This is a LG CRT Monitor. (White color, 15 inches, Not a Flat Screen). Its flyback transformer was replaced 3 years ago. Recently the picture was going into dark after about 2 hours of working. Finally it was completely dead. Now yellow light is flashing and when the computer is on, it becomes green and monitor automatically off. I heard some high pitch sound on the screen before it off. I opened it and checked and found that Main filter capacitor has a puffy head. I replaced it with a new one. But no any change happened. I replaced several electrolytic capacitors on primary and secondary power supply section. But no any changed happened. Is it can occur due to faulty STR? Is it needed to replace all the electrolytic capacitors? I checked all the diodes, transistors and resistors in the power supply section and horizontal deflection system. No any fault found. I like to know how to repair it. Please help me.
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