Hi,
I'm getting a backlight issue with the integrated LCD monitor. The LCD display itself is working well as the image can be seen when applying an external light source.
There is a hall sensor for detecting opening/closure of the display. When opened, voltage is supplied to IC908. However no oscillation occurs at none of the inverting gates within IC908. I assume IC908 is where the oscillations take place, then go to T901 through Q902, for finally driving T902.
But I don't know which component to check for the no-oscillation symptom. IC908 seems to be OK as each gate's output shows an inverted input.
Could you please help me understand what could be wrong
I'm getting a backlight issue with the integrated LCD monitor. The LCD display itself is working well as the image can be seen when applying an external light source.
There is a hall sensor for detecting opening/closure of the display. When opened, voltage is supplied to IC908. However no oscillation occurs at none of the inverting gates within IC908. I assume IC908 is where the oscillations take place, then go to T901 through Q902, for finally driving T902.
But I don't know which component to check for the no-oscillation symptom. IC908 seems to be OK as each gate's output shows an inverted input.
Could you please help me understand what could be wrong
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