[Discuss-gnuradio] 2 USRP1s, both loads firmware correctly, but only 1 can run ANY sdr apps. Why?

Hello,

I have 2 USRP1s, and either issuing the commands of lsusrp, from Gnuradio-3.4.2, (to work with OpenBTS),  both USRP1s reports back that I have a USRP1 with WBX daughter cards.

And of the 2 USRPs, when I run lsusb -v, it DOES show the following correctly: bcdDevice 1.04  just as it should per this following link:  

Re: [Discuss-gnuradio] Can't find firmware: std.ihx

https://lists.gnu.org/archive/html/discuss-gnuradio/2010-07/msg00523.html

But if I run any SDR apps, such as OpenBTS, or USRP_benchmark.py, or USRPping,  one of the two USRP1s just sits there, while the other always works correctly.  When I ran USRP_benchmark.py on one of the USRP1s, while it doesn't report back anything, I'll disconnect the power cord, and then the command prompt reports back USB Protocol Errors -71.  The other USRP1, ( the one that works), when I pull the power cord, the command line reports back fusb repeatedly and it always works with NO issues.

Why would 2 USRP1s work correctly when loading firmware, but only 1 of them can run any SDR app without errors?  Both USRP1s are in mint condition too and have matching Molex USB connectors.

Please help.

Peter