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MX8_DSI_OLED1 won't show anything

Question asked by Anton Platonov on Dec 3, 2019
Latest reply on Dec 4, 2019 by Anton Platonov
Hi, I bought NXP iMX8M-mini evaluation board with MX8_DSI_OLED1 and the display shows nothing when I connect it to the board. If I use IMX-MIPI-HDMI converter and connect it to external HDMI display, it works fine.
I tested Test points: TP4, TP5, TP6 (all good ground):
  • TP7 => 4.87v
  • TP8 => 3.31v
  • TP9 => 1.81v
  • TP10 => 0v
  • TP11 => 0v
  • TP12 => 0v
  • OLED_EN => 0v
 
It looks like the display is not being enabled, so the EL_VDD, EL_VSS, and VSP voltages are not being output from the TPS65651 chip.
How do I troubleshoot MX8_DSI_OLED1 display?

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