The question is incomplete, as it lacks a diagram of the topology and Router R1's table. I assume the user has access to both the topology and routing information.
The configuration below will assist in resolving the ACL issue:
Hosts within the 172.16.0.0/16 network should have unrestricted access to Server1, Server2, and Server3, which is currently not the case since L1 is unable to connect to Server2 or Server3.
The suggested configuration on Cisco Router R1 will rectify the ACL issues.
The correct answer to this query is "Hard drive." Explanation: Given the context of the inquiry, it's suggested that the most likely cause of this issue is the improper connection of the video cable. An incorrectly connected video cable can lead to display disruptions, such as the screen flashing black. While overheating of the GPU could also be a potential cause, it typically results in visual artifacts rather than shifting displays. Therefore, "Hard drive" is indeed the right answer.