Hi all - I'm out of options and am hoping for a small miracle. I have an Asus TF300T. The keyboard docking station charges fine, but the tablet will not. Here's what I've tried so far. 1. Plug in charger to docking station, docking station charges and light on dock is on. 2. Dock tablet to docking station, tablet does not charge, no light at the power button on tablet 3. Plug charger into tablet alone, tablet does not charge and no light at the power button on tablet 4. Replaced the battery. With the new battery, the tablet boots up, but as soon as I plug in the charger into the tablet, the screen goes black and tablet shuts off. 5. Replaced the charging port / 'flat circuit cable' in the tablet. Made no difference, same behavior. Is there anything else I could try before exploring replacing the motherboard? Thanks!