Below is a list of the some common faults that are experienced…
1. TV set not turning on or taking a while to turn on –
First check the TV set is plugged into the electricity mains! Also check to see if there is any switch that may have been turned off on the set itself! If the TV set is still not turning on then this is normally an electronic fault usually occurring on either the power supply board (PSU) or main board of the television. Sometimes components called capacitors may need to be replaced on one of these circuit boards.
2. TV set turning itself off (sometimes on and off itself) –
As per above, this is normally caused by a fault on either the power supply board (PSU) or the main board.
3. Stuck in Standby mode, Clicking sound –
Similar to ‘TV set not turning on’ above
4. No Picture or problematic picture –
For LED televisions this could possibly relate to a faulty T-con board. Sometimes however the fault could be attributed to the main board. For Plasma televisions, this fault could relate to circuit bords called Y sustain, X sustain, Z sustain and Buffer/Scanning boards. Sometimes a faulty screen can also make one of these circuit boards go faulty. Also it is quite often associated with faulty LED strips (backlight broken) which would need to be repaired or replaced. For Rear Projection televisions, most of the time it is the internal lamp that might need replacing.
5. Lines on the screen –
There are a number of possible causes of lines (vertical or horizontal) appearing on a screen. These include a possibly faulty T-con board, X, Y or Z Sustain boards, Scanning board or worst case scenario a faulty screen. If you suspect that the lines have appeared as a result of a knock on the screen in some way then it does increase the possibility that your screen is faulty and hence not economically worthwhile to repair.
6. Dark picture or ghosting image –
Frequently this is caused by a faulty T-con board. Note that in some instances it could be a faulty screen that is causing the T-con board to go faulty.
7. No Sound or problematic sound –
Frequently associated with a faulty board or sound board. Sometimes, it is actually speakers but this is rare as one of the 2 speakers should still work okay if one has failed.
8. Source / Inputs not working –
HDMI, Video or Audio, USB, Antenna input may not be working. Normally, inputs at the side or back of the television are connected to the main board, hence it is usually this board that may require a repair.
9. Remote not responding –
This may sound obvious, but firstly try to replace the batteries on the remote! If the television still does not respond to the remote then quite possibly you may have a fault with the IR sensor in the television or the remote itself may be faulty.
10. Not Connecting to the Internet –
If the television has WiFi then the cause of this difficulty could be a faulty WiFi module. If it is connected with an internet cable then it is possibly caused by a faulty main board.