Display Failure, HDMI Surge
My LV9500 finally stopped working today. The display on the TV stopped working when I hit the connection between my keyboard and its USB extension, which is plugged into my desktop, the only input connected to the TV. Both the TV and desktop share the same UPS. Extremely weird that a USB surge would be able to propagate to the TV and blow some circuitry, but that’s obviously what happened.
It’s worthy to note that the TV stopped displaying a picture when I hit the USB extension/keyboard connection (the USB extension runs across the room), but this was resolved easily with rebooting the desktop. For the past month, I did notice the picture and audio cutting out (at the same time) for ~1 full second, showing a few thin, red, horizontal bands. (I wasn’t certain at the time if this was an issue with the desktop or TV.)
The remote still works to turn the TV off and on. The red LED power-off light is lit when the TV is off. Upon powering the TV on, the aforementioned LED turns white, with all LED white indicator lights to its left lighting up as well (home, input, vol, etc.). I left the TV off overnight and the display continues to not work. After powering the TV off and unplugging it, the red power-off light is still lit for almost a full minute (caps taking time to dissipate). I have tried blindly cycling through the inputs in an attempt to hear the static from the coaxial cable input, to no avail. I attempted to see if the LCD itself is still displaying a picture, without a backlight. I did this in an entirely dark room, by shining a flashlight on the display after pushing the home button. I was not able to see any picture or textures whatsoever. The TV still makes the capacitor single-click noise when turning on and off.
I have yet to take off the backplate and examine it, though I suspect the main board itself is fried. Still trying to diagnose, find the part number of the main board, and hopefully order another one, if it is the culprit.
4.5 years is not nearly as long as I would like a flagship TV to last (I was hoping for 10), but I am very thankful for all of the insight and support this thread and community has given.
I was hoping to save my money for some studio monitors, to finally get away from TV speakers, but I’ll probably have to get another TV instead. If anyone has any recommendations for a full-array LED TV, 1080p, active 3D, I’m all ears. (A little too much 3D crosstalk in the LV9500 for me.) From what I’ve seen of OLED, it has just broken through its infancy (might be better to hold off for a few more years). 4k would be great, but is not a necessity to me.
Thanks again to nony and everyone here. Your clear, objective responses and comparison the 55LHX were of great help.