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System board CT Number Missing or Invalid

HP Recommended
HP-15 ac134ne
Microsoft Windows 10 (64-bit)

Whenever I start my notebook I get this warning.


The following programmed into the system board is invalid or missing

system board(00A)-system board ct number.


this only happens when I start my laptop with my charger plugged in and it also throttles my cpu speed to 0.48ghz.


when on battery is pc starts up fine with no warning.


its confusing me that my pc starts up and cpu runs normally if its all on battery but throttles the cpu speed when plugged in


Specs are;

core i3 5005u 2.00ghz

12gb ram ddr3

intel hd 5500


please help me fix this as my battery isn't that good and I have to keep it plugged in most of the time but it wont even charge when turned on cause of only charges when it is turned off or in sleep mode.



HP Support Agent
HP Support Agent
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HP Recommended



I reviewed your post and I understand that you are getting an error saying System board CT Number Missing or Invalid.


Don’t worry, I assure you I will try my best to get this sorted.


I recommend you follow the steps in the below article and check if it helps.


Let me know how it goes and you have a great day!


P.S: Welcome to the HP Support Community 😊


If you wish to show appreciation for my efforts, mark my post as Accept as Solution. Your feedback counts!



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I am an HP Employee

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