I have an Acer Aspire 5742-7653. My computer has trouble charging. I have already replaced my power cord once because it stopped working, and on replacement it seemed to work normally again for a bit. However, now the power light blinks blue and does not charge. Sometimes it charges normally (which is how I can post this), but it is quite often that it is blinking.
Also, not sure if this is related or not, but it seems to overheat sometimes, even with a cooling pad (maybe the pad isn't good enough). Maybe the power supply powering one of the fans isn't working?
Anyway, not sure if you need any additional information.