Yeah, that's an IEC C13/C14 connector (usually just IEC). You'll sometimes hear them called "kettle leads", which is actually something different. Easy to pick up in any kind of electricals or hardware shop.

No idea what that audio DC connector is for, though. Speaker power, I assume.

>>935307
I suspect the DC connector is an output to power a set of speakers that were originally bundled with the monitor.

>>935307
- dell soundbar connector - yup, speakers, basically. DO NOT CONNECT POWER TO BOTH THIS AND MAIN SOCKET OP!

Actually pretty shoddy marked, desu. But, Power 3-pin 100-240v, cable in first socket, done.

>>935316
This. DC connector is an output, don't plug a power cord into it.

>>935303
This is very clearly a non standard power port. Its installed upside down

>>935303
if you don't know what connector that is, you've never connected any pc and so you're certainly not able to repair that thing.