DIY Overheating Tablet Power Supply Replacement

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[Dave] posseses an ASUS tablet PC that has a minor issue. The unit is charged using the docking connector’s USB cable when connected to a special wall transformer. The issue is that the wall unit has a tendency to overheat, and is shut down by a thermister inside to prevent permanent damage. The word on the net is to drop it inside a zipper bag and chill it in the freezer for a moment. Though this is effective, it’s definitely not the long term remedy that he wanted. Instead, he hit the parts bin and created his very own power supply replacement without having to purchase anything at all.

The unit is actually looking for 12V on the power pin (pin 1) of the USB cable. [Dave] searched for old AC adapters then came across one that match the voltage and also actual specs of the stock device. He as well got a dirty outdated motherboard and then plucked the USB ports away from the back. A bit of protoboard produces an excellent base to attach the AC adapter cables to the ports, which was then protected with one huge shrink tube. The actual result can be seen above, as well as showcased in the video clip.

ORIGINAL ARTICLE: http://hackaday.com/2012/01/13/replacing-an-overheating-tablet-power-supply/