The Notebook Review forums were hosted by TechTarget, who shut down them down on January 31, 2022. This static read-only archive was pulled by NBR forum users between January 20 and January 31, 2022, in an effort to make sure that the valuable technical information that had been posted on the forums is preserved. For current discussions, many NBR forum users moved over to NotebookTalk.net after the shutdown.
Problems? See this thread at archive.org.

    Clevo P751ZM doesn't want to power-up unless BIOS battery isn't pulled out and inserted again.

    Discussion in 'Sager and Clevo' started by poprostujakub, Sep 18, 2018.

  1. poprostujakub

    poprostujakub Notebook Consultant

    Reputations:
    42
    Messages:
    191
    Likes Received:
    95
    Trophy Points:
    41
    I have P751ZM with strange problem. The problem appeared after its 970M dies. I replaced it with 870M from MSI GT70 - I can turn on laptop, log in to Windows, GPU is even recognised by the BIOS. But everytime after I turn it off, I can't turn it on by simply pushing power button. I need to disconnect BIOS battery and connect it again, (but I don't need to reconnect main battery). After that, laptop turns on immediately after PSU cable is connected (even without touching the power button).
    I changed BIOS and both EC and EC2 to original ones (previously laptop had Prema Mod v2), but this doesn't change anything.

    Can it be a hardware failure?
     
    poprostujakub, Sep 18, 2018
    #1
  2. Prostar Computer

    Prostar Computer Company Representative

    Reputations:
    1,257
    Messages:
    7,426
    Likes Received:
    1,016
    Trophy Points:
    331
    Might be a problem with the power button circuit board, or its cable that bridges it to the main board. So the GTX 870M from the MSI works fine?
     
    Prostar Computer, Sep 18, 2018
    #2
  3. poprostujakub

    poprostujakub Notebook Consultant

    Reputations:
    42
    Messages:
    191
    Likes Received:
    95
    Trophy Points:
    41
    Yes, it can be a cause of this weird behavior.

    I will mod the driver tomorrow, but if 765M and 880M from Dell worked fine (but unfortunately K5000M didn't) I didn't expect any problems with MSI 870M.
     
    poprostujakub, Sep 18, 2018
    #3
  4. Meaker@Sager

    Meaker@Sager Company Representative

    Reputations:
    9,436
    Messages:
    58,200
    Likes Received:
    17,912
    Trophy Points:
    931
    What about the vbios? Have you tried swapping that out?
     
    Meaker@Sager, Sep 18, 2018
    #4
  5. Prostar Computer

    Prostar Computer Company Representative

    Reputations:
    1,257
    Messages:
    7,426
    Likes Received:
    1,016
    Trophy Points:
    331
    That's surprising that the Dell cards worked at all. It's still worth checking out the vBIOS to rule out the card.
     
    Prostar Computer, Sep 18, 2018
    #5
  6. Meaker@Sager

    Meaker@Sager Company Representative

    Reputations:
    9,436
    Messages:
    58,200
    Likes Received:
    17,912
    Trophy Points:
    931
    It's hit and miss as with most MXM, some do work.
     
    Meaker@Sager, Sep 18, 2018
    #6
  7. poprostujakub

    poprostujakub Notebook Consultant

    Reputations:
    42
    Messages:
    191
    Likes Received:
    95
    Trophy Points:
    41
    880M in my friend's laptop works nearly two years without any problems...
    Other question - where I can find Clevo vBIOS for 870M 3GB?
     
    poprostujakub, Sep 19, 2018
    #7
  8. Meaker@Sager

    Meaker@Sager Company Representative

    Reputations:
    9,436
    Messages:
    58,200
    Likes Received:
    17,912
    Trophy Points:
    931
    Techpowerup might have one or look via Google. If that fails ask around here.
     
    Meaker@Sager, Sep 19, 2018
    #8
  9. poprostujakub

    poprostujakub Notebook Consultant

    Reputations:
    42
    Messages:
    191
    Likes Received:
    95
    Trophy Points:
    41
    As expected, GPU works fine: https://www.3dmark.com/3dm11/12928516
    So, I have to prepare for battle with soldering iron as a sword and schematics as a shield. I have some good beer in the fridge, so I'm ready to siege this stubborn issue!
     
    poprostujakub, Sep 19, 2018
    #9
  10. Meaker@Sager

    Meaker@Sager Company Representative

    Reputations:
    9,436
    Messages:
    58,200
    Likes Received:
    17,912
    Trophy Points:
    931
    Did you try a different vbios first?
     
    Meaker@Sager, Sep 19, 2018
    #10
  11. poprostujakub

    poprostujakub Notebook Consultant

    Reputations:
    42
    Messages:
    191
    Likes Received:
    95
    Trophy Points:
    41
    No, I don't think that this is a vBIOS related problem, because with Dell GTX 765M problem looks the same.
     
    poprostujakub, Sep 19, 2018
    #11
  12. Meaker@Sager

    Meaker@Sager Company Representative

    Reputations:
    9,436
    Messages:
    58,200
    Likes Received:
    17,912
    Trophy Points:
    931
    Good luck with it then. :)
     
    Meaker@Sager, Sep 21, 2018
    #12