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#1 |
New Member
Join Date: Oct 2019
City & State: Lyons, IL
My Country: USA
I'm a: Knowledge Seeker
Posts: 10
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![]() Hi,
This is my first post here... Last night my TV broke. I was streaming a show and the TV froze. When I attempted to turn it off/and back on all I get is a black screen. The power led indicator goes on for about 20 seconds, then it blinks 15 times and the TV restarts... it does that again and then it powers down. I don't see anything at all on the screen, no logo or anything at all. I tried the suggestions from the Vizio website including unplugging, holding the power button for 30 seconds and plugging back in. No differance. I unplugged overnight and no change. So, I took it apart and so far I cannot see any obvious damage. I followed some advice from a YouTube video and measured the following voltages from the output pins on the power board: CN9102 Pin / Listed on Key / Actual when plugged in / Actual Powered on 2 / +5V +3.5 / 0 / 5.12 4 / +12V / 19.08 / 19.08 6 / +12V / 19.08 / 19.08 8 / +12V_A / 19.08 / 19.08 10 / GND / 0 / 0 12 / GND / 0 / 0 14 / PS_ON / 0 / .006 16 / DIM / 0 / .009 CM9101 Pin / Listed on Key / Actual when plugged in / Actual Powered on 1 / +5V +3.5 / .001 / 5.118 3 / +12V / 19.08 / 19.06 5 / +12V / 19.08 / 19.06 7 / +12V_A / 19.08 / 19.08 9 / GND / 0 / .002 11 / GND / 0 / .002 13 / 3D / .001 / 0 15 ON-OFF / .001 / .157 CM9203 Pin / Listed on Key / Actual when plugged in / Actual Powered on 2 / DIM / 0 / 3.32 4 / +12V / 19.08 / 19.08 6 / GND / 0 / .005 8 / GND / 0 / .005 10 / +24V / .001 / 24.65 12 / +24V / .001 / 24.54 14 / +24V / .001 / 24.53 CM9201 Pin / Listed on Key / Actual when plugged in / Actual Powered on 1 / ON-OFF / 0 / .03 3 / 3D / 0 / 0 5 / GND / 0 / 0 7 / GND / 0 / 0 9 / GND / 0 / .002 11 / +24V / .001 / 24.52 13 / +24V / .001 / 24.52 As far as I can tell these voltages look ok. Are they? The only other thing I noticed is when I tested the long transistors (I think they are called that?) for continuity there was only one that beeped... it is in the picture: FB9202 If there are any suggestions for further troubleshooting I would really like to save this TV... I don't have the money to buy a new one right now... thanks for your help! |
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