try this mod
If anyone with a disconnecting dock doesn't mind helping me test a possible fix for the disconnection issue, I may be able to help. anyone with disconnecting dock, take your dock for the tf701 and check for play of the dock to tablet connector on the dock (forward and backward, just nudge LIGHTLY with a small screwdriver). If the connector has some wiggle, maybe a millimeter or so, try it with the tablet, you will probably not have any disconnection issue. If there is no wiggle, loosen the two screws that hold the dock connector down in 1/8th turn increments equally until there is some wiggle, then try with your dock. If that works, let me know and we can continue monitoring the function of our docks to ensure that the issue is fixed and that no other related problems arise. I believe I may be on to something with this and would very much appreciate the additional test case.
I had a dock with the disconnect issue and for fear of damaging the tablet connector, set the dock to the side and requested a replacement. I tried this fix on that dock and it worked, disconnect issue resolved. unfortunately I had already requested my return so I used it a day or two (rigorously) and had no issues, but went ahead and sent it back. would have been nice to hold on to the working dock, but in the name of progress, I decided to go forward with sending it back, and if the next one I get has the same issue, I will use it as another test case to back up a potential fix for this issue.