MSP-FET: 2/3 Faulty MSP-FET flash tools

Tool/software:

Hi,

We have three MSP-FET flash devices (black ones with CE on the back). These three have been working fine, up until two of them just stopped working.

I am trying to debug/program a MSP430F5994 MCU using JTAG 4-Wire, but whenever I try to debug via CCS I receive the following message on the faulty debuggers:

Error connecting to the target: Could not erase device memory

Going further, I tried to dump some information to terminal using the MSP430Flasher.exe tool. On both the faulty debuggers I get one of the following:

MSP430Flasher.exe -n MSP430FR5994 -r [output.txt,MAIN] -z [VCC=3300]

* Evaluating triggers...done
* Checking for available FET debuggers:
* Found USB FET @ COM11 <- Selected
* Initializing interface @ COM11...
# Exit: 19
# ERROR: Interface Communication error

or

* Setting VCC to 3300 mV...done
* Accessing device...
# Exit: 16
# ERROR: Unknown device

Using the non-faulty MSP-FET, the device dumps the information fine and the process completes successfully.

I also have a MSP-FET430UIF debugger and have been using that for the past 5 years with no issues.

I have been trawling through these forums with hopes of a solution, but with as many people who have been experiencing the same problem I am yet to find a solution that actually works.