请问我升级03458-91000 A2板时错过了什么吗？

问候一个，这是我的第一篇文章，所以我会努力使它成为一个好的。我是在菲尼克斯的精密测量实验室工作的国防部承包商。
我有一个3458A，我正在升级03458-91000 A2板，取代目前安装的03458-66502板。
据我所知，这将为我的3458A提供4ppm的Opt 002 Hi-Stability Reference。
换掉电路板并预热后，我启动了ACAL ALL。
在ACAL的AC部分期间，我收到此错误：“204，HARDWARE FAILURE，AC VOS DAC CONVERGENCE：1837035519。”
在做了研究之后，我发现这个错误（204）与我刚刚安装的卡有关。
我仔细检查了所有连接，重新运行ACAL并得到了同样的错误。
我把旧卡放回去，运行ACAL，它工作正常。
我的问题是;
我错过了什么吗？
是否需要将软件或其他类型的更新输入到设备中，或者我的91000 A2板是否有用？请提前感谢您的帮助。



     以下为原文

  Greetings one and all,

This is my first post, so I'll try to make it a good one.

I am a DoD contractor working at a precision measurement lab in Phoenix.  I have a 3458A that I am upgrading with a 03458-91000 A2 board, replacing the 03458-66502 board currently installed.  It is my understanding that this will give my 3458A the Opt 002 Hi-Stability Reference, 4ppm.  After swapping out the board and wARMing up the unit, I initiated ACAL ALL.  During the AC portion of the ACAL, I receive this error: "204, HARDWARE FAILURE, AC VOS DAC CONVERGENCE: 1837035519."  After doing research, I found that this error (204) pertains to the card I just installed.  I double-checked all the connections, re-ran ACAL and got the same error.  I put the old card back in, ran ACAL and it worked fine.  My question is; am I missing something?  Is there a software or some other kind of update that needs to be input into the unit, or is my 91000 A2 board a dud?

Thanks in advance for your help.