Gn nettest interwatch 95000 protocol analyzer

What is for sale: Gn nettest interwatch 95000 protocol analyzer

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GN Nettest interwatch 95000 ATM/LAN/WAN Protocol analyzer
Unit operate on 100-240V 8A 50/60Hz
Note: The 1st time it was power on, the software is display on the screen. But the 2nd time the display show: Boot failure-no boot device configured.
I do not have the ability to test this unit. Sell as it is. No refund.