LCD TV Display Failure Symptoms and Possible Causes – 33 Cases

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Hi Geeks! In this new post of today, we are gonna learn something new about LCD TV Display Panels. We will take a look at LCD TV Display Failure Symptoms and Possible Causes. It’s gonna be a complete guide, Hope you would love it. So Let’s Start with it…

LCD TV Display Failure Symptoms and Possible Causes
LCD TV Display Failure Symptoms and Possible Causes

Below you will see a Panel Failure Image and then the symptoms of that failure, so you can solve your display panel issues accordingly.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 1

Case 1-Abnormal Display. T-Con, Solder defect, 1 or more cable connector Broken or with bad solder connections.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 2

Case 2-Abnormal Display. T-Con, Solder defect, 1 or more cable connector Broken or with bad solder connections.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 3

Case 3-Abnormal Display. T-Con, Solder defect, 1 or more cable connector Broken or with bad solder connections.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 4

Case 4-Abnormal Display. T-Con, Solder defect, 1 or more cable connector Broken or with bad solder connections.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 5

Case 5-Abnormal Display. T-Con, Solder defect, 1 or more cable connector Broken or with bad solder connections.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 6

Case 6-Abnormal Display. Bad components in power section of t-con.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 7

Case 7-Noise. Solder defect or shorted components on t-con.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 8

Case 8-Abnormal Display. Bad components in power section of t-con.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 9

Case 9-Noise. Solder defect or shorted components on t-con.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 10

Case 10-Abnormal Display. Bad components in power section of t-con.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 11

Case 11-Abnormal Display. Bad components in power section of t-con.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 12

Case 12-Noise. Bad solder connections, shorted or open components on t-con.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 13

Case 13-Noise. Bad solder connections, shorted or open components on t-con.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 14

Case 14-No display and back lights are lit. T-con Fuse Open or Bad components in power section of tcon. No voltage to t-con from main board or power supply(main board or power supply failure).

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 15

Case 15-No back light. Inverter failure or power supply failure.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 16

Case 16-Dim back light. Inverter failure.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 17

Case 17-Dim back light. Inverter failure.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 18

Case 18-Dim back light. Inverter failure.

Replace or repair T-con/LCD controller board (also possibly main or PSU board for case 14) for cases 1- 14.

Replace or repair inverter and or PSU board for cases 15-18.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 19

Case 19-Uneven display. cell defect.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 20

Case 20-Uneven display. cell defect.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 21

Case 21-Damage from applied pressure to panel. Bad panel

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 22

Case 22-Crosstalk. cell defect.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 23

Case 23-Crosstalk. cell defect.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 24

Case 24-Panel cracked.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 25

Case 25-Vertical block. Failed driver IC, TCP/COF failed ACF bonding to panel bad connection
from driver IC to TCP/COF.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 26

Case 26-Vertical line. Failed driver IC, TCP/COF failed ACF bonding to panel, bad connection
from driver IC to TCP/COF.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 27

Case 27-Vertical block. Failed driver IC, TCP/COF failed ACF bonding to panel, bad connection
from driver IC to TCP/COF.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 28

Case 28-Vertical block. Failed driver IC, TCP/COF failed ACF bonding to panel, bad connection
from driver IC to TCP/COF.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 29

Case 29-Horizontal block. Failed driver IC, TCP/COF failed ACF bonding to panel, bad connection from driver IC to TCP/COF.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 30

Case 30-Horizontal block. Failed driver IC, TCP/COF failed ACF bonding to the panel, bad connection from driver IC to TCP/COF.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 31

Case 31-Horizontal line. Driver IC abnormal output. Failed driver IC, TCP/COF failed ACF bonding to panel, bad connection from driver IC to TCP/COF.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 32

Case 32-Horizontal block. Failed driver IC, TCP/COF failed ACF bonding to panel bad connection from driver IC to TCP/COF.

LCD TV Display Failure Symptoms and Possible Causes - 33 Cases
Case 33

Case 33-Horizontal block. Failed driver IC, TCP/COF failed ACF bonding to panel bad connection
from driver IC to TCP/COF.

Replace LCD panel for cases 19-24.

Replace LCD panel or devise a technique for repairing bonding failure of TCP/COF for cases 25-35.

List of acronyms and abbreviations used and their meanings

  • COF= Chip on film/flex
  • TCP= Tape carrier package
  • IC= Integrated circuit
  • T-con= Timing controller(board)
  • LCD= Liquid crystal display
  • ACF= Anisotropic conductive film

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