If the wall jacks are using the more standard wire colors you have the brown and orange pairs swapped.
Cat5e wall jack not working.
The cables are not terminated or connected to a switch thus all of the additional wall jacks are a dead end.
The plastic jacket is suppose to be crimped inside the jack it help prevent the wires from being pulled loose.
If you think of a as a chain made up of series of links it will help you better visualize and understand the possible points of failure.
Each jack should have a cable that is running to a central location.
It also appears these cable were terminated by someone who does not do it often.
Seeing it s an apartment i d contact your property management company and or speak to.
Troubleshooting a cat 6 or cat 5 network connection from the network switch to the data outlet and or computer can sometimes be very frustrating even for an experienced professional.
How to troubleshoot wired cat 5 cat 6 etc network connections.
The cables that are inside the walls have to go some where and be connected to something in order for them to work.
You should have one pair on pins 1 and 2 another on pins 3 and 6 another on pins 4 and 5 and the last on pins 7 and 8.
The cat5 wall jacks are just like the power outlets in your house.