Good day Samero ,
Thank you for writing to Dell Community Forum !
With error code 2000-0122 involves memory test initialization failure .If the error code follows the system even after installation of the new memory module then it denotes the slots are faulty .So replacing the system board would clear the error log and boot the system too windows.Alternatively if this system's original memory module works fine on a different system then also you can confirm the same .
I would request you to provide the system model ,service tag of the system ,system owners name ,contact no ,physical address ( via private message ) so that I can verify the details needed to assist you with a service call .
If the system is out of warranty you can purchase the part from any dell authorized re-seller or we can arrange for a quotation .
Hoping to hear from you soon .
Kindest Regards ,