ILI9341 TFT Moderators: adafruit_support_bill, adafruit

[raminr]

Hello,

We are trying to use this TFT by SPI (Attached the picture of this TFT).
We use it as 4-wire SPI and following signals are connected:
MISO, MOSI, CLK, D/C
CS is connected to GND (always selected).
IM1,2,3 are jumpered.
D0-7 are connected to GND.

The signals seems OK from the master to the TFT (we checked them by Scope).
For the test, we try to turn off the back lite by writing 53h when D/C is low and then 00 when D/C high but the back lite does not turn off.
We also tried to read the ID but it is always 00.

Please help us what is wrong here.

Best Regards,
Ramin