All L3+ miners stop mining after an hour or so

All of our L3+ miners suddenly stopped mining, they were all working until a week or so back. Now they stop mining from 30 minutes to 2 hours later, red fault light is blinking. 

would like to attach full kernal.log however, here is top of file

[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Linux version 3.8.13 (xxl@armdev01) (gcc version 4.7.4 20130626 (prerelease) (Linaro GCC 4.7-2013.07) ) #22 SMP Tue Dec 2 15:26:11 CST 2014
[ 0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=50c5387d
[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[ 0.000000] Machine: Generic AM33XX (Flattened Device Tree), model: TI AM335x BeagleBone
[ 0.000000] Memory policy: ECC disabled, Data cache writeback
[ 0.000000] On node 0 totalpages: 65280
[ 0.000000] free_area_init_node: node 0, pgdat c06cb100, node_mem_map c0726000
[ 0.000000] Normal zone: 512 pages used for memmap
[ 0.000000] Normal zone: 0 pages reserved
[ 0.000000] Normal zone: 64768 pages, LIFO batch:15
[ 0.000000] AM335X ES1.0 (neon )
[ 0.000000] PERCPU: Embedded 8 pages/cpu @c0933000 s9408 r8192 d15168 u32768
[ 0.000000] pcpu-alloc: s9408 r8192 d15168 u32768 alloc=8*4096
[ 0.000000] pcpu-alloc: [0] 0
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 64768
[ 0.000000] Kernel command line: console=ttyO0,115200n8 init=/sbin/init
[ 0.000000] PID hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.000000] Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
[ 0.000000] Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
[ 0.000000] __ex_table already sorted, skipping sort
[ 0.000000] allocated 524288 bytes of page_cgroup
[ 0.000000] please try 'cgroup_disable=memory' option if you don't want memory cgroups
[ 0.000000] Memory: 255MB = 255MB total
[ 0.000000] Memory: 230784k/230784k available, 31360k reserved, 0K highmem
[ 0.000000] Virtual kernel memory layout:
[ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB)
[ 0.000000] fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB)
[ 0.000000] vmalloc : 0xd0800000 - 0xff000000 ( 744 MB)
[ 0.000000] lowmem : 0xc0000000 - 0xd0000000 ( 256 MB)
[ 0.000000] pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB)
[ 0.000000] modules : 0xbf800000 - 0xbfe00000 ( 6 MB)
[ 0.000000] .text : 0xc0008000 - 0xc0612cf0 (6188 kB)
[ 0.000000] .init : 0xc0613000 - 0xc06554c0 ( 266 kB)
[ 0.000000] .data : 0xc0656000 - 0xc06cc020 ( 473 kB)
[ 0.000000] .bss : 0xc06cc020 - 0xc0725e3c ( 360 kB)
[ 0.000000] Hierarchical RCU implementation.
[ 0.000000] RCU restricting CPUs from NR_CPUS=4 to nr_cpu_ids=1.
[ 0.000000] NR_IRQS:16 nr_irqs:16 16
[ 0.000000] IRQ: Found an INTC at 0xfa200000 (revision 5.0) with 128 interrupts
[ 0.000000] Total of 128 interrupts on 1 active controller
[ 0.000000] OMAP clockevent source: GPTIMER1 at 24000000 Hz
[ 0.000000] sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 178956ms
[ 0.000000] OMAP clocksource: GPTIMER2 at 24000000 Hz
[ 0.000000] Console: colour dummy device 80x30
[ 0.000354] Calibrating delay loop... 545.07 BogoMIPS (lpj=531968)
[ 0.015441] pid_max: default: 32768 minimum: 301
[ 0.015671] Security Framework initialized
[ 0.015767] Mount-cache hash table entries: 512
[ 0.024608] Initializing cgroup subsys cpuacct
[ 0.024638] Initializing cgroup subsys memory
[ 0.024700] Initializing cgroup subsys blkio
[ 0.024836] CPU: Testing write buffer coherency: ok
[ 0.025411] CPU0: thread -1, cpu 0, socket -1, mpidr 0
[ 0.025490] Setting up static identity map for 0x8038c820 - 0x8038c86c
[ 0.026820] Brought up 1 CPUs
[ 0.026843] SMP: Total of 1 processors activated (545.07 BogoMIPS).
[ 0.028132] devtmpfs: initialized
[ 0.092531] pinctrl core: initialized pinctrl subsystem
[ 0.092748] rstctl core: initialized rstctl subsystem
[ 0.093243] regulator-dummy: no parameters
[ 0.093814] NET: Registered protocol family 16
[ 0.094521] DMA: preallocated 256 KiB pool for atomic coherent allocations
[ 0.104192] pinctrl-single 44e10800.pinmux: prop pinctrl-0 index 0 invalid phandle
[ 0.104374] pinctrl-single 44e10800.pinmux: 142 pins at pa f9e10800 size 568
[ 0.105468] platform 49000000.edma: alias fck already exists
[ 0.105503] platform 49000000.edma: alias fck already exists
[ 0.105531] platform 49000000.edma: alias fck already exists
[ 0.106677] gpiochip_add: registered GPIOs 0 to 31 on device: gpio
[ 0.106861] OMAP GPIO hardware version 0.1
[ 0.108273] gpiochip_add: registered GPIOs 32 to 63 on device: gpio
[ 0.109594] gpiochip_add: registered GPIOs 64 to 95 on device: gpio
[ 0.110914] gpiochip_add: registered GPIOs 96 to 127 on device: gpio
[ 0.111550] of_get_named_gpio_flags exited with status 52
[ 0.111581] gpio-rctrl rstctl.3: loaded OK
[ 0.116689] omap-gpmc 50000000.gpmc: GPMC revision 6.0
[ 0.119895] hw-breakpoint: debug architecture 0x4 unsupported.
[ 0.122082] cpsw.0: No hwaddr in dt. Using c4:f3:12:ee:c9:ac from efuse
[ 0.122115] cpsw.1: No hwaddr in dt. Using c4:f3:12:ee:c9:ae from efuse
[ 0.137651] bio: create slab <bio-0> at 0
[ 0.149786] edma-dma-engine edma-dma-engine.0: TI EDMA DMA engine driver
[ 0.150028] of_get_named_gpio_flags: can't parse gpios property
[ 0.150324] vmmcsd_fixed: 3300 mV
[ 0.153434] SCSI subsystem initialized
[ 0.153888] usbcore: registered new interface driver usbfs
[ 0.154003] usbcore: registered new interface driver hub
[ 0.154337] usbcore: registered new device driver usb
[ 0.156447] omap_i2c 4819c000.i2c: bus 0 rev0.11 at 100 kHz
[ 0.156481] omap_i2c 4819c000.i2c: unable to select pin group
[ 0.156674] media: Linux media interface: v0.10
[ 0.156769] Linux video capture interface: v2.00
[ 0.156887] pps_core: LinuxPPS API ver. 1 registered
[ 0.156903] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[ 0.157617] Advanced Linux Sound Architecture Driver Initialized.
[ 0.158799] Switching to clocksource gp_timer
[ 0.176752] NET: Registered protocol family 2
[ 0.177746] TCP established hash table entries: 2048 (order: 2, 16384 bytes)
[ 0.177835] TCP bind hash table entries: 2048 (order: 3, 40960 bytes)
[ 0.177925] TCP: Hash tables configured (established 2048 bind 2048)
[ 0.178017] TCP: reno registered
[ 0.178043] UDP hash table entries: 256 (order: 1, 12288 bytes)
[ 0.178090] UDP-Lite hash table entries: 256 (order: 1, 12288 bytes)
[ 0.178583] NET: Registered protocol family 1
[ 0.179175] RPC: Registered named UNIX socket transport module.
[ 0.179195] RPC: Registered udp transport module.
[ 0.179209] RPC: Registered tcp transport module.
[ 0.179223] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 0.179607] Trying to unpack rootfs image as initramfs...
[ 2.040652] Freeing initrd memory: 20132K
[ 2.041349] CPU PMU: probing PMU on CPU 0
[ 2.041382] hw perfevents: enabled with ARMv7 Cortex-A8 PMU driver, 5 counters available
[ 2.042015] omap2_mbox_probe: platform not supported
[ 2.045866] VFS: Disk quotas dquot_6.5.2
[ 2.046104] Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[ 2.047425] NFS: Registering the id_resolver key type
[ 2.047519] Key type id_resolver registered
[ 2.047605] Key type id_legacy registered
[ 2.047677] jffs2: version 2.2. (NAND) (SUMMARY) © 2001-2006 Red Hat, Inc.
[ 2.048123] msgmni has been set to 490
[ 2.050887] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 249)
[ 2.050915] io scheduler noop registered
[ 2.050931] io scheduler deadline registered
[ 2.050988] io scheduler cfq registered (default)
[ 2.054863] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[ 2.057244] omap_uart 44e09000.serial: did not get pins for uart0 error: -19
[ 2.057601] 44e09000.serial: ttyO0 at MMIO 0x44e09000 (irq = 88) is a OMAP UART0
[ 2.719024] console [ttyO0] enabled
[ 2.723742] 48022000.serial: ttyO1 at MMIO 0x48022000 (irq = 89) is a OMAP UART1
[ 2.732435] 48024000.serial: ttyO2 at MMIO 0x48024000 (irq = 90) is a OMAP UART2
[ 2.741172] 481a8000.serial: ttyO4 at MMIO 0x481a8000 (irq = 61) is a OMAP UART4
[ 2.749785] 481aa000.serial: ttyO5 at MMIO 0x481aa000 (irq = 62) is a OMAP UART5
[ 2.758848] [drm] Initialized drm 1.1.0 20060810
[ 2.777461] brd: module loaded
[ 2.787703] loop: module loaded
[ 2.791934] bone-capemgr bone_capemgr.8: Failed to find baseboard eeprom node
[ 2.801907] nand_get_flash_type: 2c,da against 2c,da
[ 2.807437] ONFI param page 0 valid
[ 2.811105] ONFI flash detected
[ 2.814423] NAND device: Manufacturer ID: 0x2c, Chip ID: 0xda (Micron MT29F2G08ABAEAWP), 256MiB, page size: 2048, OOB size: 64
[ 2.826333] omap2-nand: detected x8 NAND flash
[ 2.830998] nand: using OMAP_ECC_BCH8_CODE_HW ECC scheme
[ 2.836577] omap2-nand: using custom ecc layout
[ 2.841412] 10 ofpart partitions found on MTD device omap2-nand.0
[ 2.847804] Creating 10 MTD partitions on "omap2-nand.0":
[ 2.853476] 0x000000000000-0x000000020000 : "spl"
[ 2.860284] 0x000000020000-0x000000040000 : "spl_backup1"
[ 2.867671] 0x000000040000-0x000000060000 : "spl_backup2"
[ 2.875078] 0x000000060000-0x000000080000 : "spl_backup3"
[ 2.882503] 0x000000080000-0x000000240000 : "u-boot"
[ 2.890718] 0x000000240000-0x000000260000 : "bootenv"
[ 2.897636] 0x000000260000-0x000000280000 : "fdt"
[ 2.904250] 0x000000280000-0x000000780000 : "kernel"
[ 2.915259] 0x000000800000-0x000001c00000 : "root"
[ 2.938795] 0x000001c00000-0x000003000000 : "config"
[ 2.962581] OneNAND driver initializing
[ 2.968306] usbcore: registered new interface driver asix
[ 2.974112] usbcore: registered new interface driver cdc_ether
[ 2.980350] usbcore: registered new interface driver smsc95xx
[ 2.986460] usbcore: registered new interface driver net1080
[ 2.992479] usbcore: registered new interface driver cdc_subset
[ 2.998793] usbcore: registered new interface driver zaurus
[ 3.005074] usbcore: registered new interface driver cdc_ncm
[ 3.011846] usbcore: registered new interface driver cdc_acm
[ 3.017807] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
[ 3.026186] Initializing USB Mass Storage driver...
[ 3.031421] usbcore: registered new interface driver usb-storage
[ 3.037719] USB Mass Storage support registered.
[ 3.042761] musb-hdrc: version 6.0, ?dma?, otg (peripheral+host)
[ 3.049470] musb-hdrc musb-hdrc.0.auto: pdev->id = 0
[ 3.054707] musb-hdrc musb-hdrc.0.auto: drivers/usb/musb/musb_dsps.c:468 dsps_musb_init: OK
[ 3.063473] musb-hdrc: ConfigData=0xde (UTMI-8, dyn FIFOs, bulk combine, bulk split, HB-ISO Rx, HB-ISO Tx, SoftConn)
[ 3.063494] musb-hdrc: MHDRC RTL version 2.0
[ 3.063509] musb-hdrc: setup fifo_mode 4
[ 3.063536] musb-hdrc: 28/31 max ep, 16384/16384 memory
[ 3.063682] musb-hdrc musb-hdrc.0.auto: *** mode=3
[ 3.068723] musb-hdrc musb-hdrc.0.auto: *** power=250
[ 3.074746] musb-hdrc musb-hdrc.1.auto: pdev->id = 1
[ 3.079995] musb-hdrc musb-hdrc.1.auto: drivers/usb/musb/musb_dsps.c:468 dsps_musb_init: OK
[ 3.088761] musb-hdrc: ConfigData=0xde (UTMI-8, dyn FIFOs, bulk combine, bulk split, HB-ISO Rx, HB-ISO Tx, SoftConn)
[ 3.088781] musb-hdrc: MHDRC RTL version 2.0
[ 3.088795] musb-hdrc: setup fifo_mode 4
[ 3.088817] musb-hdrc: 28/31 max ep, 16384/16384 memory
[ 3.088957] musb-hdrc musb-hdrc.1.auto: *** mode=1
[ 3.093998] musb-hdrc musb-hdrc.1.auto: *** power=250
[ 3.099305] musb-hdrc musb-hdrc.1.auto: MUSB HDRC host driver
[ 3.105668] musb-hdrc musb-hdrc.1.auto: new USB bus registered, assigned bus number 1
[ 3.113904] musb-hdrc musb-hdrc.1.auto: supports USB remote wakeup
[ 3.114040] usb usb1: default language 0x0409
[ 3.114099] usb usb1: udev 1, busnum 1, minor = 0
[ 3.114123] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[ 3.121247] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 3.128817] usb usb1: Product: MUSB HDRC host driver
[ 3.134031] usb usb1: Manufacturer: Linux 3.8.13 musb-hcd
[ 3.139696] usb usb1: SerialNumber: musb-hdrc.1.auto
[ 3.145732] usb usb1: usb_probe_device
[ 3.145760] usb usb1: configuration #1 chosen from 1 choice
[ 3.145826] usb usb1: adding 1-0:1.0 (config #1, interface 0)
[ 3.146027] hub 1-0:1.0: usb_probe_interface
[ 3.146050] hub 1-0:1.0: usb_probe_interface - got id
[ 3.146077] hub 1-0:1.0: USB hub found
[ 3.150105] hub 1-0:1.0: 1 port detected
[ 3.154244] hub 1-0:1.0: standalone hub
[ 3.154265] hub 1-0:1.0: individual port power switching
[ 3.154283] hub 1-0:1.0: no over-current protection
[ 3.154301] hub 1-0:1.0: Single TT
[ 3.154322] hub 1-0:1.0: TT requires at most 8 FS bit times (666 ns)
[ 3.154342] hub 1-0:1.0: power on to power good time: 10ms
[ 3.154398] hub 1-0:1.0: local power source is good
[ 3.154514] hub 1-0:1.0: enabling power on all ports
[ 3.155607] mousedev: PS/2 mouse device common for all mice
[ 3.163617] omap_rtc 44e3e000.rtc: rtc core: registered 44e3e000.rtc as rtc0
[ 3.171384] i2c /dev entries driver
[ 3.176377] pps_ldisc: PPS line discipline registered
[ 3.181853] Driver for 1-wire Dallas network protocol.
[ 3.189135] omap_wdt: OMAP Watchdog Timer Rev 0x01: initial timeout 60 sec
[ 3.196693] cpuidle: using governor ladder
[ 3.201015] cpuidle: using governor menu
[ 3.205570] of_get_named_gpio_flags exited with status 6
[ 3.205590] of_get_named_gpio_flags: can't parse gpios property
[ 3.205606] of_get_named_gpio_flags: can't parse gpios property
[ 3.205643] omap_hsmmc mmc.4: of_parse_phandle_with_args of 'reset' failed
[ 3.212884] omap_hsmmc mmc.4: Failed to get rstctl; not using any
[ 3.219730] edma-dma-engine edma-dma-engine.0: allocated channel for 0:25
[ 3.226939] edma-dma-engine edma-dma-engine.0: allocated channel for 0:24
[ 3.234275] mmc.4 supply vmmc_aux not found, using dummy regulator
[ 3.241247] omap_hsmmc mmc.4: pins are not configured from the driver
[ 3.254745] hub 1-0:1.0: state 7 ports 1 chg 0000 evt 0000
[ 3.274847] of_get_named_gpio_flags exited with status -517
[ 3.274915] platform gpio-leds.7: Driver leds-gpio requests probe deferral
[ 3.282555] ledtrig-cpu: registered to indicate activity on CPUs
[ 3.289329] edma-dma-engine edma-dma-engine.0: allocated channel for 0:36
[ 3.296519] omap-sham 53100000.sham: hw accel on OMAP rev 4.3
[ 3.304626] omap-aes 53500000.aes: OMAP AES hw accel rev: 3.2
[ 3.310982] edma-dma-engine edma-dma-engine.0: allocated channel for 0:5
[ 3.318174] edma-dma-engine edma-dma-engine.0: allocated channel for 0:6
[ 3.330426] usbcore: registered new interface driver usbhid
[ 3.336352] usbhid: USB HID core driver
[ 3.343250] TCP: cubic registered
[ 3.346775] Initializing XFRM netlink socket
[ 3.351353] NET: Registered protocol family 17
[ 3.356232] NET: Registered protocol family 15
[ 3.361089] Key type dns_resolver registered
[ 3.365729] VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 3
[ 3.373807] ThumbEE CPU extension supported.
[ 3.378317] Registering SWP/SWPB emulation handler
[ 3.384339] registered taskstats version 1
[ 3.390954] of_get_named_gpio_flags exited with status -517
[ 3.391027] platform gpio-leds.7: Driver leds-gpio requests probe deferral
[ 3.448020] davinci_mdio 4a101000.mdio: davinci mdio revision 1.6
[ 3.454433] davinci_mdio 4a101000.mdio: detected phy mask fffffffe
[ 3.468909] libphy: 4a101000.mdio: probed
[ 3.473221] davinci_mdio 4a101000.mdio: phy[0]: device 4a101000.mdio:00, driver SMSC LAN8710/LAN8720
[ 3.483459] Detected MACID = c4:f3:12:ee:c9:ac
[ 3.488142] cpsw 4a100000.ethernet: NAPI disabled
[ 3.493523] of_get_named_gpio_flags exited with status -517
[ 3.493588] platform gpio-leds.7: Driver leds-gpio requests probe deferral
[ 3.502300] omap_rtc 44e3e000.rtc: setting system clock to 2000-01-01 00:00:00 UTC (946684800)
[ 3.511568] cpu0 supply cpu0 not found, using dummy regulator
[ 3.518084] cpufreq_cpu0: failed to scale voltage up: -22
[ 3.523902] cpufreq_cpu0: failed to scale voltage up: -22
[ 3.536682] ALSA device list:
[ 3.539914] No soundcards found.
[ 3.544509] Freeing init memory: 264K
[ 3.548561] Failed to execute /init
[ 4.540697] jffs2: notice: (122) jffs2_build_xattr_subsystem: complete building xattr subsystem, 0 of xdatum (0 unchecked, 0 orphan) and 0 of xref (0 dead, 0 orphan) found.
[ 6.252936] net eth0: initializing cpsw version 1.12 (0)
[ 6.263037] net eth0: phy found : id is : 0x7c0f1
[ 6.268506] libphy: PHY 4a101000.mdio:01 not found
[ 6.273698] net eth0: phy 4a101000.mdio:01 not found on slave 1
[ 9.341111] libphy: 4a101000.mdio:00 - Link is Up - 100/Full
Dec 3 20:08:35 (none) local0.err cgminer[15493]: Net Err! lastest job more than 2 mins! waiting ...
Dec 3 20:08:36 (none) local0.err cgminer[15493]: Net Err! lastest job more than 2 mins! waiting ...
Dec 3 20:08:37 (none) local0.err cgminer[15493]: Net Err! lastest job more than 2 mins! waiting ...
Dec 3 20:08:38 (none) local0.err cgminer[15493]: Net Err! lastest job more than 2 mins! waiting ...
Dec 3 20:08:39 (none) local0.err cgminer[15493]: Net Err! lastest job more than 2 mins! waiting ...