I have recently encountered the same problem with some HP and Toshiba laptops which I bought. This appears to be a common problem, especially with replacement adapters, judging by the number of posts on the net. Just make sure the aluminum sheet only touches ground and no any other circutry connection. The adapter does not afect the touchpad anymore. This creates a permanent grouding surface that can be touched by hand or my lap. Finally, I secured the edges with etectric tape. Then I bend the aluminum sheet to have an exposed sueface outside.
Then I managed to open one of the plastic covers at the bottom of the labtop, and secure the aluminum sheet with one screw inside the cover. I used a piece of thicker aluminum foil from a sealer of a ground coffe container. So I desided to have a better ground connection somewhere outside the laptop. Also, I did the RF interference test explained in other posts, and found no interference caused by the power adapter.įinally, I followed the pevious post to eliminate the capacitance charge touching the ground metal of the labtop, and the touchpad control improved a little. I checked the voltage with a multimeter, and it was in range. jumping, erratic, etc) in two of my laptops due to a power adapter. Recently, I discovered touchpad malfunction (i.e.
