I found this TV noted as "won't turn on" and grabbed it as an upgrade for one of my smaller sets. I got it home, plugged it in and it worked perfectly (see first pic). I does take a very long time for the initial standby to kick in (logo flashes 90-something times before going solid amber).
After about 15 or 20 minutes, I walked back by it and noticed that sound was still on, as was backlight, but the picture was now blank. It would not power off via the remote, so I pulled the power. At this point, I've seen references to this behavior on the internet (and I believe here) related to a t-con issue. I plugged it in, and it hasn't powered on since. At least, not properly. After the painfully-long blinking to a steady amber logo, pressing the power button (side or remote) turns the logo solid white, and 12v goes hot. After two minutes, it shuts down, begins the long sequence of flashes and attempts to power on again. Rinse and repeat with the two minutes of white logo until a reboot.
The 5.1v is always present, 12v comes on with the white logo. All fuses are good (main board, power supply and t-con). There is a flashing blue LED on the LED driver board, I did not see it when the TV initially worked so I don't know if it was steady at that point. I isolated the t-con, then the LED driver board, with no change in behavior (though I didn't really expect to see any changes).
Is there a service manual available, and have these sets been seen enough to build a familiarity and "common cause" knowledge? It now acts like a typical Vizio bad eeprom, but what bugs me is that initial time when it did work (before it somewhat froze). Are the eeproms available for these, versus replacing the entire main board (if that's what it turns out to be)?
After about 15 or 20 minutes, I walked back by it and noticed that sound was still on, as was backlight, but the picture was now blank. It would not power off via the remote, so I pulled the power. At this point, I've seen references to this behavior on the internet (and I believe here) related to a t-con issue. I plugged it in, and it hasn't powered on since. At least, not properly. After the painfully-long blinking to a steady amber logo, pressing the power button (side or remote) turns the logo solid white, and 12v goes hot. After two minutes, it shuts down, begins the long sequence of flashes and attempts to power on again. Rinse and repeat with the two minutes of white logo until a reboot.
The 5.1v is always present, 12v comes on with the white logo. All fuses are good (main board, power supply and t-con). There is a flashing blue LED on the LED driver board, I did not see it when the TV initially worked so I don't know if it was steady at that point. I isolated the t-con, then the LED driver board, with no change in behavior (though I didn't really expect to see any changes).
Is there a service manual available, and have these sets been seen enough to build a familiarity and "common cause" knowledge? It now acts like a typical Vizio bad eeprom, but what bugs me is that initial time when it did work (before it somewhat froze). Are the eeproms available for these, versus replacing the entire main board (if that's what it turns out to be)?
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