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    HP Pavilion DM4 overheating issues: Replaced the fan, fan working well, but overheating still occurs

    Discussion in 'HP' started by kumar935, Sep 23, 2014.

  1. kumar935

    kumar935 Newbie

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    I have a 3 year old HP pavilion dm4 (4GB RAM, core i5, ATI 512MB graphics card).

    I've had overheating issues for a while, but still managed to use the laptop by using a cooling pad for almost 6 months (I understand I shouldn't have, but I was kind of lazy to get it fixed). Then my display went bonkers, so I did some troubleshooting, uninstalled the ATI radeon driver, in safe mode, and didhard reset and stuff, but still my display didn't work, so I went to a laptop repair shop, and supposedly got my display AC and paper LED screen replaced because they were the culprit. Display started working fine, but shi* went out of the window when it came to overheating issues. My laptop would shut down unexpectedly and then the ERROR 90D would appear on startup, and laptop would run for a while then shut down suddenly.

    I again went to the repair shop, and got my cooling fan replaced. But, overheating still persists! I can hear the fan running (which I didn't use to hear before) when I listen near the fan area. It'd run for an hour or so, then the same thing. It'll shut down unexpectedly.

    Another thing is that, before there use to be option to switch between my graphics cards: intel HD and ATI, but now, when I right click, there's no such option. when I right click, I only see the option to go to ATI graphic settings, whose driver I've uninstalled which it says in the error message when I click on it.

    PS: My ATI graphics card stopped working a long time ago (about an year) and I never used it after that, I only used the intel HD one.
     
    kumar935, Sep 23, 2014
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  2. VonCrisp

    VonCrisp Notebook Evangelist

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    Hi Kumar,

    Honestly speaking this sounds bad!

    Looks like you might have a few issues here:

    Fried AMD chip / Old worn out heatsink

    OR / AND non working switchable graphics drivers. (could be part of the AMD chip being fried)

    I would say it is important to establish if your AMD card runs at all.

    Clean with DDU in safe mode. Install display drivers from HP (the bundle should include Intel and AMD in one driver).

    If the laptop crashes during switching or starts displaying some sort of errors in device manager it is most likely fried.

    If the card is not fried and switching works then you might have to consider replacing the copper pipe. (I am surprised this wasn't done already)
     
    VonCrisp, Sep 25, 2014
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