Originally Posted by hpman247
Well, It's happened again. I had to come back here and search the posts to see what exactly my proble, was the last time, and it appears to be the same again. The TV makes the ususal sound when it's booting up, the LED light blinks about 20 times, then it cycles again, 20 blinks, cycles one more time, and then I get the 3 blinking lights.
It was the LED Board last time, so I'm assuming it's the same again.
I replaced the DMD chip a few months ago to fix the white specks, and it was pretty easy. I found a service manual online, and a few videos on YT, so tonight I took out the whole assembly and looked at the LED Driver Board. It looked ok, smelled ok, but I'm guessing it's fried. It has no heat sinks on it, and it's been in use for the past 5 years. Seems plausible.
Anyways I went ahead and bought a VIZIO E70-C3, but I'm still planning to repair this one over time. If it's not the Driver board, I guess it's the SMPS or the DMD board.
One thing that I can tell is similar to last time is that the TV at boot always goes from a pitch black, to a brightened black when you turn it on. It lasts only for a second before the picture pops up. This does not happen now. The screen just stays pitch black, as it did when the LED Board failed in 2010.
I'll test all the LEDs with a 9v battery tomorrow, and try to figure out exactly how to use the multimeter to test the SMPS for the 16v pins. I don't know if I'll do it right, but I'll give it a shot.
Originally Posted by hpman247
I just took a closer look at the subSMPS board.. It appears that the capicitors are bulging. The 4 on the left side pf it are bulding badly. The lone capicitor on the right isn't bulging.
One the Main Power board, none of the caps are bulging.
Should I replace the sub9SMPS board, you think?
Just to update for anyone else who has this issue.
I replaces the sub smps board with one I purchased on eBay, and it took care of the problem. The TV booted up, but only the red LED was working. I'd literally taken the whole LED assemble apart anyway, so i just remved the heatsinks again, popped off the LEDs, made sure the connections were ok, then left them out, plugged the TV back in and saw that all 3 lit up. <<<That may not be safe or advisable, but I turned off the set immediately after I saw all three color illuminate.
So, I cleaned off all the thermal paste, reapplied some arctic silver, and put it all back together. At this point the tv booted up, all LEDs were working and all was well. I'll probably just put the TV in storage right now since I bought the 70" Vizio. I'll keep it around for when I move in a few years and have an extra room or two that could use a TV.
This TV is really easy to take apart and you can find the service manual for free just by googling it. Good luck on any future repairs all.
I checked the service menu MUTE - 1 - 8 - 2- POWER, and saw my LED life is at 32,000 hours. Looks like it's about reached middle age