Overheating Issue

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logostrom

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I have a Lenovo Z510 laptop running Windows 10. Intel i7 processor and an Intel 4600 graphics card.

I've scoured the internet for help with my problem, but haven't been able to find anything that quite matches what I have going on. Starting several months ago, my computer started randomly crashing, but only when it is plugged in. I troubleshooted everything I could think of (graphics driver, AC adapter, the battery, the port the AC adapter plugs into, etc.), and believe I've finally found it to be an overheating issue. This is because when the case is removed from my laptop, or if the laptop is placed on a vent blasting A/C my computer doesn't crash while plugged in. As soon as the case is put back on, or the computer is taken off the cool vent, my laptop crashes within minutes. I've replaced the fan and reapplied thermal paste with no success. The AC adapter does seem to have some effect on the crashes, but the AC adapter that never caused the computer to crash shorted out recently. I'm wondering if it's a mix of electrical issues causing overheating? Or maybe malware causing overheating? I'm not sure, but the computer rarely feels very hot when it crashes. Even if the computer has been off for hours, and is turned on while plugged in, it will usually crash within seconds, so I have a hard time believing it's solely an overheating issue. But the fact that cooling the computer over a vent prevents this makes me think it is part of the issue. Any ideas? Thanks for your help.
 
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Jun 23, 2016
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Overheating laptops, for me has been caused by plugged vents and poor thermal paste on the CPU. Proper cleaning with high alcohol and replacing the thermal paste, will require at least partial disassembly of the machine. Usually by removing the key-board and bezel. I suggest a Google search for best practices for your particular machine. Be very careful. Many super small wiring and connectors.

Go for speccy to read any high temps
 

logostrom

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Jul 7, 2016
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Yes, I have opened up the laptop and cleaned it thoroughly and replaced the fan and thermal paste and the problem persists.
 

Saturable

Mark
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May 2, 2016
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I'm not sure, but the computer rarely feels very hot when it crashes.
Warm air coming out of your vents is actually a good thing (contrary to popular belief that warm air means your cooling isn't working). That's because it's pulling the warm air out of the system, and if yours doesn't feel warm after a while, it could be that your ventilation is not working to the best of its ability. The thing that confuses me (and you as well) is that you say it'll crash only a few minutes after it's been turned on. While it's possible your CPU could heat up that quickly, there could be more going on. If you say your AC adapter shorted out recently, maybe (I'm grasping at straws here) there's a minor buildup of static electricity in your system. You could try removing your battery, holding down your power button for at least thirty seconds, replacing the battery, attaching your adapter, and booting it up. See if it crashes after that. If it still does, then the only thing I can think of is some sort of heat dissipation problem.
 

logostrom

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Jul 7, 2016
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You could try removing your battery, holding down your power button for at least thirty seconds, replacing the battery, attaching your adapter, and booting it up. See if it crashes after that. If it still does, then the only thing I can think of is some sort of heat dissipation problem.
I tried this, and like all the other fixes I've ever tried, it worked for a few hours and then the problem came back. I really think it's a heat problem, but I don't think that's the root of the problem if that makes sense. I don't notice my fan turning on very often, even after setting it to active. Unfortunately my BIOS is very lacking and doesn't have options to adjust the fan there either. I'm wondering if there's bad communication between the hardware and Windows 10, and the computer just can't figure out when to turn on the fan. This doesn't completely explain the problem though, because even after being off for hours and turning the computer on while plugged in it immediately shuts off. I've never once had the issue on battery power alone. If it were purely a heat issue, I would think it would occasionally happen on battery power as well.
 

logostrom

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Overheating laptops, for me has been caused by plugged vents and poor thermal paste on the CPU.
I've already opened up the laptop and cleaned everything out, replaced the fan with a new one, and have replaced the thermal paste twice.
 

logostrom

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Jul 7, 2016
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This may be a hardware issue. You don't appear to be alone in this. I'm not sure there's much you can do; it appears to be an A/C port issue or a motherboard issue. I assume your warranty has expired?
I read through the entire thread you linked to. That's definitely the problem I'm having, I'm surprised I didn't run across that thread over the last few months trying to solve this issue. I'll try calling Lenovo tomorrow, but my warranty is expired, so I doubt there's much they'll do for me. It's disappointing though because it seems to be a common issue, and it wasn't a cheap laptop. Maybe they'll surprise me though. Worst case scenario, is there anything I can do assuming they won't help?
 

Saturable

Mark
Joined
May 2, 2016
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366
Yes, but it will cost you. You should be able to contact Lenovo and order a new motherboard from them. Of course, you'll need to have adequate knowledge about dismantling a laptop, but also, it may be a bigger bite than you can chew. If your RAM is soldered on, you will need soldering experience. Also, you'll have to remove the CPU and remount it on the new board. A motherboard replacement is usually very tricky for non-gaming laptops.

I think the A/C port is attached to the motherboard, so a new motherboard should fix that as well, but I could be wrong. If it's a separate piece, consider ordering that first because it'll be a much easier replacement.

And then there's the risk that neither of these replacements will fix the problem because it seems to be hit and miss from what I've read on that forum post.
 

logostrom

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Jul 7, 2016
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Of course, you'll need to have adequate knowledge about dismantling a laptop
I contacted Lenovo today, and the representative said he has escalated my claim to upper management. He said that despite my computer being out of warranty, they may still grant me a complimentary repair because he confirmed that my issue is widespread. I'm hoping and praying that upper management agree with him, and fix this for me because I don't have the resources or know-how to perform the fix you mentioned.
 
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