Black Screen, No Backlight - Next Steps in Troubleshooting?
Hisense LED 55A6G… it’s only a couple years old and suddenly wouldn’t turn on one day according to the previous owner.
I’ve done the basic troubleshooting of powering it off, holding the power button then turning it back on, etc. The red power button light flashes two times long, then a very quick two times and goes solid red again.
Capacitors that I can see look good.
Power cord has continuity.
I don’t see any panel lights at all.
Flashlight test, I can’t see if it’s trying to show a picture or not.
TCon board makes a brief buzzing sound when power lights flash two long times.
What’s the next step in troubleshooting?
I’m a computer guy, have done a few electronics projects and repairs, etc, but I’m pretty new to TVs. YouTube is a dead end at this point or I’m looking in the wrong places.
TIA
Is this a good question?
2 Comments
Testing voltage where the LEDs plug into the main board, I get a measure of 131v, then a quick drop to 0.03v after the two quick flashes. Does that add some clarity?
by Dan
Disconnecting TCon board and pressing the power button, I get the two long red flashes, but instead of going back to solid red, the standby LED just stays off. Taking other evidence into account, might this mean TCon board is bad?
by Dan