Hp probook 4440s no power

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • razu
    Badcaps Veteran
    • Jan 2015
    • 218
    • Bangladesh

    #1

    Hp probook 4440s no power

    Hy all tech friend, I checked hp probook, its have 3/5volt, switch have 3.3 volt, but no power. rtcrst have 3.3 volt, I reflashed bios. but its cannot power on, what can I do now, which signal I check for ??????
  • Techtiger
    Badcaps Legend
    • Oct 2014
    • 1601
    • france

    #2
    Re: Hp probook 4440s no power

    Check RSMRST high / low
    EC RST
    Power Button high / low
    Test BIOS 3.3V

    Comment

    • razu
      Badcaps Veteran
      • Jan 2015
      • 218
      • Bangladesh

      #3
      Re: Hp probook 4440s no power

      I found ec reset 3.3 volt, rsmrst 3.3 volt, bios have 3.3 but I found its physical damage, a registor is bad. Can any one have its board viewer, I found schematic........ if ec rst is missing sio is bad?????

      Comment

      • mcplslg123
        Badcaps Legend
        • Jun 2015
        • 7262
        • india

        #4
        Re: Hp probook 4440s no power

        If the resistor is near sio and connected to it, then just trace the pin number of sio. Rest you can follow the schematic to find out its value.

        Comment

        • razu
          Badcaps Veteran
          • Jan 2015
          • 218
          • Bangladesh

          #5
          Re: Hp probook 4440s no power

          its not sio registor , its under the pch chips. I need board viewer...

          Comment

          Related Topics

          Collapse

          • GLISIT
            Asus Probook P5440UF-XB74 power issue
            by GLISIT
            Hi all,

            TL;DR - this laptop is driving me nuts with the oddball power-related behaviors. Appreciate any insight you can provide!


            I'm experiencing a power issue on an Asus Probook P5440UF-XB74. Although I've worked with electronics and computers for decades, this is my first attempt at getting into motherboard-level component troubleshooting. Any help the community can provide is greatly appreciated!

            A few weeks ago I was using the laptop (on battery power) for a Zoom meeting. The battery was running very low (long meeting) but I wasn't worried about...
            01-16-2025, 02:29 PM
          • sam_sam_sam
            Desoldering gun station modified to use a 18 volt @ 20 amp switching power supply
            by sam_sam_sam
            I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump

            One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy...
            03-31-2024, 02:12 PM
          • Tynan Dill
            Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?
            by Tynan Dill
            I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.

            Upon bringing it home and plugging it up, it showed a standby light.

            I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.

            The screen seems to blackout and stay black, but with a flashlight I can see the display.

            With my Playstation 4 connected via HDMI, and running a game I can hear sound.

            Assuming...
            11-22-2024, 01:46 PM
          • Document Archive
            HP ProBook 430 G6 + 20000mAh Blupeak USB-C Laptop Power Bank + Blupeak USB-C Magnetic Adapter Notebook 400 Specification for Upgrade or Repair
            by Document Archive
            This specification for the HP ProBook 430 G6 + 20000mAh Blupeak USB-C Laptop Power Bank + Blupeak USB-C Magnetic Adapter Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 430 G6 + 20000mAh Blupeak USB-C Laptop Power Bank + Blupeak USB-C Magnetic Adapter boardview and 430 G6 + 20000mAh Blupeak USB-C Laptop Power Bank + Blupeak USB-C Magnetic Adapter schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional...
            09-06-2024, 12:00 PM
          • Document Archive
            HP ProBook 450 G6 + USB-C Essential Power Bank Notebook 400 Specification for Upgrade or Repair
            by Document Archive
            This specification for the HP ProBook 450 G6 + USB-C Essential Power Bank Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 450 G6 + USB-C Essential Power Bank boardview and 450 G6 + USB-C Essential Power Bank schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we...
            09-06-2024, 11:05 AM
          • Loading...
          • No more items.
          Working...