Fabiomoraes05, The VLT0204 error is referring to the system hardware detected an over voltage or under voltage condition. Are you seeing anything in the system logs that are referencing the power supplies?  What we can also try is taking the server to a Minimum to Post configuration, that is removing everything but the following from the server. Once the server is at a Minimum to Post configuration, are you still getting the error? Let me know what you see.
Hello,  I have a poweredge R720 and today it´s showing a message error on display: VLT0204 - system board PS2 PG fail voltage is outside of range . contact support.   Does anybody know this error? Thanks
Fail voltage poweredge r720