What homeowners usually notice
- Phones charge very slowly or show "not charging" on the USB port.
- The USB ports are dead but the regular outlet still powers a lamp.
- The whole device, including standard slots, has no power.
- One port works and the other does not, or the outlet gets warm while charging.
What to do right now
- Plug a working lamp into the standard slots to check for power.
- Try a different cable and a different phone or tablet in each USB port.
- If there is no power at all, reset nearby GFCIs, flip wall switches and check the breaker once.
- Stop using the outlet if it feels hot, buzzes or smells like hot plastic.
Likely causes
Worn or incompatible cable
Charging cables fail more often than outlets. A frayed cable or one not meant for fast charging can make a good port look dead.
Device needs more power than the port supplies
Some USB outlets supply modest power, and larger tablets or laptops may charge slowly or not at all, especially if both ports are in use.
Outlet lost power upstream
A tripped GFCI in a bathroom or kitchen, a wall switch or a tripped breaker will kill the USB ports along with the plug slots.
Failed USB module
The small power supply inside a USB outlet can fail from heat, surges or age, even while the plug slots keep working.
Overheating shutdown
Some USB outlets reduce or cut output when they get too warm, such as behind furniture or with both ports in use.
Safe checks you can make
- Check whether the problem follows the cable or the device, or stays with the outlet.
- Note whether the USB ports stopped after a storm or power outage.
- Feel the faceplate after charging for a while to see if it is warm.
- Check any printing on the outlet for its USB output rating.
Leave outlet covers, switch plates and the panel cover in place. Noting what you see and hear is enough; testing inside boxes belongs to an electrician.
Is this something you can fix yourself?
Many USB outlet complaints end with a new cable, a charger brick for power-hungry devices, or a reset GFCI. Those are safe and worth trying first. If the plug slots work but the USB ports are dead with several known-good cables and devices, the USB module has probably failed; since it is built into the outlet, the whole device gets replaced. That means working in a live box, so it is a job for an electrician, who can also check that the circuit and box suit the new device.
When professional help is the right call
- The outlet feels hot, buzzes or has discoloration.
- Both the USB ports and the plug slots have no power after checking GFCIs and breakers.
- USB ports died after a storm or surge along with other electronics.
- The outlet was installed recently and has never worked correctly.
Safety first. A USB outlet that gets hot, smells like burning plastic or sparks should be unplugged and its breaker switched off. If there is smoke or flame, leave the house and call 911. A dead USB port that stays cool is not urgent.
What an electrician typically checks
An electrician confirms power and voltage at the box, checks the wiring connections and verifies the outlet is on an appropriate circuit. USB outlets are deeper than standard ones, so they also check that the box has enough room for the device and wires without crowding.
The fix is usually replacing the device with a new USB outlet that matches your charging needs, done through electrical outlet installation. If the USB failure followed a storm, they may recommend surge protection at the panel.
Keeping it from coming back
Use good-quality cables, avoid covering USB outlets with furniture that traps heat, and do not expect them to fast-charge laptops unless they are rated for it. Birmingham's frequent spring and summer lightning is hard on small electronics, including the modules inside USB outlets, so layered surge protection helps. The whole-home surge protection guide explains how the layers work together.