deng

I have tried with nothing connected with Master Brick.But it still doesn't work.

yes.it work before.and other bricklets all can be flashed.just the master-brick can't work.

yes,I have try many times.

I have try the erase button.but it doesn't work.

[ 2.974534] usb 6-1: New USB device found, idVendor=045e, idProduct=0040 [ 2.974577] usb 6-1: New USB device strings: Mfr=1, Product=3, SerialNumber=0 [ 2.974619] usb 6-1: Product: Microsoft 3-Button Mouse with IntelliEye [ 2.974660] usb 6-1: Manufacturer: Microsoft [ 2.977575] sda: sda1 sda2 < sda5 sda6 sda7 > [ 2.977998] sd 0:0:0:0: [sda] Attached SCSI disk [ 2.981585] scsi 1:0:0:0: CD-ROM HL-DT-ST DVD-ROM GDRH10N 0D04 PQ: 0 ANSI: 5 [ 2.985686] sr0: scsi3-mmc drive: 48x/48x cd/rw xa/form2 cdda tray [ 2.985727] cdrom: Uniform CD-ROM driver Revision: 3.20 [ 2.985876] sr 1:0:0:0: Attached scsi CD-ROM sr0 [ 2.985983] sr 1:0:0:0: Attached scsi generic sg1 type 5 [ 2.987787] scsi 2:0:0:0: CD-ROM HL-DT-ST DVD+-RW GSA-H31N B106 PQ: 0 ANSI: 5 [ 2.991126] sr1: scsi3-mmc drive: 48x/48x writer cd/rw xa/form2 cdda tray [ 2.991266] sr 2:0:0:0: Attached scsi CD-ROM sr1 [ 2.991375] sr 2:0:0:0: Attached scsi generic sg2 type 5 [ 2.992764] Freeing unused kernel memory: 932k freed [ 2.993076] Write protecting the kernel read-only data: 12288k [ 2.997126] Freeing unused kernel memory: 1472k freed [ 3.000578] Freeing unused kernel memory: 1136k freed [ 3.016502] udevd[100]: starting version 175 [ 3.065890] tg3.c:v3.123 (March 21, 2012) [ 3.089269] tg3 0000:03:00.0: eth0: Tigon3 [partno(BCM95754) rev b002] (PCI Express) MAC address 00:19:b9:1d:7c:bb [ 3.089323] tg3 0000:03:00.0: eth0: attached PHY is 5787 (10/100/1000Base-T Ethernet) (WireSpeed[1], EEE[0]) [ 3.089373] tg3 0000:03:00.0: eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[0] TSOcap[1] [ 3.089420] tg3 0000:03:00.0: eth0: dma_rwctrl[76180000] dma_mask[64-bit] [ 3.095599] usbcore: registered new interface driver usbhid [ 3.095642] usbhid: USB HID core driver [ 3.096616] Floppy drive(s): fd0 is 1.44M [ 3.113965] FDC 0 is a post-1991 82077 [ 3.118118] input: Microsoft Microsoft 3-Button Mouse with IntelliEye as /devices/pci0000:00/0000:00:1d.1/usb6/6-1/6-1:1.0/input/input2 [ 3.118545] hid-generic 0003:045E:0040.0001: input,hidraw0: USB HID v1.10 Mouse [Microsoft Microsoft 3-Button Mouse with IntelliEye] on usb-0000:00:1d.1-1/input0 [ 3.216036] usb 7-1: new low-speed USB device number 2 using uhci_hcd [ 3.391172] usb 7-1: New USB device found, idVendor=413c, idProduct=2106 [ 3.391224] usb 7-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 3.391319] usb 7-1: Product: Dell QuietKey Keyboard [ 3.391356] usb 7-1: Manufacturer: DELL [ 3.409410] input: DELL Dell QuietKey Keyboard as /devices/pci0000:00/0000:00:1d.2/usb7/7-1/7-1:1.0/input/input3 [ 3.409534] hid-generic 0003:413C:2106.0002: input,hidraw1: USB HID v1.10 Keyboard [DELL Dell QuietKey Keyboard] on usb-0000:00:1d.2-1/input0 [ 9.582047] EXT4-fs (sda5): INFO: recovery required on readonly filesystem [ 9.582061] EXT4-fs (sda5): write access will be enabled during recovery [ 10.632088] EXT4-fs (sda5): recovery complete [ 10.639994] EXT4-fs (sda5): mounted filesystem with ordered data mode. Opts: (null) [ 20.398513] Adding 1951860k swap on /dev/sda6. Priority:-1 extents:1 across:1951860k [ 20.672707] EXT4-fs (sda5): re-mounted. Opts: (null) [ 21.099372] EXT4-fs (sda7): mounted filesystem with ordered data mode. Opts: (null) [ 21.426216] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [ 21.443678] RPC: Registered named UNIX socket transport module. [ 21.443682] RPC: Registered udp transport module. [ 21.443683] RPC: Registered tcp transport module. [ 21.443685] RPC: Registered tcp NFSv4.1 backchannel transport module. [ 21.444769] FS-Cache: Loaded [ 21.447845] NFS: Registering the id_resolver key type [ 21.447855] Key type id_resolver registered [ 21.447857] Key type id_legacy registered [ 21.447863] FS-Cache: Netfs 'nfs' registered for caching [ 21.454328] Installing knfsd (copyright © 1996 okir@monad.swb.de). [ 21.495941] udevd[593]: starting version 175 [ 21.527079] init: idmapd-mounting (/home) main process (493) killed by TERM signal [ 21.532564] init: idmapd-mounting (/eda) main process (503) killed by TERM signal [ 21.533259] init: idmapd-mounting (/proj) main process (507) killed by TERM signal [ 21.544707] lp: driver loaded but no devices found [ 21.580325] ACPI Warning: 0x0000000000000860-0x000000000000087f SystemIO conflicts with Region \_SB_.PCI0.GRFX.TCOI 1 (20120320/utaddress-251) [ 21.580332] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver [ 21.580335] lpc_ich: Resource conflict(s) found affecting iTCO_wdt [ 21.580338] ACPI Warning: 0x0000000000000828-0x000000000000082f SystemIO conflicts with Region \GIC3 1 (20120320/utaddress-251) [ 21.580342] ACPI Warning: 0x0000000000000828-0x000000000000082f SystemIO conflicts with Region \GLBC 2 (20120320/utaddress-251) [ 21.580345] ACPI Warning: 0x0000000000000828-0x000000000000082f SystemIO conflicts with Region \SACT 3 (20120320/utaddress-251) [ 21.580348] ACPI Warning: 0x0000000000000828-0x000000000000082f SystemIO conflicts with Region \SSTS 4 (20120320/utaddress-251) [ 21.580352] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver [ 21.580355] ACPI Warning: 0x0000000000000880-0x00000000000008bf SystemIO conflicts with Region \GIC2 1 (20120320/utaddress-251) [ 21.580358] ACPI Warning: 0x0000000000000880-0x00000000000008bf SystemIO conflicts with Region \GIU3 2 (20120320/utaddress-251) [ 21.580361] ACPI Warning: 0x0000000000000880-0x00000000000008bf SystemIO conflicts with Region \GIC1 3 (20120320/utaddress-251) [ 21.580365] ACPI Warning: 0x0000000000000880-0x00000000000008bf SystemIO conflicts with Region \GHI5 4 (20120320/utaddress-251) [ 21.580368] ACPI Warning: 0x0000000000000880-0x00000000000008bf SystemIO conflicts with Region \GHI0 5 (20120320/utaddress-251) [ 21.580371] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver [ 21.580372] lpc_ich: Resource conflict(s) found affecting gpio_ich [ 21.677613] parport_pc 00:07: reported by Plug and Play ACPI [ 21.677668] parport0: PC-style at 0x378 (0x778), irq 7, using FIFO [PCSPP,TRISTATE,COMPAT,ECP] [ 21.681697] nvidia: module license 'NVIDIA' taints kernel. [ 21.681702] Disabling lock debugging due to kernel taint [ 21.723816] vgaarb: device changed decodes: PCI:0000:01:00.0,olddecodes=io+mem,decodes=none:owns=io+mem [ 21.724636] NVRM: loading NVIDIA UNIX x86_64 Kernel Module 304.88 Wed Mar 27 14:26:46 PDT 2013 [ 21.739461] microcode: CPU0 sig=0x6f6, pf=0x1, revision=0xc6 [ 21.778922] type=1400 audit(1366373496.018:2): apparmor="STATUS" operation="profile_load" name="/sbin/dhclient" pid=746 comm="apparmor_parser" [ 21.779298] type=1400 audit(1366373496.018:3): apparmor="STATUS" operation="profile_load" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=746 comm="apparmor_parser" [ 21.779514] type=1400 audit(1366373496.018:4): apparmor="STATUS" operation="profile_load" name="/usr/lib/connman/scripts/dhclient-script" pid=746 comm="apparmor_parser" [ 21.780472] lp0: using parport0 (interrupt-driven). [ 21.782212] type=1400 audit(1366373496.022:5): apparmor="STATUS" operation="profile_load" name="/usr/sbin/ntpd" pid=800 comm="apparmor_parser" [ 21.828832] dcdbas dcdbas: Dell Systems Management Base Driver (version 5.6.0-3.2) [ 21.886233] tg3 0000:03:00.0: irq 43 for MSI/MSI-X [ 21.924074] ppdev: user-space parallel port driver [ 21.940290] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [ 21.966272] microcode: CPU1 sig=0x6f6, pf=0x1, revision=0xc6 [ 21.968224] microcode: Microcode Update Driver: v2.00 <tigran@aivazian.fsnet.co.uk>, Peter Oruba [ 21.991007] kvm: disabled by bios [ 22.061849] coretemp coretemp.0: Using relative temperature scale! [ 22.061865] coretemp coretemp.0: Using relative temperature scale! [ 22.097596] init: statd-mounting (/home) main process (495) killed by TERM signal [ 22.097785] init: statd-mounting (/eda) main process (505) killed by TERM signal [ 22.097929] init: statd-mounting (/proj) main process (511) killed by TERM signal [ 22.140505] kvm: disabled by bios [ 23.369706] init: udev-fallback-graphics main process (958) terminated with status 1 [ 23.452388] type=1400 audit(1366373497.694:6): apparmor="DENIED" operation="open" parent=1 profile="/usr/sbin/ntpd" name="/etc/ldap/ldap.conf" pid=1044 comm="ntpd" requested_mask="r" denied_mask="r" fsuid=0 ouid=0 [ 23.488034] Bluetooth: Core ver 2.16 [ 23.488052] NET: Registered protocol family 31 [ 23.488054] Bluetooth: HCI device and connection manager initialized [ 23.488056] Bluetooth: HCI socket layer initialized [ 23.488057] Bluetooth: L2CAP socket layer initialized [ 23.488062] Bluetooth: SCO socket layer initialized [ 23.492643] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 23.492646] Bluetooth: BNEP filters: protocol multicast [ 23.494524] Bluetooth: RFCOMM TTY layer initialized [ 23.494530] Bluetooth: RFCOMM socket layer initialized [ 23.494531] Bluetooth: RFCOMM ver 1.11 [ 26.335935] tg3 0000:03:00.0: eth0: Link is up at 1000 Mbps, full duplex [ 26.335940] tg3 0000:03:00.0: eth0: Flow control is on for TX and on for RX [ 26.336169] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 30.192632] init: failsafe main process (886) killed by TERM signal [ 30.319983] type=1400 audit(1366373504.558:7): apparmor="STATUS" operation="profile_replace" name="/sbin/dhclient" pid=1332 comm="apparmor_parser" [ 30.320471] type=1400 audit(1366373504.562:: apparmor="STATUS" operation="profile_replace" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=1332 comm="apparmor_parser" [ 30.320690] type=1400 audit(1366373504.562:9): apparmor="STATUS" operation="profile_replace" name="/usr/lib/connman/scripts/dhclient-script" pid=1332 comm="apparmor_parser" [ 30.325389] type=1400 audit(1366373504.566:10): apparmor="STATUS" operation="profile_load" name="/usr/lib/telepathy/mission-control-5" pid=1335 comm="apparmor_parser" [ 30.325934] type=1400 audit(1366373504.566:11): apparmor="STATUS" operation="profile_load" name="/usr/lib/telepathy/telepathy-*" pid=1335 comm="apparmor_parser" [ 30.326109] type=1400 audit(1366373504.566:12): apparmor="STATUS" operation="profile_load" name="/usr/bin/evince" pid=1333 comm="apparmor_parser" [ 30.326660] type=1400 audit(1366373504.566:13): apparmor="STATUS" operation="profile_load" name="/usr/lib/telepathy/telepathy-*//sanitized_helper" pid=1335 comm="apparmor_parser" [ 30.330284] type=1400 audit(1366373504.570:14): apparmor="STATUS" operation="profile_load" name="/usr/lib/cups/backend/cups-pdf" pid=1336 comm="apparmor_parser" [ 30.330472] type=1400 audit(1366373504.570:15): apparmor="STATUS" operation="profile_load" name="/usr/bin/evince//sanitized_helper" pid=1333 comm="apparmor_parser" [ 30.330754] type=1400 audit(1366373504.570:16): apparmor="STATUS" operation="profile_load" name="/usr/sbin/cupsd" pid=1336 comm="apparmor_parser" [ 30.361923] ttyS4: LSR safety check engaged! [ 30.362459] ttyS4: LSR safety check engaged! [ 30.514324] init: gdm main process (1465) killed by TERM signal [ 33.575714] vboxdrv: Found 2 processor cores. [ 33.575884] vboxdrv: fAsync=0 offMin=0x507 offMax=0xbd9 [ 33.575947] vboxdrv: TSC mode is 'synchronous', kernel timer mode is 'normal'. [ 33.575949] vboxdrv: Successfully loaded version 4.1.18_Ubuntu (interface 0x00190000). [ 33.587394] vboxpci: IOMMU not found (not registered) [ 100.388064] end_request: I/O error, dev fd0, sector 0 [ 100.414701] end_request: I/O error, dev fd0, sector 0

I think the bootloader has collapsed.Is there anyway that I can fix it?

linux.and I have check via lsusb.there is no connection when I connect the line.

the serial port can't be found for the master-brick.I am sure that I erase the program in correct way. is there any way if I can download the bootloader for the master?