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SK-TDA4VM: TI board is not booting now.

JOORAK KANG
Prodigy 20 points
Part Number: SK-TDA4VM
Other Parts Discussed in Thread: TDA4VM

Tool/software:

TDA4VM (purched in November last year) is not booting now.

Please help me how to fix it.

I checked the following:
· Changed the power adapter
· Checked the power supply till reset button via multi-meter. voltage is coming proper till reset button.
· Changed the SD card (OS image) which is working in other TI board. But not booting
· Checked with UART log (No logs: this mean no boot loader i.e. it isn’t OS problem)
· Checked that the boot mode switch was set properly compared to a normally operating board

  • 0
    TI__Mastermind 38670 points

    Hi,

    Can you confirm that you cannot see any logs even on the WKUP_UART.

    Regards,
    Tanmay

  • 0 in reply to Tanmay Patil
    Prodigy 20 points

    How to check any logs on the WKUP_UART?

    If possible, please mention the steps to check WKUP_UART.

  • 0 in reply to JOORAK KANG
    TI__Mastermind 38670 points

    Hi,

    Over J4, can you check if you see any thing on either COM 1 or COM 2 ports.

    Regards,
    Tanmay

  • 0 in reply to Tanmay Patil
    Prodigy 20 points

    There are no logs on the WKUP_UART.

  • 0
    Prodigy 20 points

    Please update this thread with technical solutions and let me know what your AS policy is for this board issue.

  • 0 in reply to JOORAK KANG
    TI__Guru**** 162670 points

    Hello, 

    As told in the new thread, we prefer to continue here. I have looped in our board experts. We will get back to you in a day.

    Best Regards,

    Keerthy 

  • 0 in reply to Keerthy J
    TI__Guru 51785 points

    Do you have any other boards/peripherals connected via USB, PCIe, Expansion headers, etc? 

    There should be a label on the board - PROC112??? - what does label show (this is version info)

    What is dip switch setting?  (Please toggle each individual dip switch to ensure properly set).

    With power supply connected/powered - can you use voltmeter to measure voltages at following locations?  (GND is TP1, TP3, TP53, TP58)

    TP12

    TP37

    TP51

    TP55

    TP56

    Please use PROC112_ASSY PDF file to help with test point locations.

  • 0 in reply to Robert Eschler
    Prodigy 20 points

    1. It was not connected to other boards or peripherals.

    2. PROC112B(001)

    3. SW1.1/2/3/4 all off - Same setting as other proper operation board.

    4. I don't have PROC112_ASSY PDF file. I couldn't measure because I didn't know the TP locations.

       However, there seems to be a problem with the power management block of the board as there is no change in the temperature of the heat sink even after tens of minutes of power supply.

    Please let me know if you have AS policy for HW failure.

  • 0 in reply to JOORAK KANG
    TI__Guru 51785 points

    The assembly file is included in the design package. I've included here for you to review test point locations.  What is the history of the board?  It was working from Nov until start of this thread?  How has the board been used (what applications, environment, etc)?

    PROC112B_ASSY.pdf

  • 0 in reply to Robert Eschler
    Prodigy 20 points

    1. TP measurement result

    TP12 0V / TP37 0V / TP51 3.3V / TP55 3.3V / TP56 20V

    2. We are only testing a simple segmentation deep learning model.

       Yes. It was working well from Nov until start of this thread. Other TDA4VM boards are still working well.

  • 0 in reply to JOORAK KANG
    TI__Guru 51785 points

    The first stage regulator is on and the signal going to 2nd stage power supply (PMIC) is enabled.  However - appears 2nd stage power (PMIC) is not turning on.  The PMIC has functional safety mechanisms that if it detects an error (over-current, residual voltage, etc) it will shut down in effort to protect circuitry.  That is likely the issue. 

    If the board is not booting after a power cycle (removing input power and re-inserting) - then likely the board was damaged in some what (ESD, Thermal stress, etc).  TI does not have any warranty policy on the EVMs.  You will need to replace the board.

    If the board is booting, but after some time shuts down - then PMIC could be detecting an over-current condition.  This could be thermally related or possibly a PMIC setting adjustment.