Laptop speakers buzzing and humming when on BATTERY power, more errors as well...
Posted on 2007-11-29
I have a Sony PCG-8L1L Laptop here at work.
When the user first brought the PC in, it was getting a weird flickering on the LCD screen that was flashing white and black horizontal lines through the screen then the PC would shut down. I took the battery out, and put the battery back in and it booted up but the lines persisted. I proceeded to plug the LCD into an external display and the lines continued on the LCD screen but not the external. I decided there must be a loose connection inside the case, while I was documenting the white and black lines completely disappeared and I have been unable to recreate the error. It seems that when I plugged an external display into the VGA the error has stopped? Any thoughts?
Well, after trying to recreate the error time after time, I removed the AC power and the laptop's speakers started to buzz and hum. I have seen this happen when AC power is in, but never when powered by battery. As soon as I plug the AC power back in, the noise stops. Any thoughts?
I am thinking there may be some interference coming from some type of electrical source that is causing the speakers and LCD monitor to glitch out and buzz and hum. I am going to take the notebook apart today, but I was wondering if anyone has had any issues similar to this?