Hi guys, I'm a long-time reader however new to posting here! Thanks to your previous expertise I was able to resurrect a Samsung LCD TV with faulty capacitors!👍
The mission I'm on today however, is repairing our Sony 55EX720 LED TV.
A couple of days ago my 3yr old thought cleaning the TV with windex was a good idea. We still had picture, however quite liney which then ended in "4 red blinks" and a blank screen.
After reading a couple other threads, I disassembled the TV focussing on the T con board and display panel. Now, I assume the windex ran to the bottom of the screen and onto the circuit board fixed to the display and has caused a short. I cleaned the boards down with some contact cleaner and reassembled. I then had a blank screen when powering up, and occasionally picture (and sound) with a solid blue (?) vertical stripe on the centre left hand side of the display about 6" wide. After re-powering a few times I then had a blank screen with "5 red blinks" instead of 4 previously and unable to get any picture or sound? 🤔
Following this, I played around for a while and discovered;
-If I remove both ribbons the TV has sound (obviously no picture).
-If I plug in the "left" ribbon only I have no picture.
-If I plug both in I have no picture.
-If I plug in the "right" ribbon only, I do have a right hand picture.
I'm wondering where to go from here, if it's worth replacing the t-con (having suffered a short?), or if the problem lies in the display and attached circuit board (being the component that would've been soiled). Should I try plugging the left hand ribbon into the right hand plug to see if the display fires up, identifying either a panel or board fault? (Was not sure if it could be done)
Any advice would be appreciated!
Regards.
The mission I'm on today however, is repairing our Sony 55EX720 LED TV.
A couple of days ago my 3yr old thought cleaning the TV with windex was a good idea. We still had picture, however quite liney which then ended in "4 red blinks" and a blank screen.
After reading a couple other threads, I disassembled the TV focussing on the T con board and display panel. Now, I assume the windex ran to the bottom of the screen and onto the circuit board fixed to the display and has caused a short. I cleaned the boards down with some contact cleaner and reassembled. I then had a blank screen when powering up, and occasionally picture (and sound) with a solid blue (?) vertical stripe on the centre left hand side of the display about 6" wide. After re-powering a few times I then had a blank screen with "5 red blinks" instead of 4 previously and unable to get any picture or sound? 🤔
Following this, I played around for a while and discovered;
-If I remove both ribbons the TV has sound (obviously no picture).
-If I plug in the "left" ribbon only I have no picture.
-If I plug both in I have no picture.
-If I plug in the "right" ribbon only, I do have a right hand picture.
I'm wondering where to go from here, if it's worth replacing the t-con (having suffered a short?), or if the problem lies in the display and attached circuit board (being the component that would've been soiled). Should I try plugging the left hand ribbon into the right hand plug to see if the display fires up, identifying either a panel or board fault? (Was not sure if it could be done)
Any advice would be appreciated!
Regards.
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