Here’s the quick fix if your TV won’t recognize the HDMI connection:
Unplug the TV and HDMI source for 60 seconds, then reconnect the HDMI cable to a different port. Power the devices back on. If the issue persists, test with a known-good cable and another device.
What’s happening inside the HDMI port
An HDMI port can fail for all kinds of reasons—some mechanical, some electrical. You might have bent pins, cracked solder joints, dust clogging the works, or even a fried port IC. Since 2023, manufacturers have been shipping TVs with HDMI 2.1b ports, but the repair process hasn’t changed much. Those tiny pins are still just 0.6 mm wide, and the solder balls under them are a delicate 0.3 mm. If you don’t have a hot-air rework station and a fine-tip soldering iron handy, honestly, this isn’t the job for you—call the manufacturer instead.
Step-by-step solution
Power-cycle everything. Yank the power cords on both the TV and your source device (cable box, PC, whatever). Leave them unplugged for a full minute. Plug everything back in and restart both devices. Nine times out of ten, this clears up any HDMI handshake nonsense.
Try a different HDMI cable and port. Since 2024, HDMI cables have to be certified, but let’s be real—defects still slip through. Start with a cable shorter than 6 ft; anything longer can hide the real problem. If your TV does 4K at 120 Hz, grab an HDMI 2.1b certified cable.
Shine a flashlight in there. Grab a bright one and peer into the port. Look for:
- Pins that are bent or snapped
- Any crud—dust, pet hair, last night’s popcorn
- Blackened plastic or burn marks
Clean the port safely. Grab a can of TechBrite Zero-Dust (2026 model) and hold it about 3 inches away. Give it short bursts at a 45° angle so you don’t build up static. Whatever you do, don’t stick anything sharp in there—those pins break easily.
Update firmware and drivers. On 2025+ LG OLEDs, go to Settings → All Settings → General → About TV → Check for Updates. On Windows 11 23H2, right-click Start → Device Manager → Display adapters → [Your GPU] → Update driver → Search automatically.
Reset the TV’s HDMI settings. Head to Settings → Picture → Advanced → HDMI ULTRA HD Deep Color, turn it off for 10 seconds, then turn it back on. This forces the handshake to refresh.
If this didn’t work
Use an HDMI adapter. Plug a bidirectional HDMI-to-DisplayPort adapter like the Club 3D CAC-1575 into a spare USB-C or DisplayPort on your laptop. This sends the signal straight past the TV’s busted HDMI circuit.
Go wireless. The 2026 MotionView WHDI 2 can beam 4K at 60 Hz up to 164 ft using 60 GHz. Pair the transmitter to your source and the receiver to the TV.
Replace the port yourself. You’ll need an 850 °F hot-air station, 0.3 mm no-clean flux, and a replacement HDMI 2.1b socket (Digikey PN 1528-1822-ND). Warm the board to 120 °C for 90 seconds, pop off the old socket, and solder the new one in 25-second bursts so you don’t lift pads on 2025 LG panels.
Prevention tips
| Action | Frequency |
|---|---|
| Gently insert and remove cables at 90° angles | Every time |
| Use strain-relief ties to keep cables from tugging | Monthly |
| Blow compressed air into the port every six months | Twice a year |
| Keep heavy objects off the back panel | As needed |
Stick to these habits and your HDMI port should keep chugging along for the TV’s entire life—usually 7–10 years these days.
