How to fix Not Valid Error Displays before the HP Computer Starts?

As a user of HP computer connects experts to have HP Technical Support to fix the following warning message displays showing that the system has found an invalid serial number: 

The message might appear once the system board is replaced. This message tells you that you have entered some wrong serial number or there is no serial number entered after replacing the system board or another component. In order to fix the problem, you will be required to contact support tab on this screen. Here, you will be asked to provide the fourteen-digit System Board Commodity Tracking (CT) Number.

Follow the steps given below in order to find the CT Number:  

• First of all you need to turn off the computer by pressing the Power button.

• Now, turn on the computer and press the Esc key continuously in every one second.  

• Next, you have to press F1 to review System Information.

• At last, you have to find the System Board CT Number listed on the System Information screen.

In order to find the number printed on the system board on your notebook computer, you need to open the memory access door or service door. Here, the CT number is placed nearby or beneath the primary SODIMM memory slot. 

For complete instruction in order to perform the operation, refer to the Maintenance and Service Guide for your notebook model, found in the User Guides section of your product page. In order to have more support and guidance from the experts at HP Support Phone Number +1-877-645-7494. Here, you will be supported by the representatives who are highly knowledgeable and are committed to delivering best and quick deliver best and quick support. 

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