Screen Freezes, Fan Goes to High, Crashes, but Isn't Overheating

[Jimmy_92]

I have a Lenovo Y400. Windows 10. Intel i7-3630QM CPU, 8GB RAM
Please let me know if you need further information about my laptop.

Essentially what happens is if I set the laptop down on any soft surface, or pick it up by it's fan side (left), the fan will speed up, screen will freeze, and after 2-3 seconds will lose all power.

I have taken it in to a local repair shop, and they were unable to identify the problem. It should be noted that I cannot recreate the shutdown at will. It happens about 50% of the time when the aforementioned scenarios take place.

I have kept track of the temperature of the laptop, and there is no indication that it is an overheating problem. I can play games all day that I know heats the laptop up significantly without issue. The laptop has never crashed when noticeably hot.

I have run disk checks that have all come back clean. The laptop is virus free to my knowledge, and runs perfectly otherwise. I am guessing some sort of physical connection is the issue, but I haven't been able to identify any noticeably loose wires.

In the Event Viewer, I can find no "culprit" that stands out as being the problem, although my computer science knowledge might be too limited to identify what might be the issue.

I realize it's a long shot to identify this issue over the interwebs, but I've had several "professionals" look at it, and they can't replicate the issue or figure out its cause. I thank you in advance for your kind responses.

 

[hang-the-9]

If this only happen when you move the system then it's a hardware issue, something is loose and/or causing a short. Did you contact Lenovo?

 

[Jimmy_92]

If this only happen when you move the system then it's a hardware issue, something is loose and/or causing a short. Did you contact Lenovo?

Lenovo had me take it to a local technician, who was unable to identify the problem. So that led me here. I'm open to suggestions.

 

[hang-the-9]

Try another tech see if they can find something. If it was my system, I'd reseat all the connections, including RAM, re-do the heatsink with new thermal paste. It may be an issue with just the right amount of heat and flex on the motherboard that is causing it to crash. It does happen, that is often how laptop motherboard break, over time the connections weaken or crack in a tiny way, and a motion or temperature change (which changes size of the hardware a bit) causes it to fail. Then it seems to work OK for days till you do the same thing again.