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40 pin TFT Backlight turn up

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Arya Kumar

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Hello all,

Thanks for your previous input on Oscillator Circuit.
I am making a proto-board, which i have done taking base board design from Stm32f429zit6 Discovery Board.
I am using a different tft from that of Discovery board.

Right now i am validating all peripherals, I am facing issue in turning on the TFT backlight.
As to the pin diagram i have supplied 12 Volts, and also supplied 3V3 volts and GND to respective pins.
But still TFT is not turning on. I also see DISP pin , i am not sure whether that pin needs to be pulled high to turn on the backlight.
I even tried that, but didn't work out. Any ideas what wrong could i be doing.
Please help
Datasheet -> https://drive.google.com/file/d/0B2z1DhUl-YnDUmRaaDI4Sm5lWFJ2MU9Dc1VxSHJFVlk1VFpn/view?usp=sharing
I also connected it to my RPI and it works.
What wrong i am doing.
 

If you actually read the data sheet youd see that you need 24 volts for the leds
 

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