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  • What.....Was That?

    Ok, short back story: I've been debating upgrading the ram on my laptop, so Mombot and I were going to go ahead and do it today. She's done the same process five times in the past and nothing has gone wrong with any of the computers she's worked on.

    So I power down the computer, a Dell Latitude D620, disconnect everything and we get ready to start. She takes out the battery pack, presses the power button twice to ground any leftover power, and gets ready to take the back off of the compartment that has my RAM cards in it but she can see she's going to need more than the 1 512 mb stick she has, as the 1 gb of RAM I have is comprised of 2 512 mb sticks. She can see this through the slats without having to take the back off, so we decide not to go ahead with the procedure, put the battery back in, and I reconnect the power cord and everything like I had it before and boot up.

    Except right after I see the Dell boot up screen, I don't even get to the boot up for Windows. Instead, it spends the next few hours running a diagnostic test on the whole machine - the screen, the keyboard, the mike, the mouse, everything. This started at about 12:00 today, and it just finished a few minutes ago.

    Booted up Windows as normal, all my stuff is still on my drive, everything is as I left it. The only thing I had to fix was date and time (it decided that right now was 3:06 AM on April 11th, 2006 - the day it was built before sending it out to me to go to college with).

    I guess what I'm asking is what happened? Why did it do that? I've tried running a generic search on changing the battery, but all I got were how-tos and nothing about diagnostic checks. And if it helps, the last time I actually changed the battery was two years ago, and it was a dead battery. But after I had charged the new one and booted up, the laptop didn't do this diagnostic test thing.

  • #2
    Sounds like your CMOS battery is dead. That'd be the thing that keeps all your date/time settings, BIOS settings, stuff like that, saved when your system's powered down.
    Ba'al: I'm a god. Gods are all-knowing.

    http://unrelatedcaptions.com/45147

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    • #3
      Probably wouldn't surprise me, this computer's going on 4 years old now.

      Could it have also been tripped when we took the battery pack out of the laptop?

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      • #4
        Unlikely. Batteries are designed to be removed from laptops, so that over the life of it, you can replace it, or swap it for an extended life battery. It'd have no bearing on the CMOS battery, except for keeping everything running after that one dies.
        Ba'al: I'm a god. Gods are all-knowing.

        http://unrelatedcaptions.com/45147

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        • #5
          Could it have also been tripped when we took the battery pack out of the laptop?
          No, but it was likely running off the residual charge in the main battery since the CMOS battery was dead, once you pulled power and the main battery there was nothing left. Seen similar behaviour with the PMU battery on a Mac (essentially the same thing as a CMOS battery with a different acronym).

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          • #6
            Okay, so I booted up this morning and I didn't see the same diagnostic test it pulled off yesterday, it just booted up as normal and logged me into Windows. The date and time are also still correct.

            So my mind's still boggled.

            I've been researching the CMOS battery for my laptop model, and it's not the easy to take off button-cell looking battery I've spotted. It's more of a wired cell battery that hooks up somewhere in the motherboard. This is not going to be an easy operation.

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            • #7
              Quoth Nashida View Post
              I've been researching the CMOS battery for my laptop model, and it's not the easy to take off button-cell looking battery I've spotted. It's more of a wired cell battery that hooks up somewhere in the motherboard. This is not going to be an easy operation.
              It's also something you don't need to bother doing unless you plan on removing that other battery on a regular basis.
              Ba'al: I'm a god. Gods are all-knowing.

              http://unrelatedcaptions.com/45147

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              • #8
                No, I don't plan on removing that battery pack again for quite some time. I might do it when I decide to upgrade my RAM, since that's what I've done in the past when upgrading RAM. The only other time it would be removed is if it finally kicks the bucket for good, and I can't run the laptop on its battery at all.

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