Jeff Brower wrote: > U12 is the PHY. PHYs tend to run somewhat hot, so likely what you're seeing > is Ok. But, with the top off, you could > try pointing a large fan at the chip, and see what happens again from cold > start. If the fan reduces the chip surface > temperature to the point where you can hold your finger there (at least for > 30 sec or so) and you still have the > connectivity issues, then you can rule out a chip/board/heat problem. >
The power has been disconnected for about an hour and I removed the lid, pointed the fan at the device and powered up. find_usrps fails to see the device although the link is up and the packets are being sent to it. I can hold my finger on the chip for no more than 4-5s. I concluded we're in dodgy PHY chip territory but Matt has suggested I remove the WBX daughterboard and see if the USRP2 responds. find_usrps worked for a few minutes but eventually fails. The unit is now being returned.
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