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Remove the display stand by removing the two screws on the round plate on the back of the monitor.
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Open up the back of the display (place it face down on a cloth to avoid scratches) by carefully releasing the latches using a screwdriver or opener tool.
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The metal cage housing the PCBs is stuck to the backside of the LCD.
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Carefully remove the adhesive strips, then release the cables to the LCD and front panel buttons.
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Remove the SMPS PCB (switching mode power supply) by removing the screws around it.
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Desolder the transformer from the power board. It has 6 pins on one side and 4 pins on the other.
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Replace with a new transformer. (Model no. TM-09176)
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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Caution!
Myrra 12 V AC Transfor 5VA is not compatible with TM09176
Hi, I have the same issue with the same monitor. But in my case, the transformer has equal temperature on both sides. Is there any way for me to check if it’s really the transformer or something else?
One more thing, there is a high-pitched noise coming from the upper part of the screen (probably the backlight), after the screen goes dark again. Thanks!
High pitched noise is probably the resonance of a coil either the transformer or another inductor of the swtiching regulator circuit.
You could try and measure the inductance / resistance of the transformer (desolder first) and check if they match very closely.
I took some thermal images (using SeekTermal camera) from the power-supply board of this TV:
The rectangular black transformer TM-09176 (T301) gets 60°C at one side only. But the resistor R301 beside the transformer, gets nearly 100°C! This is maybe due to unregulated high current coming from the transformer? The rest of the board stays very cool.
Measure if there is any short circuit to ground with resistance or continuity mode around the resistor that gets hot.
Maby the CCFL Tube or wire is shorted ?
