@david227156 try something like this
Power system checkout[br]
To verify a symptom, do the following:
* 1. Turn off the tablet.
* 2. Remove the internal battery
* 3. Attach the tablet to a ThinkPad Tablet Dock (hereafter referred to as the dock) and then connect the dock to an electrical outlet using the ***65 W*** ac power adapter shipped with the dock.
* 4. Check whether power is supplied when you turn on the tablet.
* 5. Turn off the tablet.
* 6. Disconnect the ac power adapter and detach the dock. Then install the internal battery.
* 7. Check whether the internal battery supplies power when you turn on the tablet.
Use the [document|35418] to work on it. Open it up and let's see what you got going on there. [guide|21499]