Hi everyone. My first thread, hoping for some help.
My grandpa has this e470i-a0, he was watching and the screen went black, sound continued. After a minute or so the sound also stopped. I have it now, I can plug a laptop into an hdmi port and see the picture with the flashlight test. Testing backlight power supply, the voltage should be about 100v but it oscillates between 120-130v, return pins are also out of spec. Obviously the leds are bad. Display panel is LC470DUG-JFR1-KR1-B.
If it worked otherwise the fault would obviously be the led strips, but I can't get sound either. I tried tv buttons and the remote volume up, mute/unmute, etc. but no sound. If I take the same laptop and hdmi cable and plug into another tv, I get sound no problem. Is there anything else I might try?
So, can you help me determine if my vizio has more than one problem (say, bad backlight strips and a bad main board?) or if these two might be related to a single problem (say, weak/failed power supply board)?
PSU board is marked Samsung 0500-0614-0270. I have tested all inputs and outputs to/from the board and they are exactly in spec with the tv on and off.
If I have only one problem to fix I'll probably tackle it, otherwise its for the recyclers.
Thanks.
PS feel free to suggest component-level testing or repair, my soldering skills are up to snuff, though I don't have a lot of advanced equipment.
My grandpa has this e470i-a0, he was watching and the screen went black, sound continued. After a minute or so the sound also stopped. I have it now, I can plug a laptop into an hdmi port and see the picture with the flashlight test. Testing backlight power supply, the voltage should be about 100v but it oscillates between 120-130v, return pins are also out of spec. Obviously the leds are bad. Display panel is LC470DUG-JFR1-KR1-B.
If it worked otherwise the fault would obviously be the led strips, but I can't get sound either. I tried tv buttons and the remote volume up, mute/unmute, etc. but no sound. If I take the same laptop and hdmi cable and plug into another tv, I get sound no problem. Is there anything else I might try?
So, can you help me determine if my vizio has more than one problem (say, bad backlight strips and a bad main board?) or if these two might be related to a single problem (say, weak/failed power supply board)?
PSU board is marked Samsung 0500-0614-0270. I have tested all inputs and outputs to/from the board and they are exactly in spec with the tv on and off.
If I have only one problem to fix I'll probably tackle it, otherwise its for the recyclers.
Thanks.
PS feel free to suggest component-level testing or repair, my soldering skills are up to snuff, though I don't have a lot of advanced equipment.
what did we say about hoarding too much stuff and depriving others of them?! *cough* socialism *cough* lol! 
