Milky Display Necessitated Panel Replacement In Samsung LED TV-UA43N5005AK
This TV was brought by a known person from childhood. This was the first time he ever brought anything to me for repair. The complaint was milky display. I went to his home, took a picture and video and sent it to my techiefriend who handled panel level service, including bonding and laser treatment. As the TV required internal investigation, I brought the TV to my home and opened it and cleaned it thoroughly:
The five vital voltages to the panel such as VGL, VGH, V.com, AVDD & VCC were checked and found to be ok. Then removed left side of the LVDS cable from the T-con board, that went to the scalar board. Did the same with the right side too after putting back left side. Following was the result:
As we can see, the panel had indeed developed shorts on both sides, left side of which is very severe. There was no way of doing any shortcut methods like masking, cutting or shaving the CKV lines. Panel replacement was the only solution and I sought the customer’s approval after obtaining the estimate from my techiefriend. Customer took a couple of days for a decision and sent me the advance as per my request. I do not undertake major works in any set without taking an advance, as there could be many slips between the cup and the lip. I took the TV to my techiefriend after obtaining an appointment. The back cover was fixed only with a few screws to enable safe transportation.
Following are the pictures that I took when my friend was doing the panel replacement. He normally does not allow anyone inside the shop. He held a soft corner for me and accommodated my requests willingly and took care of my comforts too very well:
He is an expert in panel related issues and generally takes only work from technicians. His shop is full of TVs and he hardly finds time to take care of his personal needs. Both he and his son are very thorough and dedicated and are running the shop with very good reputation and credibility.
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After the panel was replaced, which had its own T-con board, he tested it and ran it for a few minutes feeding video.
Following is an extract from the video that I took there:
The speakers were bad and had to be replaced. My friend did not have suitable speakers. So, I brought it home and went to the market and bought replacement speakers and fixed them. Following are the pictures of the damaged speakers, which would speak for itself:
I tested the TV for several hours before giving delivery to the customer. Mission accomplished with satisfaction that got collected to the bag as usual!
This article was prepared for you by Parasuraman Subramanian from India. He is 76 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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