How to Fix the 1 White and 3 Amber Flashes Error on Dell Laptops Reseat or Replace the CMOS Battery: If comfortable, open the laptop and locate the CMOS battery Reseat the battery or replace it with a new one Refer to the laptop's manual for specific instructions Check Memory Modules: Ensure memory modules are properly seated If possible, reseat or replace the memory modules
How to Replace a Coin-Cell Battery on Your Dell Laptop For information about how to remove and then replace the CMOS (coin-cell) battery in your Dell laptop, see the documentation for your computer, and then search for CMOS battery or coin-cell battery, and follow the instructions
PowerEdge: How to Replace a CMOS Battery - Dell To replace a CMOS battery, remove the air shroud, disconnect and remove any expansion cards, locate the battery socket, and carefully pry out the CMOS battery After installing a new CMOS battery, you must reinstall the expansion cards, install the air shroud, and restore the BIOS settings, ensuring the battery is operating properly and the correct data and time are set in the System Setup
How to Reset the Real-Time Clock (RTC) to Recover Your Dell Desktop . . . What's the difference between this and removing the CMOS battery? The power button reset does the same thing as removing the battery or moving the jumper, but it's easier and doesn't require opening your computer My computer is connected to a UPS or surge protector Is that okay? For best results, plug directly into a wall outlet during the reset
PowerEdge: CMOS Battery Customer Replaceable and Basic Warranty . . . CMOS Battery replacements for Basic Warranty contracts are under warranty through Dell for up to 1 year This article outlines how to order and replace CMOS batteries once these batteries are no longer under warranty and replaced by Dell