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LG Flatron 776FM 17" CRT Monitor - Page 5 Questions & Answers
Screen goes black after 2 sec
The lightbulb high voltage power supply is detecting problem with the low voltage power supply or with one of the light bulbs and shutdowns in emergency. Open the monitor and check for inflated capacitors. Replace all capacitors even if only few are inflated. Light bulbs require further testing empowering them one by one with external high voltage por supply and their replacement is not easy. Have to open the LCD and then it's hard to clean the layers from the dust resulting bad spots on the image. Be careful and good luck.
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