One of the speakers (left) on my VAIO laptop makes a distorted buzzing/crackling noise instead of a sound. This started after a water spill and a subsequent disassembly (to dry up) and reassembly of the laptop. Importantly, I couldn't find screw-holes for two unique non-cover screws. Everything else works perfectly so far.
Is it water damage, a result of the extra screws mystery, or perhaps a result of misplacing something else, or damaging/forgetting to plug in a connection during reassembly?
Water leak and recovery Details:
I spilled about half a glass of water, some of which probably leaked inside through the keyboard. I rushed to grab some napkins--instead of shutting down immediately. The laptop had shut down by itself 1 minute later. I pushed the power button back on, but immediately changed my mind and shut it right back off (while it was trying to boot) after 5 seconds. Following advice on many other forums, I partially disassembled the laptop and let it dry for about two and a half days. Items removed were: battery, RAM, HDD, BD-ROM, bottom cover, top speakers/media cover, plastic keyboard cover (the keyboard itself was moved out, but not disconnected). I could hardly see any moisture inside. Don't remember any on the motherboard or other circuit boards. Regardless, the components were let to dry for 2.5 days. Not sure if it was a good idea, but at one point, I pointed a blow-drier for a few minutes on all components. After I reassembled everything, I had 2 screws left-over from something inside. I remember not being able to find matching screw-holes for those two, despite looking for very long). The computer booted up and has been working perfectly (except for the left speaker).
Laptop and System:
Sony VAIO VGN-FW290F
Windows 10 Pro
Realtek High Definition Audio is usually the default sound driver.
(Recent changes: Right before the leak I had installed Sid Meier's Civilization III. Also, I've connected two new hard drives (one before the leak, on after) via USB port.)