Article ID : 00206125 / Last Modified : 20/12/2018

Some digital TV channels are unavailable

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Some digital TV channels are unavailable
Please note the digital TV reception can be affected by many outside factors. If some digital TV channels are unavailable, please follow the below check for testing and confirmation.


1. Solution 1 – Restart TV system software
2. Solution 2 - Confirm TV signal quality and signal level
3. Solution 3 - Confirm TV aerial lead cable
4. Solution 4 - Remove external devices
5. Solution 5 – Other possibility to cause digital TV channels are unavailable (Some channel missing)


1. Restart TV system software
First power off the TV and unplug from mains power socket. After 1 minute, please power on again to restart the TV system software.


2. Confirm TV signal quality and signal level
[For Android TV models] - Press [HELP] button on remote, and select “Signal Diagnosis”.
[For non-Android TV models] - Press [OPTIONS] button on remote, and select “System Information”.


“Signal quality” and “Signal level” would be shown on the screen with a bar chart and a number (from 0 to 100), as shown below.
If the values are unstable (possible external interference), or remain at a low level (inadequate digital TV signal level), it is suggested to test and confirm other items in this list.


3. Confirm TV aerial lead cable
Confirm the TV aerial lead cable is secured in place on both the RF wall outlet as well as the back of the TV.
The TV signal may degrade for prolonged use or bad contact of the TV aerial lead cable. Suggest replace with a new TV aerial lead cable.


4. Connect aerial lead cable to TV directly
For aerial lead cable connecting from RF wall outlet (Pict.1) to an external device (TV receiver, recording set-top box or RF signal splitter) then relayed to the TV using a second TV aerial lead cable, as shown in the left image below (Pict 2), it would be suggested to first remove the external device and connect the TV directly to the RF wall outlet. If symptom not observed after perform this action, suggest confirm the operation on the external device.


5A. HDMI interference
For defective HDMI cables connecting the TV and other home audio-visual devices, high frequency HDMI signals may also adversely affect TV signal reception.
If the removal of HDMI cables eliminate the TV reception issue, suggest replace such HDMI cables.


5B. Switch off “Auto Service update” and “Service replacement”
(Android TV model) - Press “Home” button, select [Settings] – [Channel Setup] – [Digital Setup] – [Technical Setup]
                                  [Auto Service update] > Off
                                  [Service replacement] > Off


(Non-Android TV model) - Press “Home” button, select [Settings] – [System settings] –[Channel Setup] – [Digital Setup] – [Technical Setup]
                                   [Auto Service update] > Off
                                   [Service replacement] > Off


Adverse weather / power outage / maintenance works on communal aerial broadcasting distribution (CABD) system


Consider consult mansion management office for reception issues after adverse weather (thunderstorms or typhoons), power outage or maintenance works on the CABD system.
If symptoms persisted upon the confirmation of all aforementioned items, suggest consult mansion management office with regards to the reception issue, or arrange CABD system engineering service provider for an inspection.