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STM32H747I-DISCO LCD DISPLAY PROBLEM

robisonjunior
Associate II

Good afternoon everybody,

I bought an STM32H747I-DISCO, and installed the TouchGFX demo software.

When I turned on the board, the demonstration ran perfectly on the LCD display, but after a few seconds, the images on the display started to show problems, as shown in the photos.

If I disconnect and connect the USB cable, the problem continues, but if I disconnect and wait a few minutes, and turn it on again, the display starts perfectly and after a few seconds the problem appears again.

I'm using St-Link v3 USB power.

Has anyone had this problem?

Thanks!20240223_135841.jpg20240223_140354.jpg20240223_135726.jpg20240223_135814.jpg20240223_142126.jpg

 

Jr
4 REPLIES 4
SofLit
ST Employee

Hello,

It could be an issue related to the LCD.

If you have a chance to have another LCD, could you please do a test with it?

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.

Hi,

I have another one in the box. I will open it to test.

I'll let you know the result soon.

Thanks,

Jr

Jr

Dear @SofLit ,

I  tested a brand new STM32H747I-DISCO board, opened the box, and installed the TouchGFX demo software again.

I had a similar problem, but this time it took about 1 minute for the defect to appear.

As I bought the 2 boards at the same time from Digikey.com, I believe the problem could be the LCD batch, what do you think?

This new LCD has serial number: MB1166-A09 A23080445

Can I buy just the LCD to change the boards? Could you tell me the model and if I can find it on Mouser.com or Digikey.com?

Have a good day!

Thanks,

Jr

Jr

Hello,

It could be a batch LCD issue.

You can refer to these threads for more help:

https://community.st.com/t5/stm32-mcus-products/stm32h747i-disco-b-cams-omv-cannot-run-webcam-or-people-detect/m-p/134674#M25271

https://community.st.com/t5/stm32-mcus-touchgfx-and-gui/flash-screen-of-stm32h747i-disco/m-p/71319

 

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.