No AI/O on PCI-6110 board, time to send for repair?

[gandg]

Hi all - just wanted to sanity check if the issues with our PCI-6110 board mean we'd have to arrange a repair request. Currently:

1. When testing on NI MAX, AI0 and AI1 read 10V irrespective of what's sent to them. 

2. When testing on NI MAX AO0 and AO1, there is barely any voltage change on oscilloscope, no matter what is being generated (Voltage DC or Sine wave). The response is not completely flat. When sine wave amplitudes are low (eg. 22mV), there is 'something' on the oscilloscope at the correct frequency (Image 1, note oscilloscope probe is 10X). This drops to nothing when larger amplitudes are passed on.

3. On NI MAX, Self-test passes. However Self-Calibration does not and returns an error: -200545 'Self calibration failed. Externally calibrate the device to recalibrate the onboard voltage'. 
4. I attempted to run the DAQ Diagnostic Utility, however the I cannot select the potentially faulty board, even if it appears in NI MAX (Image 2). 

5. The board does send out a TTL for opening and closing our laser shutter as before, so I think it's just the analogue part that's failing...
6. The cable connections seem okay.

Does the aforementioned mean that I definitely need to send the device to be repaired - does this sound repairable? 

Context: The card was working last week. We are using two boards (PCI-6110 and PCIe-6321) to control out microscope, installed in 2014. I noticed weird laser intensity modulation and eventually found out that the mains in our lab have a persistent noise. As long as the PC and the monitor are plugged to either of the sockets in the lab wall (even if everything is off), a periodic noise will be detected on the oscilloscope connected to the BNC pinout boards of either of the cards. The amplitude was 5mV, but some devices operate at fairly low voltage ranges so it is enough for a visible impact. We found a way to work around it by using another set of sockets. As a part of this troubleshooting process I opened the PC and took the cards out, the PC was most definitely off. Additionally, I put the cards in another PC, once again, off. They were later put back in their original slots.

After that NI MAX started to crash with an error: The MAX Database exited abnormally, relevant NI processes were unable to start in Services. No devices were shown or testable on NI MAX either. Device drivers could not be found after resetting them. In the process I:
1. Reinstalled DAQmx 14.2, this did not help.

2. Reset MAX configuration settings after backing up previous ones (as in: https://knowledge.ni.com/KnowledgeArticleDetails?id=kA03q000000YHyGCAW&l=en-GB). I haven't put the file back, however this helped and NI MAX started working normally; I was able to re-install the drivers to both cards I reset before. 

3. The other card, PCIe-6321 works normally, self calibrates and shows correct AO / AI.

4. The PCI-6110 malfunctions, as explained in the previous section of this post. 

In addition to the original question about repair, if you have any ideas on why the whole saga of issues (MAX database corruption and then one of the board's analogue system being supposedly toast) started after I put the cards out and back in again with the PC off, I would appreciate it.  Following these threads: https://forums.ni.com/t5/Multifunction-DAQ/Self-Calibration-Error-200545-PCI-6033e/td-p/1794236 and https://forums.ni.com/t5/High-Speed-Digitizers/PCI-5122-Self-calibration-fails-no-input-from-card/td... it is suggested to try the card in a different slot or put it in a different PC. I must admit I'm quite terrified of touching them again...!

Thank you and apologies if I am missing something obvious in this.