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If the Date & Time changes back to some previous date when you next boot up the computer then the CMOS battery is worn out and needs to be replaced. After replacing the CMOS battery go into the BIOS and set the Date 7 Time.
Dear john, replacing CMOS Battery usually RESET password ( plug out your laptop battery,then plug out the CMOS battery. keep it out for 5 minutes.) After 5 minutes by, put back on the CMOS battery. put it back all together. laptop battery the last one. On the first boot you need to set the time and date. or by pass it by pressing ESC. >> If your Operating System goes >>> right click on clock task bar >>Adjust Date/Time >> set as you wish >> apply >> ok >>>RESTART your unit.
There are two possibilities. The first possibility is that the CMOS battery has died (sometimes happens even on newer machines). These batteries don't cost that much, but sometimes these batteries aren't the easiest to get to. If the computer is under warranty, you may want to have Dell replace the battery.
You can find the service manual here if you want to replace the CMOS battery yourself:
http://support.ap.dell.com/support/edocs/systems/vos1014/en/index.htm
This service manual refers to this battery as the "coin cell battery."
Step by step instructions are here:
http://support.ap.dell.com/support/edocs/systems/vos1014/en/SM/AD_Coin_Cell.htm
The second possibility is that a motherboard component has gone bad and (the motherboard) needs replacing. One would certainly hope that the laptop is under warranty for this.
Date & Time are kept by RTC (Real Time Clock) CMOS Battery, which is usually a coin-cell battery on the motherboad. As the RTC of your system is dead, it can not keep time. Therefore, RTC (CMOS Battery) is required to be replaced with a new one to fix the issue. Refer here for more information/ disassembly guide.
Let me know if any further clarification is required. Hope this helps! Dont forget to rate the solution!! CreativeTECH
This could mean two things: a problem with the cmos battery or the motherboard itself. Try to remove the cmos battery first and install. If not,then replace the cmos battery.
Hi,
This is one of the known issues with the Inspiron 1525 computer.The problem is caused by faulty cmos battery. If you computer is in warranty kinldy call Dell to get the same replaced . if the system is out of warranty. You would need to replace the CMOS battery ie below the keyboard.
You can follow the instructions below
for instructions on how to remove and replace the coin-cell CMOS battery. Replacement Battery is standard 3V coin cell battery (found at dollar stores, hardware stores etc.)
The CMOS battery keeps the laptop configuration stored in the CMOS chip and the main battery has no effect on the CMOS.
If the date and time drift off, it indicates the CMOS battery is nearly flat and needs to be replaced.
If you had ticked the Daylight saving box in the Time Zone tab in Control Panel - Date and Time setting then the time would automatically adjust for Daylight saving.
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