Tucson TL32HD782 LCD Screen
titi1404
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Good evening, I have had an LCD television from the brand Tucson for 4 years, purchased from a hypermarket.
Even though it is a budget brand, I am very happy with this screen for its price/quality ratio.
However, after 4 years of intensive use, it has started having issues over the past few weeks.
When I press the power button, a blue ring lights up, confirming that the power is on.
So far, so good, but when I turn on the screen using my remote control (or directly from the TV), I often observe different behavior:
- the ring dims for a certain amount of time (which can vary) and then the TV turns on, but I end up with a black screen (I cannot watch TV channels or access my various devices; however, I can see the names like HDMI, PC, TNT, and others displayed).
- the same as the previous step, except that the screen does not start and goes back to the original indicator (blinking or solid)
- the screen starts normally (60% of the time)
I have noticed that the screen is more likely to start normally when I unplug it from the power for several minutes.
I would like to have some suggestions on where the issue might be coming from (capacitor? power supply?).
Thank you in advance.
Configuration: Windows 7 / Chrome 15
Even though it is a budget brand, I am very happy with this screen for its price/quality ratio.
However, after 4 years of intensive use, it has started having issues over the past few weeks.
When I press the power button, a blue ring lights up, confirming that the power is on.
So far, so good, but when I turn on the screen using my remote control (or directly from the TV), I often observe different behavior:
- the ring dims for a certain amount of time (which can vary) and then the TV turns on, but I end up with a black screen (I cannot watch TV channels or access my various devices; however, I can see the names like HDMI, PC, TNT, and others displayed).
- the same as the previous step, except that the screen does not start and goes back to the original indicator (blinking or solid)
- the screen starts normally (60% of the time)
I have noticed that the screen is more likely to start normally when I unplug it from the power for several minutes.
I would like to have some suggestions on where the issue might be coming from (capacitor? power supply?).
Thank you in advance.
Configuration: Windows 7 / Chrome 15
3 answers
Good evening Titi, check the lamp that lights up the screen from the back (LCD projector). It is out of order; if you notice a dark deposit inside the bulb. However, you can hear the sound correctly.
I thought the problem might perhaps come from there, but I wouldn't have any display at all if that were the case. Moreover, I have no loss of brightness when the screen works properly. But I will still check.
As for the sound, there’s no problem when the screen works, but I have neither sound nor image when the issue occurs.
As for the sound, there’s no problem when the screen works, but I have neither sound nor image when the issue occurs.
If you have no sound, then the problem must be in the standby output control circuits. First, remove the fuse to test it with an ohmmeter; you should find 0.1 ohm. Otherwise, you need to measure the supply voltage of the standby output control. Take all precautions during this operation as the circuit is live.