LG 50PC1DR - - 50" Plasma TV Troubleshooting Manual page 57

Troubleshooting
Control Board : If the buffer IC has failed, there can be vertical lines.
The defect can not be repaired if the vertical line is caused by TCP IC failure.
Root cause of TCP IC failure is ESD or Surge.
< Structure of TCP with X ray analyzer >
< metal particle between the electrode >
< Failure viewed with microscope >
Plasma Display Panel Troubleshooting - 2007
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