If everything else at home is fast but your PS5 is slow, I would narrow down the symptom before paying for a repair. A slow download, lag during a match and a connection that drops are different problems. A cable alone does not tell us which part is responsible.
Write down what is actually slow
Record whether the problem affects one game, every download, online matches or signing in. Note the time and any exact error code. Compare the same activity after each change rather than changing several settings together.
Other devices working well is useful information, but it does not establish a failed PS5 component. The console, its connection and the particular online service still need to be checked separately.
Confirm that the console is using wired LAN
PlayStation lists Settings > Network > Settings > Set Up Internet Connection, then Set Up Wired LAN > Connect. Confirm that setup rather than assuming plugging in a cable changed the active connection.
Check PlayStation service status. If a service has an incident, follow its updates before treating that symptom as a hardware fault. Keep unfamiliar DNS, MTU and other advanced settings unchanged; PlayStation recommends asking your ISP or network administrator for help.
Use the exact error code
For NP-102947-3, PlayStation recommends restarting the console, trying a wired connection and checking the network settings. Its guidance also covers wireless placement, restarting network equipment and asking the ISP about router firmware. Follow the official page for that specific error.
If you manage a shared network, coordinate any router restart first. Do not factory-reset the console or open it just because a download is slow. Record which safe checks helped and which did not.
Bring evidence, not a guessed diagnosis
If the problem persists, tell us the PS5 model, exact symptom, error code and whether it happens on Wi-Fi, wired LAN or both. Mention a damaged connector, liquid exposure or earlier repair work without forcing anything to reproduce the fault.
We can discuss evaluation of a supported console. A connection complaint does not by itself justify an HDMI replacement or any other part. Price, repair eligibility and timing need confirmation after the problem is understood.
Choose Davie, Tamarac or Fort Lauderdale / Swap Shop using the store links below. Keep account passwords out of quote forms. Swap Shop is closed Monday and Tuesday; use an online request and check the next open day before traveling.
Sources and further reading
Common questions
Does slow Ethernet prove my PS5 needs repair?
No. Confirm wired LAN setup, check service status and record the exact symptom before deciding whether hardware evaluation is needed.
Should I change DNS or MTU to make downloads faster?
Do not treat a random setting as a guaranteed speed fix. PlayStation advises getting help from your ISP or network administrator if those settings are unfamiliar.
What should I include in a repair request?
Include the model, exact error, affected activity and results on Wi-Fi and wired LAN. Do not send passwords.
Related repair help
Get a clear next step.
Call your nearest Phone Repair Guy store or send the device and symptoms for a repair evaluation.