The TPLink Archer C5400 occasionally restarts without warning.
The TPLink Archer C5400 occasionally restarts without warning.
Your TP-Link Archer C5400 is experiencing frequent power cycling, which could be due to instability in the power source. Since you have a quality UPS with clean sine wave power, the issue likely lies elsewhere—such as internal circuitry or firmware. Check for loose connections, try a different outlet, and ensure the device isn’t overheating. If problems persist, consider updating the firmware or consulting the manufacturer’s support.
It depends on the specific unit. Does it understand electronics? No need for me to explain it. Try using another power adapter. A different adapter with the same plug should deliver similar voltage and current. For instance, a 12V 4A adapter works fine, while a 12V 5A or 5V 4A one won't.
Besides purchasing a fresh power brick, are there other options available? Since you already have a new mesh item in your Amazon cart, you’re all set. Just trying to recoup the 300 USD I spent on the archer without needing any additional spare bricks.
Do you own a multimeter? For someone new to electronics, the best first step is to verify the output voltage matches the specifications listed on the device. For example: This test has issues because... well, there’s nothing connected. It only works if the unit is fully off (you’ll see 0V) or if it’s operating far outside its rated range (several volts). Since your router powers on and functions briefly, that eliminates the first possibility. Regarding the second point, it’s a straightforward check—just run the test and see what you get. There’s minimal risk here since you’re testing DC side and not mains. Avoid touching the terminals (+ and -) and ensure the meter is set to DC voltage with the correct range. Remember, this test only confirms whether the brick is definitely bad; it can’t guarantee performance under load. In practice, it likely shows 12V when idle but drops below acceptable levels when you add power, causing a reboot. Performing this test usually needs disassembly, simulated loads, or a custom setup—something best left to experienced users.
The multimeter stopped working last week. I don’t think it’s worth trying to fix the power brick or buying a new one just yet. I’ve already reset it back to its original settings and that didn’t help. The instructions from tplink seem like they’re covering everything.
I was considering suggesting OpenWRT, but it seems unsupported. You might want to check if the firmware is up to date (unless you're already doing so). Just keep in mind that rebooting during an update could brick the device. Otherwise, it's not a good idea.