Monday, April 15, 2019

VITRON LED TELEVISION MODEL HTC3228 AUDIO PRESENT BUT NO PICTURE NOW REPAIRED

I received this television from my neighbor and the complaint was sound is okay but no picture symptoms.

First I had to confirm if what the client is saying is correct and after switching on the television indeed the symptoms were confirmed right.
I took the set to my workshop and before embarking on opening the set I decided to use a bright light from the torch to see if there is something on the screen like dark picture which will guide me exactly which circuit to suspect even before opening the set.


After using a strong light from the torch this is what I saw...


Yes! Indeed there is an image/picture but it is too dark to see...as I have written in my latest book on lcd led repair, LCD-LED television do not generate their own light like CRT television and therefore need something to light up from the back so that the image can be visible- This is what we call back-light.

So if there is a problem with the back-light circuit then images will be dark and with that I decided to open up the set to do further investigations with my main interest on the back-light circuit which of course include Led driver circuit.

After opening the set before pulling the meter it is very important to observe the circuit using your naked eyes looking for an suspicious components or area and after circling the board with my eyes I picked a capacitor with the top slightly swollen as you can see here below.



Upon more scanning of the capacitor I noted it is actually located on the led back-light driver circuit and yes! This could be the culprit.

I pulled a capacitor 220uF/50V from the capacitor kit and replaced the swollen capacitor without further testing since testing a swollen capacitor is a waste of time.



After replacing the capacitor I now had to test the effect of that one component and after applying the power the television came up smiling with the picture and sound very clear.

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22 comments:

  1. My vitron 32"digital TV is displaying while upside down.kindly help

    ReplyDelete
    Replies
    1. Check settings... Mirror should be off.

      Regards Humphrey

      Delete
  2. So my Vitron smart 43' Tv remote is not working, can I get another one, like replacement?

    ReplyDelete
  3. my TV is only providing 5 channels plz help

    ReplyDelete
    Replies
    1. Check antenna, be sure no obstacle near like tall building.

      Regards Humphrey

      Delete
  4. My vitron 24" was ok, but since 3 days ago it doesn't display anything, it's just black.
    What might be the problem and how can it be fixed?

    ReplyDelete
    Replies
    1. Maybe backlight if audio is present.

      Regards Humphrey

      Delete
  5. How much to repair my 43inch TV screen

    ReplyDelete
  6. Why myvitron tv displays horizontal lines then they appear

    ReplyDelete
  7. Hie my vitron smart tv is stuck at recovery mode when powered on.what could be the problem?

    ReplyDelete
  8. Hi my virtron 43inch does not shows clear pictures what shall I do

    ReplyDelete
  9. Hi my vitron tv is stuck at the welcome message,(wisdom.share) what could be the problem?

    ReplyDelete
    Replies
    1. Most probably software is corrupted, you may have to buy another motherboard.

      Regards Humphrey

      Delete
  10. Please help my vitron 32" screen is very dirk but sound is okay,how can you help?

    ReplyDelete
    Replies
    1. Contact me on this number

      0733 475 040

      Regards Humphrey

      Delete
  11. Vitron 55 no visual display but audio available what be the problem

    ReplyDelete
    Replies
    1. Backlight problem, Repairable while you wait.

      0733475040

      Regards Humphrey

      Delete
  12. My vitron 55 smart will only come on, but no launch.... Just write vitron.. Then go off after a few seconds... It's a few months old

    ReplyDelete
    Replies
    1. Seems the TV is still under warranty... Call me on 0733 475 040 if you still need my services.

      Regards Humphrey

      Delete