Emerson Funai LC401EM2F
Long time listener, first time caller. I've referenced badcaps numerous times in the past, but this is my first post. I'm a computer technician and have soldering experience. In the past, I've replaced a lot of visibly bad caps to bring numerous boards [computer mobo's, monitors] back to life... I've only done a few TV's and it's usually been caps or a diode that's been the culprit. But this time, I can't find any single bad component. Even if I can't repair, I wouldn't be opposed to ordering a replacement board IF I could verify which one it needs.
I'm attempting to fix this for a friend who said it just didn't come on one day. They could hear sound, but no picture. They were using the coax input from a satellite receiver. Here, at work, I only have access to HDMI & AV inputs to test with.
When the power button is pressed, I can hear a relay click and the power light comes on, but other than that it's unresponsive. No backlight, no image I even tried to use a flashlight to see if the screen was on without backlight - but it wasn't (I've done this with laptops and monitors successfully in the past). The tv acts like it's on, according to the power light, and will stay that way until the power button is pressed again, then it blinks a few times and shuts off.
Searching the forums, I could find this model, but their problem/solution was different. My main 8A fuse shows continuity. I found 14 questionable diodes on the power board, however, when they were removed from the circuit they all tested fine. I have 3 questionable ones on the main video board that haven't been pulled yet. An expert opinion would be helpful right about now. FYI this TV has a 3rd board for HDMI, that I haven't even removed yet.
Long time listener, first time caller. I've referenced badcaps numerous times in the past, but this is my first post. I'm a computer technician and have soldering experience. In the past, I've replaced a lot of visibly bad caps to bring numerous boards [computer mobo's, monitors] back to life... I've only done a few TV's and it's usually been caps or a diode that's been the culprit. But this time, I can't find any single bad component. Even if I can't repair, I wouldn't be opposed to ordering a replacement board IF I could verify which one it needs.
I'm attempting to fix this for a friend who said it just didn't come on one day. They could hear sound, but no picture. They were using the coax input from a satellite receiver. Here, at work, I only have access to HDMI & AV inputs to test with.
When the power button is pressed, I can hear a relay click and the power light comes on, but other than that it's unresponsive. No backlight, no image I even tried to use a flashlight to see if the screen was on without backlight - but it wasn't (I've done this with laptops and monitors successfully in the past). The tv acts like it's on, according to the power light, and will stay that way until the power button is pressed again, then it blinks a few times and shuts off.
Searching the forums, I could find this model, but their problem/solution was different. My main 8A fuse shows continuity. I found 14 questionable diodes on the power board, however, when they were removed from the circuit they all tested fine. I have 3 questionable ones on the main video board that haven't been pulled yet. An expert opinion would be helpful right about now. FYI this TV has a 3rd board for HDMI, that I haven't even removed yet.
Attached Files
Those yellow caps are SamYoung and if I recall are not great.
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