Hp Compaq Invalid Electronic Serial Number

My motherboard was replaced after having an issue but during bootup i get a loud beep followed by 'Invalid Chassis Serial Number'. I have looked across forums and they say to press F10 to get into BIOS then CTRL A to be able to enter the Serial Number. First my machine is HP Prodesk 600G1 Tower PC.

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Invalid Electronic Serial Number

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Issue:
After system-board replacement, booting the unit causes an error message at post regarding an invalid electronic serial number.
Hp compaq 6200 pro invalid electronic serial numberSolution
  1. Press CTRL A.
  2. Select Advanced, System IDs, and enter the serial number from the service tag sticker on the chassis.
For desktop branding, customers need to fill the following details availble on the HP sticker of the unit.
Please fill in the following details under system IDs:

Hp Serial Number Laptop

To enter into the system ids tagf10>CTRL +A>Security>System ids
Ownership tag: LEAVE IT BLANK
Product Name: HP Compaq Pro 4300 SFF
Build id: 12WWPIIW6**#SABA#DABA
Serial
Feature Byte: 2U3E 3Q3V 3X47 5c67 6J6K 6S6b 7B7H 7M7Q 7T7W 7aaB agap aq .t2(THE FEATURE BYTE IS CASE SENSITIVE AND DO NOT LEAVE ANY BLANKS WHILE FILLING THE BUILD ID)
Once the unit accepts the changes,select SAVE CHANGES AND EXIT.

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