I Have an Asus K45VD with a mother board LA-8224P.
After some time it suddenly shuts down, no questions asked.
It boots prefectly.
Works fine for a few hours.
Then black screen, and I have to turn it on normally.
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Hi,
What OS is installed, Win7, 8.1, 10?
Check in Event Viewer to see if there are any critical/error/warning events listed at the time of shutdown that may give a clue as to what is happening.
It may also be a simple heat problem with the hardware.
Check that the laptop's fan vent is clear and unobstructed.
It may be that the fan needs to be cleaned and the CPU may need to have fresh thermal paste applied.
Here's a link to a video that shows how to disassemble your laptop to gain access to the fan so that it can be cleaned.
Here's a link to the ifixit Asus Laptop K43SA A43SA Thermal compound Replacement guide. I realize that it is not your model but it shows how to clean the fan and remove/apply new thermal paste to the CPU which may be of some help, once you have access to your fan and CPU.
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It may be built to shut down to prevent over heating. If it is a safety thing or if it's getting to hot, you can buy a cooling pad, if it's a laptop. It's also possible that a recent app you installed may be causing it to crash. You may also need to just simply download and install updates
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