Reliable TV Repair in Nairobi by nairobirepair.co.ke | Fast, Affordable, Expert Service 0746801984
1. Check Basic Connections
- Ensure the power cable is firmly connected.
- Verify the HDMI, AV, or antenna cables are properly plugged in. Loose connections often cause flickering, no signal, or distorted images.
- Try a different HDMI port or cable to rule out cable faults.
2. Perform a Power Reset
- Turn off the TV and unplug it for 1–2 minutes.
- Plug it back in and power it on.
- This clears temporary system glitches that may affect the display.
3. Verify Input Source
- Press the Input or Source button on your remote.
- Make sure the correct input (HDMI, AV, USB, etc.) is selected.
- Wrong input selection may display a blank or distorted screen.
4. Check for Software Updates
- Go to: Settings → Support → Software Update → Update Now.
- Outdated firmware can cause display bugs or compatibility issues with streaming apps.
5. Adjust Picture Settings
- Navigate to: Settings → Display & Sound → Picture → Picture Mode.
- Try modes like Standard, Cinema, or Vivid.
- If the screen is too dark, adjust Brightness, Contrast, or Backlight.
- For color distortion, reset picture settings to factory defaults.
6. Run a Self-Diagnosis Test
Most Sony Bravia TVs have a built-in tool:
- Go to Settings → Device Preferences → Self Diagnosis → Picture Test.
- This checks if the problem is with the TV panel or the input source.
7. Check External Devices
- Connect another device (laptop, gaming console, DVD player) to the TV.
- If the picture is fine with other devices, the issue may be with your decoder, set-top box, or media player.
- If all devices show problems, it’s likely the TV panel or settings.
8. Common Sony TV Picture Issues & Fixes
- No Picture / Black Screen → Check power, input source, and perform a reset.
- Distorted Colors / Lines → Try a different input; could be a faulty panel.
- Flickering Screen → Adjust backlight, check for electrical interference, or reset.
- Half Screen / Dark Patches → Likely a backlight or panel issue – needs professional repair.
- Ghosting / Motion Blur → Enable MotionFlow or Clear Mode in settings.
9. Factory Reset (Last Resort)
If none of the above works:
- Go to Settings → Device Preferences → Reset → Factory Data Reset.
- This erases all settings and apps, restoring the TV to its original state.
10. When to Call for Professional Repair
If you notice:
- Cracked screen or physical damage
- Vertical/horizontal lines that don’t disappear
- Backlight failure (dark screen but with sound)
- Frequent restarts or freezes even after reset
👉 It’s best to contact a certified Sony TV repair technician for diagnosis and replacement of parts like the T-Con board, backlight, or power board.
