Re: Dell U2713Hb No Display
So that regulator is 12V regulator, and more likely to be LDO type which will usually require about 2V differential Voltage between Input and Ouputt to properly regulate the output Voltage, so what is the input Voltage feeding the regulator pin?
'That was all tested with the timing controller board disconnected'
That switched MOSFET will not have any load connected to it if the LVDS cables are not connected so it should barely drawing any current, you should check the resistance. against GND on the output side of that MOSFET.
It may have bad MLCC (Multi Layer Ceramic Capacitor) on the output side of the MOSFET.
You can see the output pins of the switched MOSFET are connected to the Lytics cap, then is fed to two inductors (L18, L??), and two bleeder resistors to GND, and MLCC filter cap C815 and then the power pin of the LVDS conector.
So that regulator is 12V regulator, and more likely to be LDO type which will usually require about 2V differential Voltage between Input and Ouputt to properly regulate the output Voltage, so what is the input Voltage feeding the regulator pin?
'That was all tested with the timing controller board disconnected'
That switched MOSFET will not have any load connected to it if the LVDS cables are not connected so it should barely drawing any current, you should check the resistance. against GND on the output side of that MOSFET.
It may have bad MLCC (Multi Layer Ceramic Capacitor) on the output side of the MOSFET.
You can see the output pins of the switched MOSFET are connected to the Lytics cap, then is fed to two inductors (L18, L??), and two bleeder resistors to GND, and MLCC filter cap C815 and then the power pin of the LVDS conector.
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