I am wondering if anyone has anything charging from the usb port on the charger?
i have been able to use my charger for about 2 weeks now, the last couple of nights i have been plugging my headphones into the usb port on the power supply to charge while performing downloads on my surface. i have the power settings to while plugged in set to never and 20 on battery, i would wake each morning to find that the power supply did not work and my system had gone into hibernate. the usb charge port and the power going to the surface was gone and would only be restored by disconnecting the power from the outlet, waiting a few seconds, and plugging it back in. i also noticed that the power supply would get warm just charging the surface and get hot with the headphones plugged in. also the charger is 65w which is the exact same wattage as the most power efficient processors on the market. and there isnt any holes for cooling on the power supply. some people are complaining about degradation of performance after only a half a year of use.
i can only deduce that the power supply is either under wattage for the load an average user puts on it or there is inadequate cooling for the power supply leading to degradation of the components inside.
the only solutions i can think of would be to add heat sink fins to the outside of the power supply to aid in cooling or find a larger wattage power supply with active cooling.
do not modify the power supply yourself as it would void the warranty and could damage components.