Dell Latitude Service Tag

Hi!

I have replaced a defect mainboard with a used one and now i need to change the service tag back to original. System is dell E7440 LA-9591P. Is this possible only with kbc change?

 

[imranromi]

add svtag later ALT+F then warning error?if no ALT+F then fan max speed
View attachment 108833

This is your laptop battery problem not tag.You replace battery?

 

[ThienBui]

add svtag later ALT+F then warning error?if no ALT+F then fan max speed
View attachment 108833

What happened before?