invalid electronic serial number after motherboard swap out, HP Compaq 6200 Pro SFF

[Dark_Wahlburg]

I have a Z620 Workstation. Swapped the mother board and got the error.  

System ID screen displays:

Enter Asset Tag [                            ]

Enter Ownership Tag [                 ]

Tried entering S/N in each box, both boxes... no luck

Is there a different number somewhere on the motherboard? 

[wells51]

i have replace my motherboard with the same p/n as mine old one died i seen it got another model number and s/n on it can that be change as my board is a 577065-001 that my old one so i brought the same board same number 577065-001 and at moment i cant use my recovery on the new board what can i do my is a compaq laptop

[Safi7922]

The ESN (Electronic Serial Number) is also written in the middle of main board near to the processor.

[jattscorpion]

Hi, Been quite a while since I posted this question, laptop has already passed it's used by date and resting in peace.  

Thanks everyone for answering this question.  

[Anchau1]

Hi. Pls can I replace 6735 board with Compaq 615 ? thanks.