Posted 05 December 2011 - 10:19 AM
My 3 year old Acer Extensa 5620Z laptop charger seemed to be malfunctioning - plug it in and sometimes it would switch to A/C sometimes it would not. Replaced it and new one worked for about a month. Now when you turn it on I first get beeping during start up (two beeps repeated over and over), then when Windows 7 loads the screen goes brighter then dimmer over and over. In additon, the power keeps alternating from a/c to battery every few seconds. After a few minutes I started hearing a buzzing sound coming from the charger. Didn't want to spend any more money on this laptop and then find out it's a hardware problem. I've been told by someone who knows more than I do that it's probably a circuitry problem and I should get my data off it fast - which I did. Does this sound plausible? any other ideas?