Elements of use case diagram: Actor. â¢ Actor is someone interacting with use case. (system function). Named by noun. â¢ Similar to the concept of user, but. a user can play different roles; (example: a prof. can be instructor and. researcher â plays 2 roles with two systems). â¢ Actor triggers use case. â¢ Actor has responsibility toward the system (inputs), and Actor have expectations from the system (outputs).
Related Manuals for Lenovo Laptop. Summary of Contents for Lenovo Laptop. Page 1: User Guide Lenovo User Guide Read the safety notices and important tips in the included manuals before using your computer. Page 2 Notes â¢ Before using the product, be sure to read Lenovo Safety and General Information Guide first.
External battery pack not working with laptop. I have an HP ProBook 4540s that has a very weak battery from years of use and abuse. I bought an external battery pack, a Poweradd 32000mAh with the intention of using it with my laptop. The battery works just fine when I use it to power a Lenovo IdeaCentre Q190. The voltage required by the Lenovo IdeaCentre is 19V, and my HP ProBook requires 19.5V.