I am having problems with my Gateway laptop. The laptop suddenly stops charging and won't start charging unless I put into sleep mode (Windows) or suspend(Ubuntu) or I shut it down. I have checked the power supply with a voltmeter and it reads 19V. I replaced the battery thinking it was the problem but it has not helped. I contacted Gateway and their Support Staff told me to install a Firmware update (which I had already installed.) I installed it again and had no success. This problem is very annoying, especially when I'm burning DVDs. Any suggestions on what else to try?