Backlight Replacement In Sony Bravia LED TV MODEL W60B
As I forgot to click the backside plate and front side view when the TV was not working, I am sorry I could not share these snaps as per my usual practice in an article. My apologies!
This TV was brought to me with the complaint that there was no display on the TV and it was taken for repair three times, but display failed within a few hours of working. When I switched on, I saw the TV was blinking six times. Backlight was the issue as per Sony blinking codes. Well, this was lying in one corner, as I was busy with a lot of personal work due to my wife’s hospitalization and my two sons, along with their family came in to stay with me. I had only very little time to just grab some sets whatever quickly I could do and finish. Sets kept on coming and at a time, my backlog was as high as 40 – 50 sets of different types of audio and video. Since this customer had already one TV in working condition, there was no hurry. That TV was also repaired by me long back.
Finally, when the clouds got cleared from the home sky, I loaded around six TV sets in my car and went to one of my technician friend’s shop, around 35 KM away from my home. After spending almost 12 hours in his shop, I could get two of the TVs repaired, which included opening three sets, fetching the backlight for this TV, having lunch and snacks. One was this Sony set. OK, having told the story let us now look what are the things we did to replace the backlight.
First the back cover was opened and a test on the backlight was performed by my friend. He found that the backlight was defective. To access the backlight, we need to remove the boards, the panel; i.e. strip the entire TV apart. Once the backlight is visible, we have to remove the locking clips of the reflector. It was easy in this as it had straight clips. If these were of sliding type with locks underneath, be sure of seeing many breaks in the process. Even then, one of the clips was missing, probably not put back by the previous technician. Then each strip was tested by my friend and found that one or more LEDs in every strip, A & B type, were out. We also found that the previous technician had replaced only the burnt LEDs, which brought imbalance in current flow that caused further failure. The LEDs of same batch and voltages are preferred and what we get from market might not match. He had patched up the strips so clumsily too! The variation in gap of the light might also affect the focus, as these are designed with maximum perfection.
The replacement was fetched from a shop situated around 10 KMs away. We too had lunch after that and returned back to continue with the work. After checking the voltages of each new strip in the LED Tester, which showed 30V, and ensuring that there were no manufacturing defects, the new strips were replaced in the places from where old LED strips were removed and scraped clean.
Then my friend reassembled the TV: Fixed the reflector and its holding clips, placed the sheets on top of that and finally the panel was moved very carefully holding at the sides and supporting in the centre and placed on top of that. Then the side clips were pressed onto its place.
Frame was fixed with its screws around. Then it was kept facing down. Boards were placed back, and just two screws were fixed to hold it in place and to avoid accidental slipping off causing damages to board and other parts. The scaler board was connected to the LVDS cable. After rechecking everything, he applied power. The display came on the TV, bringing smiles on two faces (for a change this time! LOL). We noticed a strain in the mid top of the screen and very thin lines horizontally and vertically touching that spot. It showed a bad handling of the TV by someone before. Probably finger would have got pressed on that spot. Anyhow, I took snap of that too and informed the customer, who was good enough to understand it.
After fixing the boards firmly, and fixing the back cover, we left the TV running and set our hands on the next one. I returned home in the night and allowed this TV and one more, which I brought with me to run for hours in the next day morning. Both TVs were delivered to the customers, adding satisfaction to my bag. (An article on the other TV is in the making)
This article was prepared for you by Parasuraman Subramanian from India. He is 71 years old and has more than 30 years’ experience in handling antique equipment like Valve Radio, Amps, Reel Tape Recorders and currently studying latest tech-classes conducted by Kerala State Electronics Technicians’ Association. He has done graduation in BBA degree, private diploma in Radio Engineering and retired as MD of a USA company. Presently working as Consultant to Hospital and other institutions.
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You may check on his previous repair article below:
https://jestineyong.com/corroded-wires-caused-intermittent-contacts-in-computer-atx-smps/
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Waleed Rishmawi
March 20, 2021 at 2:00 pm
From experience, that strain on that screen will eventually grow and the display will become not clear. Still happy the customer understand your situation because it was seen after the replacement. I usually check the display with a bright light to make sure the display is ok before the repair. Have a blessed day.
Parasuraman S
March 20, 2021 at 4:45 pm
Yes, I am aware of that possibility! Let's keep our fingers crossed! Many thanks for your comments!
Arunkumar
March 26, 2021 at 1:47 pm
Hello sir iam a electronic repairing hobbist I had read your article regularly I want to buy a esr meter I need your advice and if u know pls mention cost and also details about ringtester where we get it pls reply sir ur repairing post are very good thankyou
Parasuraman S
April 17, 2021 at 6:16 pm
You can get in touch with Jestine Yong. Please visit the section tools. He is the person who supplied it to me.
Albert van Bemmelen
March 20, 2021 at 2:27 pm
You are again a very busy repair man reading this interesting repair story! I myself these days have less time to do as many repairs as I used to do and fixing tv's was never my main occupation. And they probably never will be because of the sizes of todays modern screens that just take up too much workspace to begin with. Because of my fading knowledge on TV repair I wondered what you meant with "LEDs in every strip, A & B type"? I guess it is a left and a right horizontal ledstrip part that are connected? Or is it a Sony Led type of TV related?
Parasuraman S
March 20, 2021 at 5:11 pm
A strips may have four LEDs and B strips may have around 5. There is variation in current consumption, as can be guessed. Manufactures use a combination of A & B or A alone on the top and bottom and B in the middle. This is to have the backlight load spread evenly to the driver. Hope this could be the answer. Perhaps experts in the forum could correct my understanding or provide better clarity!
Yogesh Panchal
March 20, 2021 at 4:23 pm
Sir,
This Types of screen are very delicate to handle.some of them are Paper led screens which may get crack on little jerk.I know some year back i received one 42" LED TV stating problem negative Picture effect on the screen i noticed screen was already cracked from one corner.customer admitted that was done by him while cleaning the screen. Authorized service center gave him repair estimate of Panel replace is near by 80% cost of new TV. so he bring this TV to me if i can fix this problem..so i opened this TV on my desk...
while opening i just missed my balance and TV screen was got cracked horribly from top to bottom diagonally.thanks to god this thing is done in front of that customer.he was also unbalanced because he was holding the TV.
Best way to open this type of screen is your Floor area or a flat surface bigger than your TV Size and always use Heavy Duty Suction silicone Cup Tool for handling any types of panel.
Parasuraman S
March 20, 2021 at 7:58 pm
Yes, fully aware of this. My friend handles panels on daily basis. He knows the trick. What I normally do is to lift the panel with all the sheets held together. That way, we can avoid heaving and sagging! I use soft hand gloves too!
Subhash.p
March 23, 2021 at 12:01 pm
Good article. ...thanks to parasuraman sir. ...God bless you
Parasuraman S
March 23, 2021 at 8:48 pm
Many thanks!
Tariq J Haider
January 18, 2022 at 6:21 am
I have a 65 inch Sony TV model KD-65X9000C very thin panel. It suddenly stopped working and Four red flashes started blinking. I took it to Sony service centre and they checked.After checking they said the main board was ok but the fault was with panel and it couldnt be repaired only replaced. I asked them to check the backlight LEDs but they said that they are sealed and working properly.
Can you guide me as panel replacement very expensive.Any other method to activate the panel. Now when I power on the Tv it starts to try to load android but after 5 secs turns off and then starts red blinking.
Imontay
September 30, 2023 at 12:22 am
I have this exact same issue. Did you find a fix?