Netgate Discussion Forum
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Search
    • Register
    • Login

    Motherborad loosing BIOS settings - battery is fresh

    Scheduled Pinned Locked Moved General pfSense Questions
    4 Posts 2 Posters 1.1k Views
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • 2
      2chemlud Banned
      last edited by

      Hi again!

      I'm running pfsense ( ;-) ) on an Openvox IPC110, working fine. But the CMOS battery was empty, replaced it (soldering out/in), fine. With some of these boards. But 2 of them loose the BIOS settings when powered off, even with a fresh battery.

      Has anybody ANY idea what is going on here? I don't know how to solve this….

      Kind regards

      chemlud

      1 Reply Last reply Reply Quote 0
      • D
        divsys
        last edited by

        You might want to check and see if the battery voltage is getting to appropriate pin on the RTC chip.

        I've seen cases where someone used the "ClearCMOS" jumber on a MB when the board was powered up and blew some protection circuitry, effectively disconnecting the battery from the chip - permanently.

        -jfp

        1 Reply Last reply Reply Quote 0
        • 2
          2chemlud Banned
          last edited by

          Hi and thanks!

          Any advice how to identify the RTC chip? Multimeter is onboard, so this is no problem… :-)

          kind regards

          chemlud

          1 Reply Last reply Reply Quote 0
          • D
            divsys
            last edited by

            Could be a bit of a head scratcher, I'd look for a likely 104(?) pin IC not too far from the battery either on the top or bottom of the board.
            Google is your friend if you can read the IC markings

            You might get a little more info with the DMI-Decode package to give you a view from the OS POV.

            And perhaps check to make sure the ClearCMOS jumper isn't on (or the pins shorted)  ;)

            -jfp

            1 Reply Last reply Reply Quote 0
            • First post
              Last post
            Copyright 2025 Rubicon Communications LLC (Netgate). All rights reserved.