Why is there a black box on the screen?

Why is the picture chaotic and/or torn and/or with a buzz in the speakers?

Check if electrical products such as kitchen appliances, fluorescent lights or light dimmers are nearby. They may interfere with the TV’s picture.

Try viewing a picture from another device, such as a DVD player or a game console, to narrow down the source of the problem.

Why is there a black box on the screen?

Change settings of Closed Caption (CC) (p. 15, 27).

Why is the screen blank and the power indicator blinking?

The TV has gone into shutdown mode to protect itself. Try unplugging it for a few minutes and connecting it again. If there was a temporary power surge on the AC line it may now be OK. If the blinking returns, visit www.panasonic.com/support (U.S.A.) or www.panasonic.ca/english/support (Canada).

Why do some small spots on the screen remain bright or dark?

The TV panel is made up of a few million pixels and is produced with advanced technology through an intricate process. Sometimes a few pixels may be bright or dark. These pixels do not indicate a defective panel and will have no impact on the performance of the TV.

Sound

Why is there no sound coming from the TV?

Make sure the volume is up and MUTE is off.

Check that the correct SAP (Secondary Audio Program) is selected by pressing SAP on the remote control (p. 15).

If the TV is connected to a Home Theater via optical cable, then: Check the connection, the audio system is on, the correct input is selected.

Check [HDMI1-2 in] analog/digital audio settings (p. 20).

Why is the sound unusual, distorted, low volume or in another language?

Check that the correct SAP (Secondary Audio Program) is selected by pressing SAP on the remote control (p. 15).

Check that all connections of external equipment connected to the TV are secure.

When using Cable or Satellite box, check the device’s audio settings (example: try changing the box’s Audio Range to “narrow”).

Why is there a clicking, ticking or buzzing sound coming from the TV unit?

When TV power is turned on or shut off there are electrical components that make a click sound. This is normal.

Changes in the temperature and humidity of the room may cause thermal expansion and contraction that can produce sounds. This is not a sign of faulty operation or a malfunction.

Other

Why does the CC button not display Closed Caption?

When viewing TV via an HDMI connected device, such as a Cable or Satellite box, CC must be enabled at the device.

Closed Caption is available only at supported TV programming.

Why do parts of the TV become hot?

The main unit radiates heat and some of the parts may become hot. Even if the temperature of parts of the front, top and rear panels has risen, these temperature rises do not cause any problems in terms of performance or quality.

Ensure good ventilation.

Do not block the ventilation holes of the TV and do not place the TV on top of other equipment.

Why doesn’t the Remote Control work?

Check that the batteries are fresh, are of the same type and are installed with the correct polarity (+ and −).

To operate other devices, such as changing channels when using Cable or Satellite boxes or operating non-Panasonic Blu-ray players, use the remote control of the devices.

Troubleshooting

English 29

TC-40A420U, TC-39A400U, TC-32A400U specifications

The Panasonic TC-32A400U, TC-39A400U, and TC-40A420U are a series of high-performance LED televisions that cater to a range of viewer preferences and needs. Each model offers a blend of cutting-edge technology, exceptional image quality, and a sleek design, making them a popular choice among consumers looking for an enhanced viewing experience.

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