from Acer's website. If the Windows 7 version doesn't work, install the Vista one in compatibility mode.
3. Screws - Don't worry about it too much: the bottom cover has tabs that will keep it held in place even without screws.
4. Heat - Keep in mind that the GPU and CPU share a heatpipe, so heat from one can cause the other to warm up a bit. Also take into account ambient heat and such. 59 Celsius is nothing to worry about.

Other than that, I'm absolutely stumped. Sorry!

 

Thanks for the suggestions, but I've tried every (yes EVERY.) single driver that Realtek has, for all systems and they install fine but they just don't detect hardware which is just further convincing me that it's hardware... The rest of the stuff I can live with, but out of curiosity would anyone know what the heat threshold of the 6920 is with stock cooling?

 

What do you mean - how hot the CPU is allowed to get, or the operating environment temperatures?

 

The general temp when the cpu throttles/max allowed, the gpu does the same, or when it forces a hard shutdown (which i noticed it does if the gpu got too hot)

 

The CPU throttles around 50 due to a 6920G-specific glitch, but should closer to 90. Its shutdown temp is around 100.
The GPU throttles in the high 90s, and forces a shutdown above 100.