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PXI-2532b - short circuit

I hope someone can help with a problem related to the PXI-2532b card. 
I am working with a system which contains of 4 x PXI-2532b + 1 x PXI-4110 and 1 x PXI-4065 cards. The system is used to check all internal connections (both directions) of a DUT. The System is normally working fine, but we have laterly seen some defects related to the PXI-2532b cards, where one of the crosspoints connections on the card has short-circuited (not the same crosspoints each time). 
Has someone experienced similar problems and how did you fix it ? 
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Your description seems more like a loose contact in the cabling and not a faulty Reed relay (but I don't rule out a possibility). The best approach is to start narrowing down the faulty cross point using a test circuit.


My technique of choice would be to start powering up a known voltage (current limited by 1k resistor) on one row and connect all other rows to GND, now cycle through each column measuring the voltage, if you don't measure the right voltage, that crosspoint is potentially damaged.

Semiconductor Validation & Production Test
Soliton Technologies
LabVIEW + TestStand + TestStand Semiconductor Module (2013 - 2020)
NI STS for Mixed signal and RF
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Some additional information ... when I replaced the PXI card the problems disappeared. 


The faulty card was repaired, unfortunately I didn't get a detailed error description, so I don't know if it was related to a faulty Reed relay or something else. 


Consider if a transient voltage could be the reason and if a varistor or a VRS diode across the reed relay could fix the problems. Does someone have experience with adding some kind of transient protection to a PXI-2532b card ?



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