Hi Orlando
Short answer: It's not possible to change the hardware on a OEM Appliance.
Long answer:
You need to validate the end date of your hardware warranty.
Symantec recommends that you replace hardware older than five years with a new appliance.
More information available at: https://support.symantec.com/en_US/article.HOWTO111548.html AND
Also, be careful if you decide to modify the hardware , based on the following EULA SMG this is the restriction that you have:
8. HARDWARE WARRANTY SERVICE RESTRICTIONS/EXCLUSIONS
The warranties contained in this Warranty Agreement will not apply to any Hardware which:
(A) has been altered, supplemented, upgraded or modified in any way not authorized by Symantec;
(B) has been repaired except by Symantec or its designee
If this works for you please mark the post as solved.
Best Regards