- Networks
- UniFi systems
LUZ-APAGADA
Ubiquiti LUZ-APAGADA on UniFi: device offline or without power
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Medium
Quick answer
If your UniFi device LED is off, Ubiquiti treats it as an offline device. Check the power, PoE and Ethernet cables, swap the cable and try another switch port or PoE adapter before assuming the hardware has failed.
Safety first
Stop and check this first
- Do not open the UniFi device casing to look for the fault: if it will not power on with good cables and ports, arrange a warranty replacement.
Safe checks you can perform
- Look for signs of power
- Inspect and swap the cable
- Try another switch port or PoE adapter
Leave these tasks to a qualified professional
- Do not attempt this professional task: RMA request to Ubiquiti
- Do not attempt this professional task: Cabling check by your installer
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
RMA request to Ubiquiti
What they doIf the device shows no sign of life with another cable and another port or PoE adapter and is under warranty, you can request a new unit through Ubiquiti's RMA portal.
They must show youwhich cables, ports and adapters were tried and the result.
In writingthe RMA number, the diagnosis and the replacement decision.
Cabling check by your installer
What they doIf several devices go dark or the problem follows a port or a cable run, whoever installed the network checks the cabling and the PoE switch.
They must show youwhich cable run or port fails and the test that proves it.
In writingwhat was replaced (cable, port, adapter) and the result.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Look for signs of power
- Who:
- you.
- How:
- check whether the device shows any light or lit screen; on a switch that was just updated, wait a few minutes before treating the screen as off.
- Result that matters:
- knowing whether this is a power problem or a connectivity problem.
- If there is a light or screen:
- the device has power, follow UniFi's connectivity guide.
- If there is no sign at all:
- check the power, PoE and Ethernet cables.
- Evidence to keep:
- photo of the device and the time of the last update, if any.
Evidence: UniFi device connectivity troubleshooting · Troubleshooting Offline UniFi Devices
Inspect and swap the cable
- Who:
- you.
- How:
- make sure the power cable or the Ethernet cable delivering PoE is firmly seated at both ends and replace it with one in good condition, without forcing the connectors.
- Result that matters:
- ruling out a broken cable as the reason no power arrives.
- If the LED lights up with the new cable:
- discard the old one.
- If it stays off:
- try another port or PoE adapter.
- Evidence to keep:
- note of which cable was swapped and the result.
Evidence: Understanding Device LED Status Indicators · Troubleshooting Offline UniFi Devices
Try another switch port or PoE adapter
- Who:
- you.
- How:
- connect the device to another PoE port on the switch or to another compatible PoE adapter and wait for it to boot (the LED flashes white while it starts).
- Result that matters:
- ruling out a damaged port or adapter.
- If it boots on another port:
- flag the previous port and tell whoever manages the network.
- If it still will not power on with a good cable and port:
- consider a warranty replacement.
- Evidence to keep:
- port or adapter tried and how the LED behaved.
Evidence: Understanding Device LED Status Indicators · Troubleshooting Offline UniFi Devices
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Networks
- Brand
- Ubiquiti
- Product type
- UniFi systems
Known code variants
- punto de acceso UniFi sin luz
- switch UniFi pantalla apagada
- UniFi access point no light
- UniFi AP not powering on PoE
- UniFi device offline no LED
- UniFi led apagado
- UniFi LED off
- UniFi no enciende PoE
- UniFi offline sin luz
- UniFi switch screen dark
What it means
In UniFi's official LED guide, LED off means the device is offline, and Ubiquiti asks you to verify the power, PoE and Ethernet cables. Its offline device guide starts with the physical layer: signs of power, damaged cables (one of the most common reasons devices get no power) and switch ports or PoE adapters. Some switch LCD screens may stay dark for several minutes after an update. The LED alone never proves the device is faulty.
Warnings and stop conditions
- Lowsource verified
Do not open the UniFi device casing to look for the fault: if it will not power on with good cables and ports, arrange a warranty replacement.
Evidence: Troubleshooting Offline UniFi Devices
Symptoms and causes
Probable causes · in order
- Damaged cable carrying no powerCommon
Ubiquiti says damaged cables are one of the most common reasons a UniFi device does not receive power.
Evidence: Troubleshooting Offline UniFi Devices
- Faulty switch port or PoE adapterPossible
The official guide suggests trying a different switch port or PoE adapter to rule out port damage.
Evidence: Troubleshooting Offline UniFi Devices
- Switch screen dark after an updatePossible
Ubiquiti warns that a switch LCD screen may stay dark for several minutes after an update without anything being wrong.
Evidence: Troubleshooting Offline UniFi Devices
- Unit that needs replacingLess common
If it still will not power on with good cables and ports and is under warranty, Ubiquiti says to request a new unit through its RMA portal.
Evidence: Troubleshooting Offline UniFi Devices
Virtual technician
Does LUZ-APAGADA still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
UniFi device connectivity troubleshooting
Ubiquiti · 2026 · official_doc
- 2
Understanding Device LED Status Indicators
Ubiquiti · 2026 · official_doc
- 3
Troubleshooting Offline UniFi Devices
Ubiquiti · 2026 · official_doc
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