This is a difficult question. I have an ASUS K72J series laptop that is over 4 years old.
My laptop shuts off randomly in high power demanding games (no warning/no lag). It is NOT hardware or heat. It is NOT the power supply. That really only leaves software but I am at a wits end trying to figure out what/why/how. I have updated all drivers and DriectX. The computer works fine - hours on end - but as soon as I try to play a 'heavy' game it lasts about 5-10 minutes and then shuts off. (These three games have triggered it - Borderlands 2, League of Legends and Farming Simulator 2).
This issue bagan about 1 month ago after I recieved my laptop back from a proffessional computer repairer, as I had my display cable replaced (this was a separate visit from the one where I had the thermal-paste re-done). I will stress that it had never happened prior to recieving my laptop back. However I don't know how that could be the cause - it was pointed out to me by a friend that It could have something to do with full-screen games and an issue with them that closes it, I haven't tested that yet by playing them in Windowed mode.
Here is some further explanation:
Power Supply: I have run Borderlands 2 on battery power only, AC power only and on AC + Battery power. Same shut down problem happened everytime.
Heat Issue: I know it is not heat as I had the heat-sinks and thermal-paste re-done. Also the computer place I took it too ran a stress test and had temps up around 90C (and it didn't shut down) and my laptop gets nowhere near that in-game (I ran some software and monitored the motherboard, graphics card etc they never went above 65C before the laptop turned off - whilst playing a game). The computer place also had a look at the fan system thoughout my laptop and said it was/is working fine.
Updates: As I said I have updated all drivers and DriectX and I always keep the windows updates up-to-date. I have looked at event logs and cannot find and 'critical' issues reported (or any issues for that matter) that describe the problem or match up with the time of each shut down. (however I do not use these much so may miss something or not be looking for the right things).
Thanks for any ideas/help
Edited by Rinkashime, 25 August 2014 - 11:39 PM.