English Community

ThinkPad NotebooksThinkPad: T400 / T500 and newer T series Laptops
All Forum Topics

4 Posts



5 Signins

99 Page Views

  • Posts: 4
  • Registered: ‎11-27-2019
  • Location: IT
  • Views: 99
  • Message 1 of 1

T590 - new AC Adapter causes touchpad to lag

2019-12-06, 15:13 PM


I've had this problem for a while now, where apparently randomly the touchpad would start working slow.

Movement would overall seem slower, and it would more often than not miss taps, so to click reliably i would have to use the physical buttons.

I tried messing with bios power settings but they would bring no change.

The problem only happens when plugged in with an AC adapter, one i bought on amazon to bring with me while working, while the original one that came with the laptop i'd leave at home.

I haven't noticed any other difference from normal behavior, other than the touchpad lag.

The one I bought is *supposedly* original, from Lenovo's amazon page, but has a different model ID from the one in the laptop packaging.



Here are the infos on both adapters:

AC Adapter from amazon (CAUSES THE PROBLEM):
LENOVO PN:  SA10M13950      FRU PN: 01FR026
INPUT:      100-240V~1.8A 50-60Hz
OUTPUT:     20V--3.25A/15V--3A/9V--2A/5V--2A

MFG DATE:2019/09

Original one (DOESN'T cause the problem):
LENOVO PN:  SA10R16870      FRU PN: 02DL124
INPUT:      100-240V~1.8A 50-60Hz
OUTPUT:     20V--3.25A/15V--3A/9V--2A/5V--2A

MFG DATE: 2019.10



Anyone has any idea why that may be / if it can be fixed / if it seems like the new adapter is somehow defective / if it might come down to a bios update?

I dont really know enough about hardware to correlate a different adapter to a touchpad problem, so any idea is welcome.

Other than the obvious "get a new adapter with the same model this time", which i'd rather avoid if possible.


Thanks for any help.

Forum Home

Community Guidelines

Please review our Guidelines before posting.

Learn More

Check out current deals!

Go Shop