Samsung LE37A451C1 dark area on the right lower side.

[rulex]

Hi lads, TV working fine except that what it has a dark area on the right lower side. Also, the previous picture stays on the screen. When Tcon flex cable disconnected from the screen, a screen is clear white. All Voltages and capacitors checked and look OK. Looking advise from colleagues with experience, could there be faulty TCON.
Chassis: GCR37SE
TCON: CPT-370WA03C
POWER SUP: BN44-00217A
MAIN: BN41-00983A