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TFT QVGA display: howto?

Thu Mar 26, 2020 4:42 pm

Is there a troubleshooting guide for TFT displays? I did not find.

Can anyone please give me any pointers?

I have 3x tft displays two from Adafruit 800x400 & 480x272 work as expected using their 40 pin friend.

however a recently purchased Texim Winstar 320x240 display does not,
the bright backlight comes on very briefly,
and a greyscreen is seen, no colour.

the pinout appears identical (bar a couple of seemingly minor differences),
pin number order is same direction
the voltages are also similar, 3.3v 12ma, 19.2v 20ma
the current is perhaps a little high, but I tried adding resistors without effect.


timings are adjusted for screen size, 480x272 displays with qvga timings

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