LA 16700A或167xx模块问题

您好，我有一台16700A逻辑分析仪，安装了两个16741A模块。
经过6个月的暂停后，我尝试使用该仪器，但上电后显示出一些错误。
我运行了自检，显示卡上没有错误（主机自检程序没有错误）。
自检的多次运行表明，一些错误只出现了几次（取决于运行时间，即预热时间）。
我认为这是一个糟糕的接触问题，所以我用BGA的焊料和热空气重新加工了PCB。
我设法清除了一些错误，除了在每次运行中坚持和失败的三次自我测试。
这些自检是：“分析仪芯片存储器总线测试”“系统时钟（主/从/ Psync）测试”“分析仪存储器总线SU / H测量”我宣布这些卡为“DEAD”并从eBay订购了一台二手16750A。
我得到了16750A，当我运行自检时，出现了与16741A卡相同的三个错误。
问题是：这些错误是由16700a主机引起的，还是新卡也有缺陷。
如果错误是由大型机引起的，那么有人知道在哪里看？
电源似乎工作正常，虽然有些电压与标称值不完全相同，但在多输出开关模式电源（我猜）时这是正常的。
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     以下为原文

  Hello,

I have a 16700A logic analyzer with two 16741A modules installed. After a pause of 6 months I I have tried to work on the instrument, but after power-up it has showed some errors.
I ran the self tests which displayed few errors on the cards (no errors on the mainframe self test routines).
Multiple running of the self tests showed that some errors appeared only a few times (depending on running time, ie wARM up time). I assumed it is a bad contact problem, so I reworked the PCB with solder and hot air for the BGAs. I managed to clear some errors, except of three self tests which insisted and failed on every run. These self tests are:
"Analyzer Chip Memory Bus Test"
"System Clocks (Master/Slave/Psync) Test"
"Analyzer Memory Bus SU/H Measure"

I declared the cards as "DEAD" and ordered a used 16750A from eBay.
I got the 16750A and as I ran the self tests the same three errors appeared as with the 16741A cards.

The question is: could these errors be caused by the 16700a mainframe, or is the new card also defective.
If the errors are caused by the mainframe, does anybody have an idea where to look? The power supply seems to work ok, although some voltages are not exactly as the nominal values, but it is normal at multi-output switch mode Power Supplies (I guess).

Any help would be highly appreciated