No post after CPU swap - Area 51m

Discussion in '2015+ Alienware 13 / 15 / 17' started by cfortney, Nov 4, 2020.

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  1. cfortney

    cfortney Notebook Enthusiast

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    Hoping someone can point me in the right direction here, I have emailed Dell tech support about the issue but thought I'd try here. Laptop in question is an Area 51m specced with an i9-9900k. Like a lot of other people I found that it ran extremely hot. I had an i7-9700k in my desktop system, so I swapped the chips. Thinking the i9 is better suited on my AIO liquid cooler and the i7 in the laptop. But now the Area 51m will not post. The two CPUs share the same chipset so I'm not understanding what's going on here? Has anyone ever upgraded or downgraded their CPU in the 51m and encountered this issue?
     
  2. twin snakes

    twin snakes Notebook Consultant

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    Have you tried power drain the system? Sometime the bios does not have much love for the new stuffs, reset it may solve the problem
     
  3. cfortney

    cfortney Notebook Enthusiast

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    Is that where you hold the power button down until it starts blinking red? I have done that a few times but nothing happens when I release the power button. I'm getting no post or display, and a tech just swapped out the display and motherboard.
     
  4. twin snakes

    twin snakes Notebook Consultant

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    well basically, you will need to physically remove the battery pack, remove the coin cell battery (though not really necessary) and hold the power button for around 30-45 seconds, then put back everything and try power it on
     
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  5. pathfindercod

    pathfindercod Notebook Virtuoso

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    Did you unplug the battery before switching out the cpu?
     
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  6. Clamibot

    Clamibot Notebook Deity

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    You can also try a BIOS reset by removing all RAM modules, turning on the laptop, then quickly inserting a RAM module before it turns itself back on.

    Sometimes when adding new components, you have to give a computer a slap upside the head to play nice with new parts.
     
  7. custom90gt

    custom90gt Doc Mod Super Moderator

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    Wait what? Is that a real suggestion? Ram or other components should never be plugged in while the computer has power going to it (much less in the process of turning on). Bios reset should be done by removing the CMOS battery (along with main battery and power adapter) and pressing and holding the power button for 30 seconds or so.
     
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  8. Clamibot

    Clamibot Notebook Deity

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    Yes it's a real suggestion, not a joke. It's a process that helped unbrick Alienware laptops in the past, including my own.

    The process goes like this:
    Step 1: Remove all RAM modules.
    Step 2: Turn on the laptop.
    Step 3: Let the laptop angrily beep it's error code at you until it shuts off.
    Step 4: Before the laptop turns itself back on, quickly insert in a RAM module (just one in any slot). You have about 2-3 seconds before the laptop turns itself back on.

    After the laptop turns itself back on, it should now POST. This very process helped me recover from a bad undervolt, and I suggested it because I thought it could help @cfortney.

    Also make sure the i7 9700k isn't dead. It shouldn't have died just from a simple swap, but it's better to have covered all bases.

    Edit: @custom90gt Ah I see where your concern came from now. It was my wording. That was not the message I was trying to send. Oops:confused:.
     
    Last edited: Nov 15, 2020
  9. 0lok

    0lok Notebook Deity

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    I tried this steps before with my undervolt issue and this fixednthe problem.. But I think this process doesnt reset bios.. This process reset the laptop to its default voltage therefore fixing my undervolt issue.. As far as I know removing CMOS and disconnecting all power and draining power resets bios settings but not rolled backed to previous bios.. On the Alienware 15r3 there is no beep sound.. It a flashing light pattern on the alienware logo so be mindful when the laptop turns off when adding the ram on the laptop.. you really need to do this very fast.. Hope this helps..
    Edited:
    Try this step using the original cpu on your laptop as it might reset the voltage hoping to have post..
     
  10. devilhunter

    devilhunter Notebook Evangelist

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    could be a damaged CPU pin, what happens if you put back 9700k in your desktop?
     
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