PXI-4110 Long-Term Fuse Reliability Recall

I home someone here can provide the info I am looking for. This past October I had a PXI-4110 Triple Output Supply go belly up. It would not pass self-test at all. Appeared to have no communication. After a $530 RMA repair, the board was fine. Today, I have 3 more of the exact same card (all purchased at the same time and only a short time out of warranty). All show the same error as the one in October. All failed in one day (today) with error number -200175. Speaking to NI I find out that it is most likely a fuse and it needs to be sent in on an RMA. Again at $530 a pop. To replace a fuse. A fuse that is apparently at the heart of a "Long-Term Fuse Reliability Recall" that specifically affects PXI-4110.
Now, at this point it is not even the money, (though it angers me to no end knowing I paid $530 to fix a product with a known defect and that was under recall, but was not informed of it), but the fact that losing the cards for the 10 business days will effectively cost over $50K in lost shippable product.
We have Certified soldering techs who work under a microscope replacing surface mount components all day. We can replace the fuse. My understanding is that the fuse gets "tired" and is replaced with a different one.
I need to know 2 things:
What is the original value of F9 on this card?
What is it replaced with?
I find it hard to believe that NI would not give me the info I need to make a quick repair. We did  not receive any recall letter either. Can anyone help???

Hi Franco,
I believe that the situation regarding being charged your RMA is being resolved as your board was covered under the recall notification that was sent out. The notification was sent out to the company we have on record who purchased the board. The RMA charge would not apply for a unit under recall.
The recommended method for repairing the boards is to send them in to NI for repair. We cannot authorize the modification of our boards and it would void the warranty on the product. When the F9 Fuse blew it is possible that other components could have been damaged and also the action of replacing the fuse would likely change the calibration of the device. When sent back to NI for repair the device would undergo testing and calibration to ensure it meets all specifications.   
We recommend that affected 4110's be sent in for a preventative repair.
Steve B

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    There may be a way to iterate over the registered sessions, but I couldn't find it. However, you can unregister them by calling "IVI Delete Session". Look for it inside "niDCPower Close.vi". If you don't have the list of open sessions, but you have the device name, then you can just append (1), (2) and so forth and call "IVI Delete Session" in a loop. There's no problem calling it on sessions that were never added.
    However - I consider all this a hack. What you should do is write code that does not leak sessions. Anything you open, you should close. If you find yourself in a situation where there are a lot of leaked sessions during development, relaunching LabVIEW will clear it out. If relaunching LabVIEW is too much of an annoyance, then write a VI that does what I described above and run it when needed. You can even make it "smarter" by getting the names of all the NI-DCPower devices in your system using the System Configuration or niModInst APIs.
    Hope this helps.
    Marcos Kirsch
    Principal Software Engineer
    Core Modular Instruments Software
    National Instruments

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