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Videocon LCD TV StandBy Mode Repaired

By on December 30, 2015
standby lcd tv repair

 

 

 

 

 

 

 

Videocon LCD TV StandBy Mode Repair

This Videocon LCD TV complaint was red light or in standby mode and it can’t be turned on using the remote control or even by pressing on the front panel power button.

Usually standby mode problem in TV is caused by the mainboard section or improper dc supply voltage by the SMD voltage regulator IC.

Videocon LCD TV StandBy Mode Repairing

 

Once the cover was removed, I could see three circuit boards. One is the power supply board, one is the Inverter board and the last one was Mainboard or Main SMD IC board.

lcd tv boards

 

I took out my digital multimer to check on the SMD voltage regulator ICs 2.5 volt and 3.3 volt and both ICs were found to be good.

lcd tv repair

The 12 volt and the 5 volts were presence also.

videocon lcd tv repair

Since the DC supply voltages were good, I now focused on the mainboard MCU IC. This IC was covered with a metal shielding and once it was removed I was surprised to see dead ants and dust on the IC legs/pins. See the two photos below:

lcd tv mainboard mcu ic

 

lcd tv mainboard repair

Next, I cleaned up the IC area using a used tooth brush and with a cleaning solution.

repair lcd tv mainboard

clean mcu ic

 

Once done the cleaning, I do a reflow on the IC using my SMD rework station.

reflow mcu ic

 

When I put back the mainboard and powered On, the display came out and no more red light-problem solved! If you want to learn how to repair LCD or LED TV you can check out Kent’s ebook here and Damons’ ebook here.  If you are a beginner in LCD TV repair you can check out John’s ebook here.

vidocon lcd tv repair how to

suranga

 

 

 

 

 

 

 

This article was prepared for you by Suranga Bandara who owns an Electronics shop in Anuradapura, Sri Lanka.




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Note: You may check out his previous repair article in the below link:

https://www.jestineyong.com/no-power-in-samsung-dvd-player-repaired/

 

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17 Comments

  1. Albert van Bemmelen

    December 30, 2015 at 7:27 pm

    Nice repair. The insects keep crawling into the electronics devices a lot in India. I guess they come to enjoy for the generated warmth of the electronics. Its nature gives and nature takes.....
    http://www.viralnova.com/reclaimed-by-nature/

    Likes(7)Dislikes(0)
    • Riaan

      December 30, 2015 at 10:30 pm

      Hi. Nice Job!!
      Tell me is that a tube of flux I see? Do you use it before reflow on all pins?
      Do you prefer liquid flux or flux paste?

      Likes(2)Dislikes(0)
    • Akshay more

      March 28, 2020 at 4:10 pm

      Plz help me Videocon led tv vju40fh11 dead led tv combo board plz how to solve the problem

      Likes(0)Dislikes(0)
  2. Hermann

    December 30, 2015 at 8:32 pm

    I just can't get enough of stories about dead ants, bugs, cockroach eggs, even lizards in TV sets! 🙂 Organic failures in electronics, so to speak.

    Likes(2)Dislikes(0)
  3. Dennis Breda

    December 30, 2015 at 10:22 pm

    Suranga, thank you for another fine article. Here in the northern US the problem in the winter is mice (small rodents). They find warmth in my shop. I kept them out with a very high frequency rodent control device but unfortunately it affected my pets in our attached home since the hf travels through the power lines. So now I use clothes dryer softener sheets which have a pleasant aroma to me but not the rodents. All the best to you. And thank you Jestine and wife for publishing these fine articles to us world wide.

    Likes(3)Dislikes(0)
    • Jestine Yong

      December 31, 2015 at 9:15 am

      Hi Dennis,

      You are welcome and Suranga had done a great job in sharing his repair tips!

      Jestine

      Likes(6)Dislikes(0)
      • Suranga Electronics

        December 31, 2015 at 5:18 pm

        Thanks ! Mr- Jestine.

        Likes(1)Dislikes(0)
  4. Henrique J. G. Ulbrich

    December 30, 2015 at 11:32 pm

    Hi, Suranga, another efficient and fast repair work. Greetings! Which cleaning product is?

    Likes(2)Dislikes(0)
  5. Mustafa

    December 31, 2015 at 2:59 am

    hi.
    sir good .

    Likes(3)Dislikes(0)
  6. Gregor

    December 31, 2015 at 5:33 am

    Thanks for sharing this article ... nice job! I don't guess the ants ate too much! 🙂

    Likes(1)Dislikes(0)
  7. Ge

    December 31, 2015 at 8:32 am

    Well done Suranga, thanks for sharing.

    We use to have a lot of damages done by ants in Brazil, specially in ECG equipment. The formic acid is conductive and corrodes everything. Those ants look for a warm place to set up their colony. In some apparatus there were thousands of them with eggs all over the places. I still remember the characteristic smell...

    Cheers,
    Gerald

    Likes(4)Dislikes(0)
  8. Parasuraman S

    January 1, 2016 at 7:04 am

    Nice Job, Suranga! I remembered the phrase 'ants in pants', when I read your article. But now it is 'ants in ics' (Ha, Ha!) You just see how these help us get a set for service! I have seen dead lizards in CRT TVs with stinking and nauseating smell! Cleaning such things is a tough job, especially when the flesh is burnt and stuck to the protruding pins on the PCB!

    You have done a nice repair work! All the best!

    Likes(0)Dislikes(0)
  9. Venugopal

    January 6, 2016 at 10:39 pm

    I got a Led TV to repair.That is Toshiba 42 " Model 39L4300EE.problem is no power.I found 2 board. I saw an IC with 8 pin is busted on the power supply board.I cant read the number. If you have any idea please help me.

    Likes(0)Dislikes(1)
  10. Humberto

    January 8, 2016 at 10:11 pm

    Nice repair Suranga. Congrats.

    Likes(1)Dislikes(0)
  11. Min Min Htun

    July 24, 2017 at 5:05 pm

    Thank You

    Likes(0)Dislikes(0)
  12. Yuvraj

    November 5, 2017 at 10:24 pm

    My videocon lcd tv power supply problem ,
    Redlight flicking and no start tv botton

    Likes(2)Dislikes(0)
  13. Rakesh

    May 31, 2020 at 11:33 am

    how to exit shipping mode in videocon hurricane32 lcd tv?
    After pressing shipping option in factory menu, tv set ON(red to blue)but no display no sound.

    Likes(0)Dislikes(0)

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