Recently a friend’s laptop stopped working. The screen would go black and display only the message; “Time-of-day clock stopped”. The error occurred before the start-up sequence reached the boot options. After some research I discovered that it’s actually a common problem for the Dell Inspiron. I also learned that a little coin cell battery needs to be replaced on the system board in order to fix the problem.

It took me about an hour to take the laptop apart to get to the battery and another hour to put everything back together again. Fortunately, I didn’t mess anything up. Afterward, the laptop started up nicely and asked me to enter the BIOS setup to reset the system’s clock. After I did that, Windows started up normally and as far as I know, everything works perfectly.

Without the step-by-step service documentation provided by Dell, I probably wouldn’t have gotten it done.

Here are a bunch of pictures that I took, documenting the process;

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The Error Message
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Start on the underside
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Remove Battery, Optical Drive, and Hard Drive
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Remove the Center Control Cover
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Remove the Keyboard
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Remove the Base Cover and the Processor Heat Sink (Red Arrows)
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After Removing the Display Assembly
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After Removing the Palm Rest
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Removing the Daughter Board
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The Removed System Board
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What’s Left of the Laptop
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The Battery is on the Underside of the System Board




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Posted in Other StuffTagged cmos battery, dell inspiron 1545, laptop repair

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David Morton says:


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kabtish says:

I have to get the CMOS battery (clock battery) replaced on my dell inspiron 1545. I have a guy that is going to fix it however rather than bringing him the computer, having him take it out and then bringing it to a battery store, i’d rather get the battery first and then bring him both the laptop and battery. But I have no clue what kind of CMOS battery it is.. are they all the same? one size fits all? I honestly have no clue.. ive been googling for hours and cant find anything! Please help!