Aspire 515-56G heatsink gets real hot without any power source connected

GraemeJ
GraemeJ Member Posts: 19 Troubleshooter
edited April 2023 in Aspire Laptops

I thought I had posted this question yesterday, but I can't find it anywhere, so I guess I did something wrong :( . I'll try again.

I have an Aspire 515-56G, Ser. Nº NXA1MEB00XXXXXXXXXX, SNID Nº XXXXXX which seems to have an obscure fault.

The machine is almost permanently running on mains power, rarely on battery alone. Four or five times since it was purchased, charging has ceased and the battery has run out of power. On each occasion, turning off the mains power for a few seconds and then turning it on again has cleared the fault (whatever that may be).

However, the last time this happened, turning the power supply off and on failed to restore any life to the computer. So, I powered down the machine and left it to one side, with the mains power disconnected. When returning to it a few minutes later, I noticed that it was quite hot, which was a surprise, since the battery had only been registering some 3% and everything was turned off.

Taking off the bottom panel revealed the heatsink system was very hot. Way too hot to touch. More importantly, it wasn't getting any cooler, despite the fact it was not connected to the mains and the computer was powered down (so, presumably, not having any reason to draw power).

Since the only power source available was the internal battery, I disconnected it from the motherboard. The heatsink finally started to cool down. Left it for 24 hours, re-connected the internal battery and external power supply, then turned the machine on. It has now functioned perfectly for the last five days.

What worries me is the fact that a computer that was turned off and disconnected from the mains power was, in fact, draining the battery and getting extremely hot. Needless to say, the fan was not running and I'm concerned as to what might have developed (a fire, perhaps) had this happened in my absence?

Has anyone else experienced this?

Regards

Graeme

[Edited the content to hide sensitive information and to add issue detail]

Answers

  • Puraw
    Puraw ACE, Member Posts: 14,047 Trailblazer

    A couple of things, when you had the laptop open did you check the condition of the fan(s), there may be dirt accumulated at the inlet of the heatsink (small grill) blocking the airflow, disconnect the battery and remove the fan and cable to clean this, in my case I had to peel off a layer of dust and lint that after 3 years completely blocked the air flow. Your's is only 1 year old I guess but it could happen. Don't use the High Performance Power Plan in Windows11 but Balanced. Don't have a soft cloth or carpet under your laptop but keep it raised above a table top, free from large objects that can block the airflow (operate in a cool room).

    Your fan(s) should still be OK but if you hear a high pitch sound when at full speed (when starting up) you may have a bad fan motor bearing, NO OIL, just replace the fan(s).

    Check the condition of your battery by creating a Battery Report in Windows11

    powercfg /batteryreport /output %USERPROFILE%\Desktop\battery_report.html

    Open the file on your Desktop (double click) and compare the Full Charged Capacity with the Designed Capacity, if very low replace your battery.

  • JackE
    JackE ACE Posts: 45,081 Trailblazer

    So, I powered down the machine and left it to one side, with the mains
    power disconnected. When returning to it a few minutes later, I noticed
    that it was quite hot, which was a surprise, since the battery had only
    been registering some 3% and everything was turned off.

    Open Control Panel. Search 'button'. Click 'change what the power buttons do' in left pane. Click 'change settings that are currently unavailable' near the top of the next pane. Scroll down and UNcheck the box for fast startup. Save and exit.

    Jack E/NJ

  • GraemeJ
    GraemeJ Member Posts: 19 Troubleshooter

    Firstly, I should say a moderator edited my original message and the title no longer reflects the real problem.

    Thanks for your response, but it doesn't really answer the question as to why a laptop which was turned off and not connected to an external power source should get very hot?

    To address the points you made;

    The fan was fairly clean and little dirt/dust collected overall. I did, however, take to opportunity to give it a clean while I was there. I also did this a year ago when I installed a second HDD (it's about two years old).

    I run in 'better battery' mode - although this really doesn't matter much as it's almost always on mains power.

    The machine always sits on a hard surface, no carpet/ cloth etc. to impede the airflow. A 'cool room' is not always possible, I live in southern Spain :) .

    The fan runs quietly (except of course when this fault showed up, when it didn't run at all!).

    The condition of the battery is immaterial. My problem is the battery appeared to be draining when the machine was turned off.

  • GraemeJ
    GraemeJ Member Posts: 19 Troubleshooter

    A moderator edited my original message again and the title now reflects the real problem.

    Thanks for your response, but it doesn't really answer the question as to why a laptop which was turned off and not connected to an external power source should get very hot?

    Following your suggestion, I have disabled the fast start-up option. Whether this will have any effect is hard to know - it's probably a case of wait and see.

  • JackE
    JackE ACE Posts: 45,081 Trailblazer

    Fastboot option is known to sometimes cause laptops from not completely shutting down or hibernating properly. It is not worth the small amount of boot time saved to risk damaging the battery. So disabling fastboot is recommended.

    Jack E/NJ

  • GraemeJ
    GraemeJ Member Posts: 19 Troubleshooter

    OK - now I understand. Nothing more that I can do, just wait and see if it occurs again. Thanks for the help.

  • JackE
    JackE ACE Posts: 45,081 Trailblazer

    Yeah. Let us know one way or the other after a few days. Thanks.

    Jack E/NJ

  • GraemeJ
    GraemeJ Member Posts: 19 Troubleshooter

    It may take a bit longer than a few days - this is the first time I've seen this happen in two years :) .