INSIGNIA NS-LCD42HD BACKLIGHT INVERTER KIT 27-D011766 (I420H1-20B)
Compatible TV Models
TX-42F430S VK-42F240S VM-42F140S
LT-42X788 LT-42DR9BJ LT-42EM59 LT-42P789 LT-42X579 LT-42X688
Horizontal lines on the screen are NEVER caused by a board. Horizontal lines indicate a defective LCD panel (screen) no part except a NEW screen will fix it.
VERY IMPORTANT:The board was extracted from a TV working correctly with a broken screen.