Chosen Solution
Good day, i have an Asus K42F laptop. When i plug it in charging LED indicator lits but when i start it up the power and caps lock LEDs blink once and shuts down immediately together with charging LED indicator and the charging LED indicator turns on again. Already tried hard resetting it by disconnecting the battery and the charger and pressing the power button for couple of minutes. I tried different charger and also tried replacing the RAM. What could be the possible problem? Thanks and more power guys!
Hi @ricknel023 , Try a full power refresh and see if that resolves the problem. Looking at this teardown video of the laptop, it appears that it has a coin cell CMOS battery on a board. Try removing the main battery and the coin cell battery, then pressing the power button for 30 seconds. Reinsert the coin cell battery, then reassemble the laptop, reinsert the main battery and connect and switch on the charger and check if the laptop starts normally. Remember the orientation of the battery before removing it from the battery holder, usually it is+ve on top for when reinserting it or a replacement battery. Here’s an image from the video showing what I think is the coin cell battery
(click on image to enlarge for better viewing) Note : When you have removed the coin cell battery, check its’ voltage. If it is <2.6V DC replace it. Usually these batteries are a 3V non rechargeable CR2032 Lithium battery (battery type is stamped on the battery) and are available mostly everywhere. They have a lifespan of 4-5 years. Once they get low sometimes the BIOS can become corrupted due to any power fluctuations which prevents a normal start. Also there may be a message on startup about the date and time being incorrect. This is normal as the BIOS has been reset. Once the date and time have been corrected the message won’t appear the next time that the laptop is started.
