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Dell Laptop BIOS Alert: AC Power Adapter Wattage and Type Undefined, Performance Drop

piotreG2705 38262 11
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  • #1 16083976
    piotreG2705
    Level 8  
    Hello, I have a little problem. Today, when I turn on my Dell laptop, a BIOS window pops up with the following warning:
    Alert! The AC power adapter wattage and type cannot be determined. The battery may not charge. The system will adjust the performance to match the power available.

    I have no idea what's going on, it seems as if the whole laptop was slower (In the counter strike game with 140 FPS it dropped to 6-8) ..
    Please help :/
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  • Helpful post
    #2 16084015
    sosarek

    Level 43  
    Damaged power supply or socket - no communication, hence this information. At the beginning, replacing the power supply with another one, if the situation repeats the socket to be replaced.
    Helpful post? Buy me a coffee.
  • #3 16084029
    piotreG2705
    Level 8  
    And that's why my laptop's performance dropped so much? I was doing a scan today because I thought it was some kind of virus and I just got "performance problem"
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  • #5 16084071
    piotreG2705
    Level 8  
    I turned on the battery itself and no notification popped up. It's better in the game, but I have a mouse lag. I don't know what it's caused by. I've had the same problem before and people told me to turn off "Game DVR" in XBOX. It helped. Now I'm out of ideas :(
  • #7 16084084
    piotreG2705
    Level 8  
    But just for a moment, I've already turned it off. I will check this power supply for days and write what they told me
    edit: But the power supply charges me this battery
  • #8 16084103
    sosarek

    Level 43  
    Go to Bios and check, it may not load it properly. This is also the case when using a weaker power supply (65W instead of 90W).
    Helpful post? Buy me a coffee.
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  • #9 16084174
    piotreG2705
    Level 8  
    My power supply is just 65W
    It just makes me wonder why it was only after such a long time that problems started to appear, it bothers me
  • #10 16084211
    sosarek

    Level 43  
    Enter Bios and check if it recognizes the charger correctly.
    sosarek wrote:
    Damaged power supply or socket - no communication, hence this information.
    Helpful post? Buy me a coffee.
  • #11 16086272
    piotreG2705
    Level 8  
    Can you tell me how to do it?
  • #12 16086396
    sosarek

    Level 43  
    Replace the power supply with another - more powerful one. If the problem persists and you do not have the knowledge or the appropriate tools - service.
    Helpful post? Buy me a coffee.
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Topic summary

A Dell laptop user encountered a BIOS alert indicating that the AC power adapter wattage and type could not be determined, leading to a performance drop. Responses suggested potential causes, including a damaged power supply or socket, and the use of an underpowered adapter (65W instead of 90W). Users discussed troubleshooting steps such as checking BIOS settings, replacing the power supply, and ensuring proper communication between the laptop and the adapter. The user noted improved performance when running on battery but experienced mouse lag, prompting further investigation into the power supply and system settings.
Summary generated by the language model.
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