Asus Laptop Model U56E shutting off at random and during boot up?

"Sounds like you're hitting a thermal issue here. While the case may not feel warm the CPU or GPU may be shutting down due to heat.

A common issue here is dust buildup in the fans and heat sink fins (also don't block the vents). Also given the age of the system you may want to remove (carefully) the heat sink and apply a fresh coat of thermal paste. It's a bit of work as you do need to clean the old stuff off first and make sure you don't damage anything in the process.

To help in diagnosing your issue you can try CoreTemp which allows you to see the thermal sensors on the CPU."

I just bought my Asus X441U about two weeks ago and I am experiencing the same problem. It randomly turns off for no reason, and it won't boot unless the charger is plugged in even though the battery is fully charged. By the way, it makes a sound when it turns off, the sound my HP laptop makes when it's overheating. I haven't tried any solution yet and I plan to take it back where I bought it. Just want to share that the problem is still present on Asus Laptops even after 3 years since this post was made.

I have the same laptop, bought it in January 2012. I've just recently on two different occasions have had it shut down for no apparent reason. Both times I had it running on battery only, it hasn't done it to me when it is plugged in. The thing is, on both occasions it shut down without warning, once I plugged it back in it said there was 50+% battery power remaining. I'm sitting here now ready to buy a new battery but I'm not really sure if that will fix the problem. Did you have any resolve?

Sounds like the same issue I have with mine bought in early 2012. after a year and half I had the hard drive and mother board/graphics card replaced and still have the problem. Though it seems much more random now... some days shuts off every few minutes some days not at all. No pattern to process either some times just running word documents and sometimes streaming video and other times no problems at all. About to upgrade now putting up with the issue this long hoping it would die to help me reason replacing it considering the amount of money I spent having custom graphics put on the lid. When I replace it I wont be buying another ASUS and I won't be buying from the same store.

"Hi, I seem to have a similar problem with my Asus laptop X53e bought in 2011. For already more than a year my laptop has been showing similar symptoms of shutting down all by itself and/or not starting up if I push the start-up button. In fact, that's where it started: not being able to start the laptop. That initially occured when I had the laptop in a cool place like in our attic during the winter without heating. Gradually the spontaneous shutting down started to occur. At first the problems occured mainly in the colder seasons but now it happens all the time, whether in summer or in winter time. But I still have the feeling there is a relation with temperature drops, it seems to occur more often in the cooler hours of early morning or evening. But it can also unexpectedly shut down just in the middle of the day.

And always, once shut down, it will retry to switch on again all by itself, trying various attempts before succeding.

There is no relation with whether it's on power supply or on battery.

I changed my HDD to a SSD, that makes no difference at all. I really think it must be a hardware problem but I don't know where to look for a solution. Any suggestions?"

I took the top panel off the system and blew away lots of dust and debris. No more automatic rebooting. I'd also taken out the optical drive and the HD. Blew lots of junk out of there. The system was four years old when this problem began. It wasn't the bios either (I've the more recent).