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LCD TV Repair

LCD TV repair problems often involve no power, no picture/sound, lines on the screen, or remote issues, usually stemming from faulty power supply boards (bulging capacitors), main boards (processing), TCON boards (image timing), or loose connections/cables, requiring diagnosis of these key components or the panel itself, with common fixes including component replacement or board swaps, though cracked screens are usually uneconomical to repair

 

Common Problems & Causes:
  • No Power/Won't Turn On: Faulty power supply board (PSU) – check for blown fuses, bulged capacitors.
  • No Picture/Black Screen (but sound/power present): Backlight failure (LED strips), TCON board issues, or main board failure.
  • Lines on Screen (Vertical/Horizontal): Vertical lines often mean TCON board; horizontal lines might be panel connector issues (try gently squeezing the frame).
  • Flickering/Distorted Picture: Loose ribbon cables to TCON or panel, main board, or TCON board.
  • No Sound: Speaker issues, main board, or audio processing circuits.
  • Remote Not Working: Batteries, IR sensor, or main board. 
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