Issue with the official demo HEX files from the STM32H7B3I-EVAL

[vijayajangam]

Hello,

I am using the STM32H7B3I-EVAL board with STM32H7B3LIH6Q controller.

I downloaded and flashed the official demo HEX files from the STM32H7B3I-EVAL package provided on the ST website. Programming is now successful, but I am facing an issue with the TFT display.

Problem:

• TFT backlight turns ON
• No graphics, logo, GUI, or display output appears on screen
• Screen remains blank/black
• In some demo files (for example: STemWin-STM32H7B3I-EVAL_V1.0.1.hex), all 4 user LEDs              PG13(1) LED1
    MFX IO11 LED2
    MFX IO12 LED3
    MFX IO13 LED4  turn ON after boot

I already checked:

• TFT ribbon/cable connection
• Successful flashing through STM32CubeProgrammer
• Multiple demo HEX files from the package
• Power supply and ST-LINK connection

Still, nothing is displayed on TFT.

Could anyone please suggest:

1. Whether external memory (OSPI/QSPI SDRAM) initialization may be failing?
2. Whether this issue is related to LTDC/display clock configuration?
3. Whether all 4 LEDs ON indicates a BSP/display initialization failure?
4. Whether any specific boot switch or hardware revision dependency exists for these demo HEX files?

These details are of Board

• LCD daughterboard: MB1370-LCD-B02 — shown in the red rectangle
• Main board: MB1331 H7B3LIQ-D04 — shown in the yellow rectangle

Thank you

Vijaya.

[mƎALLEm]

Hello,

You shared pictures with a bad resolution.

I don't know if you've selected the right flash loader in the first picture: MX25LM51245G_STM32H7B3I-EVAL? as indicated in the readme file.