PSU light turns off when powering up laptop

Discussion in 'Alienware 18 and M18x' started by chewbakaats58, Sep 21, 2020.

  1. chewbakaats58

    chewbakaats58 Notebook Evangelist

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    Alienware 18 is not powering up at all. Seeing strange behavior with the power supply that when you plug it into the laptop the light on the psu instantly turns off. Tried removing the battery and run straight from the psu but same thing happens. Cannot get the laptop to power up at all because of it as the battery can't get a charge but I would think it should still power up with the battery removed. Suggestions?
     
  2. Chivalrous Roamin Knight

    Chivalrous Roamin Knight Notebook Enthusiast

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    How new or maybe more accurately, how old is your GPU (Graphics Card)? Do you have the OSD driver installed for the laptop; OSD is the On Screen Display and this allows you to switch manually to the 18's igpu (Integrated, Intel's GPU) when pressing the Function plus F5 key. I ask you this because, this very thing happened with my 18; unfortunately, my Nvidia GTX 980M GPU primary card was bad; the 18 was running in SLI mode then and now, I just run it in non SLI with a single GTX 980M.
    What happens, is that the PSU (Power Supply Unit) protects the system from shorting anything else out; maybe this won't be in your case. And, the light turning off, in turn, the system is protecting your PSU.

    1st step would be probably testing the PSU. Let us know what you find out. Good luck.
     
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  3. chewbakaats58

    chewbakaats58 Notebook Evangelist

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    It is almost 5 years old. What would you do to test the psu? Do you think it would just be best to remove both the primary and secondary 980m video cards and see if it powers up with them removed?
     
  4. Chivalrous Roamin Knight

    Chivalrous Roamin Knight Notebook Enthusiast

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    Unfortunately, I can't advise you on what you should do only because, I'm not certain of BIOS and gpu's and how they actually work; a guess would be to remove the cards and see if it powers up. I would say, if you had no previous issues with your PSU, I would think it is good; again, giving example of my exact instance where my PSU was fine. If I were you though, I would extensively search this forum and youtube for ideas and go from there. I don't think removing the cards and seeing if it runs on it's igpu would hurt it. If anything, I would think the 18's BIOS screen would boot up and I believe from there, you can set the BIOS for non sli and probably test either card for functionality.

    Did you experience any flawed graphic performance prior to the issue now? Any heat issues that you are aware of? The heat question is a big one because, I really believe that's what happened with my gpu going caput. Good luck. Again, let us know what you find, we all can learn and help each other through our own misfortunes. Hope I'm helping you somewhat. I KNOW how frustrating and disturbing when something happens to our beloved 18's.
     
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  5. Maxware79

    Maxware79 Notebook Deity

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    I am pretty sure that you have a faulty GPU. The board is detecting a short so it will shut your adapter off when it is plugged in.

    I would remove both GPU's and then try booting. Keep a note of which GPU is from Slot 1 and 2. If it boots then try the secondary GPU in the Primary slot. If it still works then your primary GPU is dead.
     
  6. chewbakaats58

    chewbakaats58 Notebook Evangelist

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    Thanks guys. It did end up being one of the gpus
     
  7. Chivalrous Roamin Knight

    Chivalrous Roamin Knight Notebook Enthusiast

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    Was it the Primary GPU? I'm asking because as maybe a warning or precaution, in my case, a very short time later, my other GPU went bad also; at least, this is what the local PC repair shop told me and I had to buy a new GPU and just run my 18 in non SLI.
     
  8. Maxware79

    Maxware79 Notebook Deity

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    Well at least you found the problem. It sucks that your GPU is toast though. There are some people that can repair MXM cards but it can be tricky
     
  9. Chivalrous Roamin Knight

    Chivalrous Roamin Knight Notebook Enthusiast

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    Maxware79.....That's good to know that some can repair the card. Do you know if it's very costly?
     
  10. Maxware79

    Maxware79 Notebook Deity

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    I don't really know, sorry. I guess it would depend on what is wrong with it.
     
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