Samsung UN55kS8000F back light on of screen problem

Marcoselectronics.com2009

21 Mar 201910:23

Summary

TLDRThis video demonstrates how to repair a Samsung 55-inch TV that turns on and off repeatedly without displaying video. The repair process involves opening the TV and identifying an issue with the ribbon cable. The solution is to use a small piece of tape to isolate specific lines on the cable. After several attempts, the TV is successfully repaired, with the video working again. The video provides a step-by-step guide for this common issue in Samsung TVs and offers a simple DIY fix for viewers to try at home.

Takeaways

🔧 The video is about repairing a 55-inch Samsung TV that turns on and off repeatedly.
👀 The TV model being repaired is Samsung A155KS8000EFE.
💡 The TV has power, as indicated by the light, but there's no video, and it shuts off soon after turning on.
🛠️ The repair involves opening the TV by removing the back panel using small access holes.
📏 The issue is suspected to be with the ribbon cables connected to the screen, requiring some testing.
✂️ A piece of tape is used to cover certain lines (labeled 2 and 3) on the ribbon cable to isolate the problem.
🔌 After applying the tape and reconnecting the cables, the TV is turned on again, but it continues to shut off.
🔄 The technician continues testing each group of three lines on the ribbon cables until the problem area is found.
✅ After finding the issue, the TV stays on, and the video returns, although some lines appear on the screen due to excess tape.
🎉 Once the tape is trimmed correctly, the TV works perfectly, and the repair is complete.

Q & A

What is the main issue with the Samsung TV mentioned in the video?
-The Samsung TV has a problem where it turns on and off repeatedly without displaying any video.
What model of Samsung TV is being repaired in the video?
-The model of the Samsung TV is A155KS8000EFE.
What initial steps does the technician take to diagnose the problem?
-The technician first turns on the TV to show that it powers on but quickly shuts off again, indicating that there is power but no video.
What method does the technician use to open the TV?
-The technician uses a simple method of inserting a tool into small holes located on both sides of the TV to open the back cover.
What is the solution the technician suggests to fix the TV?
-The solution involves placing a small piece of tape over certain ribbon cables that correspond to the lines in the display. This helps isolate the faulty lines and restore video functionality.
How does the technician determine which lines on the ribbon cable are causing the issue?
-The technician tests the ribbon cables by placing a small piece of tape over different sets of three lines and reconnecting the TV to see if the issue is resolved.
What does the technician suggest doing if the TV continues to turn off after the initial test?
-If the TV continues to turn off, the technician recommends repeating the process, adjusting the tape over different sets of three lines until the correct ones are found.
What happens when the tape used is too wide?
-When the tape is too wide, it covers more lines than necessary, which causes visual artifacts, such as lines on the screen.
How does the technician adjust the tape to fix the issue with the lines on the screen?
-The technician cuts a smaller piece of tape to cover only the problematic lines and reattaches the ribbon cables. This removes the lines on the screen and restores proper video output.
What final advice does the technician give about the repair process?
-The technician advises that this issue and repair method apply to several Samsung TV models. They also encourage viewers to stay tuned for similar videos on repairing other TV brands like TCL.