the lenovo t550 only charges when it is turned off

[user000110002]

MB number: Wistron LSZ-1 MB 13251-1
Problem: lenovo t550 only charges when it is turned off, connecting the power adapter to a laptop that is turned on does not give anything, the laptop does not show the charging icon. When the laptop is turned off, it charges without any problem.

 

[Admin]

MB number: Wistron LSZ-1 MB 13251-1
Problem: lenovo t550 only charges when it is turned off, connecting the power adapter to a laptop that is turned on does not give anything, the laptop does not show the charging icon. When the laptop is turned off, it charges without any problem.

can you check this voltage on Q7308 when laptop is on and off
KBC1_D3 = !
check D7301 is good or not ! same for C7311 R7307 C7318 .