Genie’s Safe-T-Beam diagnostic chart lists two main branches when both the red and green LEDs are off: the powerhead is not powered, or wiring from the powerhead is bad. Start with opener power and accessible sensor-circuit wiring before replacing the photo eyes.
Read Genie Safe-T-Beam red and green LEDs together
What is each Safe-T-Beam eye reporting at the same time?
Record both LED states before choosing a blink-code branch.
Genie identifies the red LED unit as the source/transmitter and the green LED unit as the receiver. A blink count is not enough by itself: several diagnostic branches change depending on whether the other LED is steady, off or also abnormal.
This exact manufacturer signal can feed the following diagnostic family. Keep the original code or LED pattern when troubleshooting.
What you are likely to notice
- Neither Safe-T-Beam LED is lit
- The opener will not close the door normally
- Moving or re-aiming the sensors does not produce a normal solid LED state
Check these in order
1. Confirm the opener has power
Check the plug, breaker and any obvious power interruption. Genie lists an unpowered powerhead as one cause of both Safe-T-Beam LEDs being off.
2. Inspect accessible sensor wiring
Look for pinched wire, loose terminal screws and obvious shorts between the powerhead and the Safe-T-Beam circuit.
3. Separate a system-wide dark state from one dark sensor
Both LEDs off is not the same pattern as red/source off with green on. Record both sides before following a replacement path.
4. Stop before uncertain internal electrical work
If power is present but the sensor circuit remains dark and the visible wiring looks intact, use the opener manual or Genie support for model-specific diagnosis.
Both dark sensors change the order of checks
When neither LED is lit, there is no point starting with precision alignment. Genie sends this state toward power at the opener or wiring from the powerhead. That makes the plug, breaker and visible sensor-circuit wiring higher-value checks than moving the photo eyes.
If the opener itself is operating in other ways, record that fact. A powered opener with a dark sensor pair narrows the issue differently than a completely dead opener.
Why swapping sensors too early can waste money
A pair of new sensors will also be dark if the circuit is not delivering what it needs. Verify power and accessible wiring before treating both photo eyes as failed simultaneously.
If the visible wiring is intact and the powerhead is powered but the circuit remains dark, stop before internal electrical guessing. Model-specific service data is the next useful source.
Both lights off is a power/wiring starting point
Genie's Safe-T-Beam self-diagnostic table lists both source and sensor LEDs OFF with two first possibilities: the powerhead is not powered, or the wiring from the powerhead is bad. That is a materially different branch from a red LED blinking while green remains on. Confirm opener power first, then inspect the low-voltage sensor wiring for an obvious cut, loose connection or short before changing sensor aim.
If the opener itself has normal power but neither Safe-T-Beam LED lights, the absence of both indicators is the strongest clue. Avoid spending time on sunlight, beam alignment or remote programming until the power/wiring path to the sensors is accounted for. If wiring is damaged inside walls or the fault cannot be isolated safely, stop at documentation and move the repair to a qualified technician.
- Confirm the opener/powerhead is actually powered.
- If powerhead works, inspect the sensor wiring path and connections before alignment.
- Do not diagnose interference from a both-lights-off state; interference has a different Safe-T-Beam pattern.
Before escalating a both-off condition, note whether the opener motor head and wall console have power, whether either Safe-T-Beam light ever flickers during a power cycle, and whether there is visible wire damage near the floor or powerhead. This makes the handoff about the sensor power/wiring path rather than about door alignment or radio controls.
Stop DIY troubleshooting when…
- The opener outlet or breaker problem is not straightforward
- Wiring damage continues into an inaccessible wall or opener housing
- There is burning, heat damage or a damaged terminal block
- The garage door itself is mechanically unsafe
Garage door springs, cables and a falling/unbalanced door can store or release dangerous force. Those are door-system problems, not just opener settings.
Common questions
Why are both Genie Safe-T-Beam lights off?
Genie's chart lists an unpowered powerhead or bad wiring from the powerhead as the main branches.
Will alignment turn the LEDs back on if both are dark?
Not if the underlying problem is power or wiring. Both LEDs off should send you to those checks first.
Can I close the door without Safe-T-Beam?
Genie states the safety sensors are required for normal opener operation. Do not permanently bypass the system.
Manufacturer sources used
These links are the factual baseline for the diagnostic claims above. Model-specific manuals can supersede general guidance.