well, it's not difficult to look for updated audio driver, and install it.
Driver Downloads
Original Manufactor Model#: JHL90
Click here to download driver
http://ftp.compal.com/asp/driver_dnd/e_ ... T0x/Driver
you could burn a Linux LiveCD and boot into it, see if you automatically pick up the linux audio drivers, and see if it works in that environment.
YOu can download drivesweeper and check your drivers, if up to date.
It's possible you broke the jack,
It's possible your external mic is broken,
It's possible the internal mic cable, if the mic is on the screen panel, got pinched in the hinge and causing a short. Probably not the case.
check the mic on any other device you can,
open "Sound recorder" in win7 and record a file and save it. At least you'll know what static other people are hearing.
So many possibilities, non of which are hard to diagnose in front of PC, but really tough to do from afar.
With drivesweeper you can back up your audio drivers, then install your new drivers, . If anything gets worse, you can then open drivesweeper again and revert to old drivers.
You could actually save your drivers in drivesweeper, uninstall the built in Mic from Device Manager, then reboot. See what that does.
If no good effect, reinstall built in mic, then uninstall your other audio component. reboot.
See if it fixes, If no good effect, reinstall.
After doing that, you'll basically eliminate a software/drivers issue, which leaves a broken piece of hardware, you might have yanked the mic connector out of it's solder. It's a DIY repair or find a techie type with a small solder iron and a light touch to open the case without breaking the plastic tabs that hold the laptop case together. iBUyPower might have a service manual available to guide you through disassembly.