Hello Mahbubur Rahman: What is the exact command that you're using to burn the SD Card?? Make sure that the SD Card is not mounted and is not in use when you're trying to write to it. You mentioned that you're using uhd-images_003.010.twinrx-devel-234-g6189cea6. You should not be using this version. You should be using a tagged release of UHD, such as 3.9.4. The images for 3.9.4 are here: http://files.ettus.com/binaries/images/uhd-images_003.009.004-release.tar.gz --Neel Pandeya On 14 June 2016 at 13:28, md mahbubur via USRP-users < usrp-users@lists.ettus.com> wrote: > Hi, > Currently, I am working with USRP2 device for my research. I have been > trying to activate this previously used device for last three days but > failed to make it talk to my computer(Mac OSx El Capitan) via ping command > (usb2 ethernet adapter is used for connection between computer and device; > also direct ethernet cable connection was tested with another pc but seems > the device is dead, no response!). Then I assumed the there might be a > firmware issue. I erased the sd card and tried to copy usrp2_fw.bin and > usrp2_fpga.bin files via sdcard_burner_gui.py program but the program was > giving an error saying "the dd/disk3: resource is busy!". However, Then I > tried to copy those files by drag and dropping them, which copied well but > couldn't help to communicate the device. The device loads the firmware > first and stays with only F LED indicator lit up. In this instance, I need > suggestion what should I do to make it run! P.S. bin files are collected > from uhd-images_003.010.twinrx-devel-234-g6189cea6 folder from > ettus support website. Thanks > [image: Inline image] > > Regards, > Mahbubur Rahman > Univerity of New South Wales, Australia > > Sent from Yahoo7 Mail on Android > <https://overview.mail.yahoo.com/mobile/?.src=Android> > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > >