Hi there. New to this forum. But been reading a lot of posts and comments. Very informative and helpful. Ok here's my TV problem:
Turned on the tv one day, heard the TV clock, then buzzed for a second. No signs of life on screen through whole process. Red LED flashes 6 times in sequence. Only way to sut down TV is to unplug it from the outlet. This fault was not gradual overtime. I took the back over off, and visually inspected the psb. No burn marks on surface. All caps looked normal except one. A 250v 300 uf top one on the right side- The top looks flat- kinda-Borderline bulging. Unplugged the TV for a bit, then tried powering it up again. I saw a green led flash on the ysus board and on the xmain for an instant. TV buzzed and clicked. No signs of life. Did some test with components unplugged. First unplugged the ysus from psb, then powered it up. That resulted in the TV repeating startup, And ending now with 7 flashes of the LED instead of the original 6. Unplugged TV, then plugged ysus in and disconnected xmain from psb. Plugged TV back in, powered it on and I repeated the starting process ending with the original 6 blinks. Then I did the same test with the main board unplugged from the psb. When trying to power up, there was no buzzing or clicking, no red blinks on the front or led flash on the ysus or xmain. I assume that the xmain was the fault so I took the board off the back to check it visually. I couldn't see anything that look suspicious on the board, but the back panel of the TV where the xmain was, is covered in a light sooty coating. I wiped a section of it and it came off cleanly. Assumed from my limited knowledge of electronics that something on the board maybe burning off. But I wanted to see if the condition was normal under some of the boards so I took a look under the ysus, and that also had the sooty residue under the majority of the area under it. I haven't test for voltage yet. But will do when I have a chance. But as of now any help or advice on fixing the issue would greatly help. Tia. �� can't seem to upload more than 1 photo...?
Turned on the tv one day, heard the TV clock, then buzzed for a second. No signs of life on screen through whole process. Red LED flashes 6 times in sequence. Only way to sut down TV is to unplug it from the outlet. This fault was not gradual overtime. I took the back over off, and visually inspected the psb. No burn marks on surface. All caps looked normal except one. A 250v 300 uf top one on the right side- The top looks flat- kinda-Borderline bulging. Unplugged the TV for a bit, then tried powering it up again. I saw a green led flash on the ysus board and on the xmain for an instant. TV buzzed and clicked. No signs of life. Did some test with components unplugged. First unplugged the ysus from psb, then powered it up. That resulted in the TV repeating startup, And ending now with 7 flashes of the LED instead of the original 6. Unplugged TV, then plugged ysus in and disconnected xmain from psb. Plugged TV back in, powered it on and I repeated the starting process ending with the original 6 blinks. Then I did the same test with the main board unplugged from the psb. When trying to power up, there was no buzzing or clicking, no red blinks on the front or led flash on the ysus or xmain. I assume that the xmain was the fault so I took the board off the back to check it visually. I couldn't see anything that look suspicious on the board, but the back panel of the TV where the xmain was, is covered in a light sooty coating. I wiped a section of it and it came off cleanly. Assumed from my limited knowledge of electronics that something on the board maybe burning off. But I wanted to see if the condition was normal under some of the boards so I took a look under the ysus, and that also had the sooty residue under the majority of the area under it. I haven't test for voltage yet. But will do when I have a chance. But as of now any help or advice on fixing the issue would greatly help. Tia. �� can't seem to upload more than 1 photo...?
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