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 Post subject: Defective motherboard?
 Post Posted: Sun Dec 13, 2015 10:14 am 
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Joined: Sat May 08, 2010 4:13 pm
Posts: 956
I received this laptop in the mail last night. If the item is plugged into an electrical outlet right after being unplugged and I turn the computer on, the following message would appear:

    CMOS Settings Wrong
    CMOS Date/Time Not Set
    Press F2 to run Setup

Scott, could this be a sign of a defective motherboard? I would apparently have to have the laptop constantly plugged into an electrical outlet in order for the above message to not appear every time I turn on the computer. I currently have two other laptops, and a similar message doesn't pop up every time I plug in one of them to an electrical outlet right after an unplugged period and turn the puppy on.


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 Post subject: Re: Defective motherboard?
 Post Posted: Sun Dec 13, 2015 10:21 am 
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Location: Phoenix, AZ, USA
replace the MB battery ... nice link BTW


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 Post subject: Re: Defective motherboard?
 Post Posted: Sun Dec 13, 2015 1:38 pm 
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FascistNation wrote:
replace the MB battery


You mean the CMOS battery?


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 Post subject: Re: Defective motherboard?
 Post Posted: Mon Dec 14, 2015 12:28 am 
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Joined: Sun Feb 04, 2007 11:44 am
Posts: 5787
It could also be a defective main battery. The battery in a laptop that old would normally be dead (or nearly so) and the CMOS battery would most likely be dead as well. What happens when you replace the CMOS battery and run the system without the main battery installed? Scott.


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 Post subject: Re: Defective motherboard?
 Post Posted: Wed Jan 20, 2016 1:01 pm 
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Scott, I've located the CMOS battery in the Averatec 4200 Series laptop that I have.

Attachment:
File comment: Location of CMOS battery in Averatec 4200 Series laptop.
CameraZOOM-20160120101532522[1].jpg
CameraZOOM-20160120101532522[1].jpg [ 108.22 KiB | Viewed 2013 times ]


Is there a particularly good way to get it out? How do I put in a replacement?


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 Post subject: Re: Defective motherboard?
 Post Posted: Wed Jan 20, 2016 1:45 pm 
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You just unplug it and plug in a replacement. You can purchase a direct replacement for a few bucks or replace the battery in the existing unit using a new coin cell, conductive tape and heat shrink tubing. Scott.


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 Post subject: Re: Defective motherboard?
 Post Posted: Wed Jan 20, 2016 2:10 pm 
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Scott, I have stuff to replace the current battery with. My big concern is that the current battery is not in a socket. It appears to be held in place by an adhesive.


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 Post subject: Re: Defective motherboard?
 Post Posted: Wed Jan 20, 2016 3:58 pm 
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The cable connecting the battery to the motherboard is plugged into a socket. You will of course need to unplug it before you can plug in the replacement.

Image

Note that different 2-pin connectors may be used by different models so you will want to insure that your replacement battery has the same connector as the existing one. If not you can splice the existing cable and connector to the cable on the replacement or attach a new bare battery to your existing cable using the method shown in the last link in my previous post. Scott.


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 Post subject: Re: Defective motherboard?
 Post Posted: Wed Jan 20, 2016 4:32 pm 
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I have tried but failed to remove the cable from its socket. Would using tweezers be a good idea?


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 Post subject: Re: Defective motherboard?
 Post Posted: Wed Jan 20, 2016 5:47 pm 
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The connector is a self-latching friction fit type, similar to that used for cooling fans. Normally you just grab the wires and pull. A tweezers used improperly could cause damage to the cable, connector or possibly even the motherboard. Scott.


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