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DELL LATITUDE E6440 Not Booting: Post-BIOS Procedure Failure and Power Button Unresponsiveness

Raphy77 10845 9
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  • #1 16452172
    Raphy77
    Level 14  
    Hello all,
    The laptop worked without restrictions until it stopped undergoing the procedure of post-bios, after turning on the DVD drive and hard disk were heard, no content displayed on the screen. By itself, it stopped responding to the power button, except for the diode that turns on for a few seconds after pressing the power button.
    Unfortunately, I do not have access to a functional CPU system so far to check and confirm any damage to the CPU system

    The board is: VAL90 LA-9931P (2013-09-11)
    CPU is: SR1HA

    Measured voltages relative to mass:
    Button voltage - 3.10V
    Voltage on BIOS and EC bones - none
    PL5 - 19.40V, PQ4 - 19.44V, PQ700 - 19.44V, PL701 - 19.40V, PL700 - 13.53V, PR716 - 13.52V, PL301 - none, PL201 - none, PL101 - 3.33V, PL102 - 5.05V, PL503 - none, PL502 - none

    Pictures of the disc below

    DELL LATITUDE E6440 Not Booting: Post-BIOS Procedure Failure and Power Button Unresponsiveness

    DELL LATITUDE E6440 Not Booting: Post-BIOS Procedure Failure and Power Button Unresponsiveness
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  • #2 16452295
    sk1977

    IT specialist  
    What current does the board consume?
    Have you measured the voltages on the converter coils?
    If the above does not guide you - to reprogram the BIOS.
    Helpful post? Buy me a coffee.
  • #3 16452412
    Raphy77
    Level 14  
    sk1977 wrote:
    What current does the board consume?
    Have you measured the voltages on the converter coils?
    If the above does not guide you - to reprogram the BIOS.


    this is how I measured the voltages on the coils - described above, I do not have a schematic of this board, so the description from the board
    the current is 19.5V, 0.001A, i.e. it does not charge at all
    BIOS and EC reprogrammed
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  • #5 16453110
    Raphy77
    Level 14  
    sk1977 wrote:
    I think you have KB9012 on this CD - if so, it still needs to be reprogrammed.


    ... this board is different, there are two layouts on this board:

    SMSC ECE5048-LZY - Advanced I / O BC-Link

    SMSC MEC5075-LZY

    and as far as I know they are not programmable
  • #6 16453382
    lisek
    Service technician RTV  
    Check out this SM from Dell Latitude E7440 Link
    motherboard: VAUAO LA-9591P, Rev: 1.0 (A00)
    * 2013-09-11

    cpu: i5-4300U (SR1ED)
    kbc: SMSC MEC5075-LZY + SMSC ECE5048-LZY
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  • #7 16453400
    boro1234567
    IT specialist  
    Raphy77 wrote:

    SMSC MEC5075-LZY
    and as far as I know they are not programmable

    MEC5075 requires programming.
  • #9 16456177
    Raphy77
    Level 14  
    boro1234567 wrote:
    Raphy77 wrote:

    SMSC MEC5075-LZY
    and as far as I know they are not programmable

    MEC5075 requires programming.


    Thanks for the hint, this is how I got acquainted with this layout. Programming NCBs for circuits is still something fresh for me, which I have not dealt with before except a bit of theory found on the Internet, and the reliability of this knowledge varies. If I can get advice from you as specialists in this field, please share some specific and accessible source of knowledge about KBC programming methods, techniques and devices (such affordable because I found on the internet programming devices for the above systems, which cost over 500 euro, I'm looking for something cheaper for a good start)
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  • #10 16457826
    lisek
    Service technician RTV  
    Jeden z prostszych Link_ 45.$
    - bywał w sprzedaży na polskim "alledrogo"
    Lub TL866CS USB Universal Flash EEPROM Programmer Link

    Lub
    Vertyanov JIG programmer VER 3 /* ok.100.$ z dostawą (Odessa UA)
    * zsyłka na ebay pokazuje możliwości tego programatora
    Quote:
    The new version Vertyanov JIG V3 is able to:
    1 Program EC NPCE288N / NPCE388N via the keyboard connector or an external adapter.
    2 Program EC KB9010 / 9012/9016/9022
    3 Program EEPROM LCD panels (EDID display).
    4 Program EC IT8585 / 8586/8587/8985/8987. Other EC ITE simply not been tested.
    5 Program EC MEC1609/MEC1633L
    6 Extras can check in an autonomous mode, the keyboard laptop sockets with a pitch of 1 mm / 05mm / 08mm.
    (Audible alarm keystrokes and errors (buzzer).)
    7 Keyboards can be checked through the shell on the PC.

    Two ways of programming the memory EC NUVOTON (NPCE288N / NPCE388N) - directly on the MB laptop via the keyboard connector or on the external adapter.
    Reading Time Loop 70 seconds. Time erase + write about 20 sec.
    Firmware ITE EC (IT8585E, IT8586E etc.) is through the keyboard connector without soldering.
    Recording - from 100 to 200 seconds. Reading to 20 sec. Increased speed in comparison with the previous version.
    Firmware EC ENE (KB9010 / 9012/9016/9022) is through the keyboard connector without soldering - now automatically!
    Reading about 10 seconds. Recording with verification of no more than 20 seconds.
    You must have two cable USB B - square as printers, scanners, etc ..
    One cable for connecting to the PC, and the other to connect the ground programmer and laptop motherboard.
    Shell works on all OS Windows XP / 7/8 / 8.1 / 10-bit word length 32/64.
    We do not have any activations. Buy a programmer and upload freely available all the necessary software.
    Free support on certain forums.


    MEC5035/5045/5055/5075 =192KB + 2KB
    DELL LATITUDE E6440 Not Booting: Post-BIOS Procedure Failure and Power Button Unresponsiveness

    DELL LATITUDE E6440 Not Booting: Post-BIOS Procedure Failure and Power Button Unresponsiveness
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Topic summary

The Dell Latitude E6440 is experiencing a failure to boot, characterized by a non-responsive power button and no display after the BIOS stage. The user has measured various voltages on the motherboard (VAL90 LA-9931P) and noted that the current draw is minimal (19.5V, 0.001A), indicating a lack of charging. Suggestions from the forum include checking the current consumption, measuring voltages on converter coils, and reprogramming the BIOS and embedded controller (EC). The discussion also highlights the need for programming the KBC (Keyboard Controller) components, specifically the SMSC MEC5075, which is not programmable in some layouts. Users provided links to programming devices and resources for KBC programming techniques, emphasizing the need for affordable options for beginners.
Summary generated by the language model.
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