Hisense LCD TV TLM26V68 boot screen flashes on the black screen fault repair record - appliance repair - Huaqiang electronic network

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Model: Hisense LCD TV TLM26V68

Power on a try! Black screen protection under the screen! Obviously seeing the dark and bright, is it necessary to dismantle the lamp for replacement?

No! Still have to try whether it is a problem with the lamp, but what if you don’t have a lamp on your hand?

Drop the board! Try connecting the lamp? ? ?
Haha! It is bright and dark, not a problem with the lamp! ! ! !

The four sets of lamps are symmetrical! With the resistance method, the resistance values ​​of the four groups of booster circuits are measured on the board, and the amount is the same for a long time, all the same!
It’s in vain! Power-on voltage method to deal with: 47 table AC file 1000V, the lamp voltage voltage above is 800V, the lamp pointer below is coming to an end!
Obviously the above voltage is not enough! No gains in the resistance method, decisively check the capacitance of the boost input!
Haha! endless good news…………