# \[SOLVED\] Can't boot the PYNQ-Z2 - red LED **URL:** \ **Category:** Support\ **Created:** [July 17, 2020, 9:27pm UTC](https://discuss.pynq.io/t/solved-cant-boot-the-pynq-z2-red-led/1519 "2020-07-17T21:27:22Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Scout](https://avatars.discourse-cdn.com/v4/letter/s/fbc32d/32.png) [@Scout](https://discuss.pynq.io/u/Scout)\ **Post date:** [July 17, 2020, 9:27pm UTC](https://discuss.pynq.io/t/solved-cant-boot-the-pynq-z2-red-led/1519/1 "2020-07-17T21:27:22Z")
Hello there, I followed the tutorial from [PYNQ-Z2 Setup Guide — Python productivity for Zynq (Pynq)](https://pynq.readthedocs.io/en/latest/getting_started/pynq_z2_setup.html) and I checked with 2 SD cards. I see only one CR8 red LED - there is no blue, yellow or green LED’s. How I can check if the board that I bought is damaged? ---
**Author:** ![Scout](https://avatars.discourse-cdn.com/v4/letter/s/fbc32d/32.png) [@Scout](https://discuss.pynq.io/u/Scout)\ **Post date:** [July 17, 2020, 9:42pm UTC](https://discuss.pynq.io/t/solved-cant-boot-the-pynq-z2-red-led/1519/2 "2020-07-17T21:42:31Z")
This is the log from boot: > Device: mmc@e0100000 > Manufacturer ID: 1b > OEM: 534d > Name: 00000 > Bus Speed: 50000000 > Mode : SD High Speed (50MHz) > Rd Block Len: 512 > SD version 3.0 > High Capacity: Yes > Capacity: 58.6 GiB > Bus Width: 4-bit > Erase Group Size: 512 Bytes > 4771268 bytes read in 275 ms (16.5 MiB/s) ## Loading kernel from FIT Image at 10000000 … Using ‘conf@1’ configuration Verifying Hash Integrity … OK Trying ‘kernel@0’ kernel subimage Description: Linux Kernel Type: Kernel Image Compression: uncompressed Data Start: 0x100000d4 Data Size: 4752880 Bytes = 4.5 MiB Architecture: ARM OS: Linux Load Address: 0x00080000 Entry Point: 0x00080000 Hash algo: sha1 Hash value: f0d022f59e1266bfc5bb33d36a03c8f9d3210c1f Verifying Hash Integrity … sha1+ OK ## Loading fdt from FIT Image at 10000000 … Using ‘conf@1’ configuration Verifying Hash Integrity … OK Trying ‘fdt@0’ fdt subimage Description: Flattened Device Tree blob Type: Flat Device Tree Compression: uncompressed Data Start: 0x104887b8 Data Size: 17093 Bytes = 16.7 KiB Architecture: ARM Hash algo: sha1 Hash value: 8899d6d25301f1e831133eac3ff0fc67091de697 Verifying Hash Integrity … sha1+ OK Booting using the fdt blob at 0x104887b8 Loading Kernel Image … OK Loading Device Tree to 07ff8000, end 07fff2c4 … OK Starting kernel … Booting Linux on physical CPU 0x0 Linux version 4.19.0-xilinx-v2019.1 (oe-user@oe-host) (gcc version 8.2.0 (GCC)) #1 SMP PREEMPT Thu Oct 3 17:13:49 UTC 2019 CPU: ARMv7 Processor [413fc090] revision 0 (ARMv7), cr=18c5387d CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache OF: fdt: Machine model: xlnx,zynq-7000 bootconsole [earlycon0] enabled Memory policy: Data cache writealloc cma: Reserved 128 MiB at 0x18000000 random: get\_random\_bytes called from start\_kernel+0x80/0x3e4 with crng\_init=0 percpu: Embedded 16 pages/cpu @(ptrval) s35980 r8192 d21364 u65536 Built 1 zonelists, mobility grouping on. Total pages: 129920 Kernel command line: root=/dev/mmcblk0p2 rw earlyprintk rootfstype=ext4 rootwait devtmpfs.mount=1 uio\_pdrv\_genirq.of\_id=“generic-uio” clk\_ignore\_unused Dentry cache hash table entries: 65536 (order: 6, 262144 bytes) Inode-cache hash table entries: 32768 (order: 5, 131072 bytes) Memory: 376512K/524288K available (7168K kernel code, 230K rwdata, 1800K rodata, 1024K init, 258K bss, 16704K reserved, 131072K cma-reserved, 0K highmem) Virtual kernel memory layout: vector : 0xffff0000 - 0xffff1000 ( 4 kB) fixmap : 0xffc00000 - 0xfff00000 (3072 kB) vmalloc : 0xe0800000 - 0xff800000 ( 496 MB) lowmem : 0xc0000000 - 0xe0000000 ( 512 MB) pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB) modules : 0xbf000000 - 0xbfe00000 ( 14 MB) .text : 0x(ptrval) - 0x(ptrval) (8160 kB) .init : 0x(ptrval) - 0x(ptrval) (1024 kB) .data : 0x(ptrval) - 0x(ptrval) ( 230 kB) .bss : 0x(ptrval) - 0x(ptrval) ( 259 kB) rcu: Preemptible hierarchical RCU implementation. rcu: RCU restricting CPUs from NR\_CPUS=4 to nr\_cpu\_ids=2. Tasks RCU enabled. rcu: Adjusting geometry for rcu\_fanout\_leaf=16, nr\_cpu\_ids=2 NR\_IRQS: 16, nr\_irqs: 16, preallocated irqs: 16 efuse mapped to (ptrval) slcr mapped to (ptrval) L2C: platform modifies aux control register: 0x72360000 → 0x72760000 L2C: DT/platform modifies aux control register: 0x72360000 → 0x72760000 L2C-310 erratum 769419 enabled L2C-310 enabling early BRESP for Cortex-A9 L2C-310 full line of zeros enabled for Cortex-A9 L2C-310 ID prefetch enabled, offset 1 lines L2C-310 dynamic clock gating enabled, standby mode enabled L2C-310 cache controller enabled, 8 ways, 512 kB L2C-310: CACHE\_ID 0x410000c8, AUX\_CTRL 0x76760001 zynq\_clock\_init: clkc starts at (ptrval) Zynq clock init sched\_clock: 64 bits at 325MHz, resolution 3ns, wraps every 4398046511103ns clocksource: arm\_global\_timer: mask: 0xffffffffffffffff max\_cycles: 0x4af477f6aa , max\_idle\_ns: 440795207830 ns Switching to timer-based delay loop, resolution 3ns clocksource: ttc\_clocksource: mask: 0xffff max\_cycles: 0xffff, max\_idle\_ns: 5513 18127 ns timer #0 at (ptrval), irq=17 Console: colour dummy device 80x30 console [tty0] enabled bootconsole [earlycon0] disabled Booting Linux on physical CPU 0x0 Linux version 4.19.0-xilinx-v2019.1 (oe-user@oe-host) (gcc version 8.2.0 (GCC)) #1 SMP PREEMPT Thu Oct 3 17:13:49 UTC 2019 CPU: ARMv7 Processor [413fc090] revision 0 (ARMv7), cr=18c5387d CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache OF: fdt: Machine model: xlnx,zynq-7000 bootconsole [earlycon0] enabled Memory policy: Data cache writealloc cma: Reserved 128 MiB at 0x18000000 random: get\_random\_bytes called from start\_kernel+0x80/0x3e4 with crng\_init=0 percpu: Embedded 16 pages/cpu @(ptrval) s35980 r8192 d21364 u65536 Built 1 zonelists, mobility grouping on. Total pages: 129920 Kernel command line: root=/dev/mmcblk0p2 rw earlyprintk rootfstype=ext4 rootwait devtmpfs.mount=1 uio\_pdrv\_genirq.of\_id=“generic-uio” clk\_ignore\_unused Dentry cache hash table entries: 65536 (order: 6, 262144 bytes) Inode-cache hash table entries: 32768 (order: 5, 131072 bytes) Memory: 376512K/524288K available (7168K kernel code, 230K rwdata, 1800K rodata, 1024K init, 258K bss, 16704K reserved, 131072K cma-reserved, 0K highmem) Virtual kernel memory layout: vector : 0xffff0000 - 0xffff1000 ( 4 kB) fixmap : 0xffc00000 - 0xfff00000 (3072 kB) vmalloc : 0xe0800000 - 0xff800000 ( 496 MB) lowmem : 0xc0000000 - 0xe0000000 ( 512 MB) pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB) modules : 0xbf000000 - 0xbfe00000 ( 14 MB) .text : 0x(ptrval) - 0x(ptrval) (8160 kB) .init : 0x(ptrval) - 0x(ptrval) (1024 kB) .data : 0x(ptrval) - 0x(ptrval) ( 230 kB) .bss : 0x(ptrval) - 0x(ptrval) ( 259 kB) rcu: Preemptible hierarchical RCU implementation. rcu: RCU restricting CPUs from NR\_CPUS=4 to nr\_cpu\_ids=2. Tasks RCU enabled. rcu: Adjusting geometry for rcu\_fanout\_leaf=16, nr\_cpu\_ids=2 NR\_IRQS: 16, nr\_irqs: 16, preallocated irqs: 16 efuse mapped to (ptrval) slcr mapped to (ptrval) L2C: platform modifies aux control register: 0x72360000 → 0x72760000 L2C: DT/platform modifies aux control register: 0x72360000 → 0x72760000 L2C-310 erratum 769419 enabled L2C-310 enabling early BRESP for Cortex-A9 L2C-310 full line of zeros enabled for Cortex-A9 L2C-310 ID prefetch enabled, offset 1 lines L2C-310 dynamic clock gating enabled, standby mode enabled L2C-310 cache controller enabled, 8 ways, 512 kB L2C-310: CACHE\_ID 0x410000c8, AUX\_CTRL 0x76760001 zynq\_clock\_init: clkc starts at (ptrval) Zynq clock init sched\_clock: 64 bits at 325MHz, resolution 3ns, wraps every 4398046511103ns clocksource: arm\_global\_timer: mask: 0xffffffffffffffff max\_cycles: 0x4af477f6aa , max\_idle\_ns: 440795207830 ns Switching to timer-based delay loop, resolution 3ns clocksource: ttc\_clocksource: mask: 0xffff max\_cycles: 0xffff, max\_idle\_ns: 5513 18127 ns timer #0 at (ptrval), irq=17 Console: colour dummy device 80x30 console [tty0] enabled bootconsole [earlycon0] disabled Calibrating delay loop (skipped), value calculated using timer frequency.. 650.0 0 BogoMIPS (lpj=3250000) pid\_max: default: 32768 minimum: 301 Mount-cache hash table entries: 1024 (order: 0, 4096 bytes) Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes) CPU: Testing write buffer coherency: ok CPU0: Spectre v2: using BPIALL workaround CPU0: thread -1, cpu 0, socket 0, mpidr 80000000 Setting up static identity map for 0x100000 - 0x100060 rcu: Hierarchical SRCU implementation. smp: Bringing up secondary CPUs … CPU1: thread -1, cpu 1, socket 0, mpidr 80000001 CPU1: Spectre v2: using BPIALL workaround smp: Brought up 1 node, 2 CPUs SMP: Total of 2 processors activated (1300.00 BogoMIPS). CPU: All CPU(s) started in SVC mode. devtmpfs: initialized VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4 clocksource: jiffies: mask: 0xffffffff max\_cycles: 0xffffffff, max\_idle\_ns: 1911 2604462750000 ns futex hash table entries: 512 (order: 3, 32768 bytes) pinctrl core: initialized pinctrl subsystem NET: Registered protocol family 16 DMA: preallocated 256 KiB pool for atomic coherent allocations cpuidle: using governor menu hw-breakpoint: found 5 (+1 reserved) breakpoint and 1 watchpoint registers. hw-breakpoint: maximum watchpoint size is 4 bytes. zynq-ocm f800c000.ocmc: ZYNQ OCM pool: 256 KiB @ 0x(ptrval) zynq-pinctrl 700.pinctrl: zynq pinctrl initialized e0000000.serial: ttyPS0 at MMIO 0xe0000000 (irq = 27, base\_baud = 6250000) is a xuartps console [ttyPS0] enabled vgaarb: loaded SCSI subsystem initialized usbcore: registered new interface driver usbfs usbcore: registered new interface driver hub usbcore: registered new device driver usb media: Linux media interface: v0.10 videodev: Linux video capture interface: v2.00 pps\_core: LinuxPPS API ver. 1 registered pps\_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti \ PTP clock support registered EDAC MC: Ver: 3.0.0 FPGA manager framework Advanced Linux Sound Architecture Driver Initialized. clocksource: Switched to clocksource arm\_global\_timer NET: Registered protocol family 2 tcp\_listen\_portaddr\_hash hash table entries: 512 (order: 0, 6144 bytes) TCP established hash table entries: 4096 (order: 2, 16384 bytes) TCP bind hash table entries: 4096 (order: 3, 32768 bytes) TCP: Hash tables configured (established 4096 bind 4096) UDP hash table entries: 256 (order: 1, 8192 bytes) UDP-Lite hash table entries: 256 (order: 1, 8192 bytes) NET: Registered protocol family 1 RPC: Registered named UNIX socket transport module. RPC: Registered udp transport module. RPC: Registered tcp transport module. RPC: Registered tcp NFSv4.1 backchannel transport module. hw perfevents: no interrupt-affinity property for /pmu@f8891000, guessing. hw perfevents: enabled with armv7\_cortex\_a9 PMU driver, 7 counters available Initialise system trusted keyrings workingset: timestamp\_bits=14 max\_order=17 bucket\_order=3 jffs2: version 2.2. (NAND) (SUMMARY) © 2001-2006 Red Hat, Inc. Key type asymmetric registered Asymmetric key parser ‘x509’ registered io scheduler noop registered io scheduler deadline registered io scheduler cfq registered (default) io scheduler mq-deadline registered io scheduler kyber registered dma-pl330 f8003000.dmac: Loaded driver for PL330 DMAC-241330 dma-pl330 f8003000.dmac: DBUFF-128x8bytes Num\_Chans-8 Num\_Peri-4 Num\_Even ts-16 brd: module loaded loop: module loaded m25p80 spi0.0: found s25fl128s, expected n25q512a m25p80 spi0.0: s25fl128s (16384 Kbytes) 4 fixed-partitions partitions found on MTD device spi0.0 Creating 4 MTD partitions on “spi0.0”: 0x000000000000-0x000000500000 : “boot” 0x000000500000-0x000000520000 : “bootenv” 0x000000520000-0x000000fa0000 : “kernel” 0x000000fa0000-0x000001000000 : “spare” libphy: Fixed MDIO Bus: probed tun: Universal TUN/TAP device driver, 1.6 CAN device driver interface libphy: MACB\_mii\_bus: probed RTL8211E Gigabit Ethernet e000b000.ethernet-ffffffff:01: attached PHY driver [RT L8211E Gigabit Ethernet] (mii\_bus:phy\_addr=e000b000.ethernet-ffffffff:01, irq=PO LL) macb e000b000.ethernet eth0: Cadence GEM rev 0x00020118 at 0xe000b000 irq 29 (00 :05:6b:01:00:5b) e1000e: Intel(R) PRO/1000 Network Driver - 3.2.6-k e1000e: Copyright(c) 1999 - 2015 Intel Corporation. ehci\_hcd: USB 2.0 ‘Enhanced’ Host Controller (EHCI) Driver ehci-pci: EHCI PCI platform driver usbcore: registered new interface driver cdc\_acm cdc\_acm: USB Abstract Control Model driver for USB modems and ISDN adapters usbcore: registered new interface driver cdc\_wdm usbcore: registered new interface driver usb-storage usbcore: registered new interface driver usbserial\_generic usbserial: USB Serial support registered for generic usbcore: registered new interface driver usb\_serial\_simple usbserial: USB Serial support registered for carelink usbserial: USB Serial support registered for zio usbserial: USB Serial support registered for funsoft usbserial: USB Serial support registered for flashloader usbserial: USB Serial support registered for google usbserial: USB Serial support registered for libtransistor usbserial: USB Serial support registered for vivopay usbserial: USB Serial support registered for moto\_modem usbserial: USB Serial support registered for motorola\_tetra usbserial: USB Serial support registered for novatel\_gps usbserial: USB Serial support registered for hp4x usbserial: USB Serial support registered for suunto usbserial: USB Serial support registered for siemens\_mpi chipidea-usb2 e0002000.usb: e0002000.usb supply vbus not found, using dummy regulator chipidea-usb2 e0002000.usb: Linked as a consumer to regulator.0 ULPI transceiver vendor/product ID 0x0451/0x1507 Found TI TUSB1210 ULPI transceiver. ULPI integrity check: passed. ci\_hdrc ci\_hdrc.0: EHCI Host Controller ci\_hdrc ci\_hdrc.0: new USB bus registered, assigned bus number 1 ci\_hdrc ci\_hdrc.0: USB 2.0 started, EHCI 1.00 hub 1-0:1.0: USB hub found hub 1-0:1.0: 1 port detected i2c /dev entries driver cdns-i2c e0004000.i2c: 100 kHz mmio e0004000 irq 23 cdns-i2c e0005000.i2c: 100 kHz mmio e0005000 irq 24 cdns-wdt f8005000.watchdog: Xilinx Watchdog Timer at (ptrval) with timeout 10s EDAC MC: ECC not enabled Xilinx Zynq CpuIdle Driver started sdhci: Secure Digital Host Controller Interface driver sdhci: Copyright(c) Pierre Ossman sdhci-pltfm: SDHCI platform and OF driver helper mmc0: SDHCI controller on e0100000.mmc [e0100000.mmc] using ADMA ledtrig-cpu: registered to indicate activity on CPUs usbcore: registered new interface driver usbhid usbhid: USB HID core driver xlnk xlnk: Major 244 xlnk xlnk: xlnk driver loaded xlnk xlnk: xlnk\_pdev is not null fpga\_manager fpga0: Xilinx Zynq FPGA Manager registered NET: Registered protocol family 10 Segment Routing with IPv6 sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver NET: Registered protocol family 17 can: controller area network core (rev 20170425 abi 9) NET: Registered protocol family 29 can: raw protocol (rev 20170425) can: broadcast manager protocol (rev 20170425 t) can: netlink gateway (rev 20170425) max\_hops=1 Registering SWP/SWPB emulation handler Loading compiled-in X.509 certificates mmc0: new high speed SDXC card at address 0001 of-fpga-region fpga-full: FPGA Region probed mmcblk0: mmc0:0001 00000 58.6 GiB hctosys: unable to open rtc device (rtc0) of\_cfs\_init of\_cfs\_init: OK cfg80211: Loading compiled-in X.509 certificates for regulatory database mmcblk0: p1 p2 cfg80211: Loaded X.509 cert ‘sforshee: 00b28ddf47aef9cea7’ platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 clk: Not disabling unused clocks cfg80211: failed to load regulatory.db ALSA device list: No soundcards found. random: fast init done EXT4-fs (mmcblk0p2): recovery complete EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null) VFS: Mounted root (ext4 filesystem) on device 179:2. devtmpfs: mounted Freeing unused kernel memory: 1024K Run /sbin/init as init process systemd[1]: System time before build time, advancing clock. systemd[1]: Failed to insert module ‘autofs4’: No such file or directory systemd[1]: systemd 237 running in system mode. (+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD -IDN2 +IDN -PCRE2 default-hierarchy=hybrid) systemd[1]: Detected architecture arm. Welcome to PynqLinux, based on Ubuntu 18.04! systemd[1]: Set hostname to . random: systemd: uninitialized urandom read (16 bytes read) systemd[1]: Started Forward Password Requests to Wall Directory Watch. [OK] Started Forward Password Requests to Wall Directory Watch. random: systemd: uninitialized urandom read (16 bytes read) systemd[1]: Reached target System Time Synchronized. [OK] Reached target System Time Synchronized. random: systemd: uninitialized urandom read (16 bytes read) systemd[1]: Created slice User and Session Slice. [OK] Created slice User and Session Slice. systemd[1]: Started ntp-systemd-netif.path. [OK] Started ntp-systemd-netif.path. systemd[1]: Created slice System Slice. [OK] Created slice System Slice. systemd[1]: Created slice system-getty.slice. [OK] Created slice system-getty.slice. systemd[1]: Listening on /dev/initctl Compatibility Named Pipe. [OK] Listening on /dev/initctl Compatibility Named Pipe. [OK] Listening on Journal Socket. Starting Load Kernel Modules… Starting Create Static Device Nodes in /dev… [OK] Listening on udev Control Socket. [OK] Listening on udev Kernel Socket. Starting udev Coldplug all Devices… [OK] Listening on Syslog Socket. [OK] Created slice system-serial\x2dgetty.slice. [OK] Reached target Slices. Starting Nameserver information manager… Starting Restore / save the current clock… Mounting POSIX Message Queue File System… [OK] Reached target Remote File Systems. Starting Remount Root and Kernel File Systems… [OK] Listening on Journal Socket (/dev/log). Starting Journal Service… Mounting Kernel Debug File System… [OK] Started Dispatch Password Requests to Console Directory Watch. [OK] Reached target Local Encrypted Volumes. [OK] Started Journal Service. [OK] Started Load Kernel Modules. [OK] Started Create Static Device Nodes in /dev. [OK] Started Restore / save the current clock. [OK] Mounted POSIX Message Queue File System. [OK] Started Remount Root and Kernel File Systems. [OK] Mounted Kernel Debug File System. [OK] Started Nameserver information manager. [OK] Reached target Network (Pre). Activating swap /var/swap… Starting Load/Save Random Seed… [OK] Reached target Local File Systems (Pre). [OK] Reached target Local File Systems. Starting Enable support for additional executable binary formats… Starting udev Kernel Device Manager… Starting Apply Kernel Variables… Mounting Kernel Configuration File System… Starting Flush Journal to Persistent Storage… [OK] Started udev Coldplug all Devices. [OK] Started Load/Save Random Seed. [OK] Activated swap /var/swap. [OK] Started udev Kernel Device Manager. [OK] Started Enable support for additional executable binary formats. [OK] Started Apply Kernel Variables. [OK] Mounted Kernel Configuration File System. Starting Raise network interfaces… [OK] Reached target Swap. [OK] Found device /dev/ttyPS0. [OK] Started Flush Journal to Persistent Storage. Starting Create Volatile Files and Directories… [OK] Started Create Volatile Files and Directories. [OK] Started ifup for eth0. Starting Network Time Synchronization… Starting Network Name Resolution… [OK] Started Entropy daemon using the HAVEGE algorithm. Starting Update UTMP about System Boot/Shutdown… [OK] Started Update UTMP about System Boot/Shutdown. [OK] Started Network Time Synchronization. [OK] Reached target System Initialization. [OK] Started Discard unused blocks once a week. [OK] Started Message of the Day. [OK] Started resolvconf-pull-resolved.path. [OK] Reached target Paths. [OK] Listening on D-Bus System Message Bus Socket. [OK] Started Daily Cleanup of Temporary Directories. [OK] Started Daily apt download activities. [OK] Started Daily apt upgrade and clean activities. [OK] Reached target Timers. [OK] Listening on UUID daemon activation socket. [OK] Reached target Sockets. [OK] Reached target Basic System. Starting Jupyter Notebook Server… Starting System Logging Service… Starting Login Service… Starting LSB: automatic crash report generation… [OK] Started D-Bus System Message Bus. [OK] Started Login Service. [OK] Started ntp-systemd-netif.service. [OK] Started Regular background program processing daemon. [OK] Started Set the CPU Frequency Scaling governor. Starting LSB: Load kernel modules needed to enable cpufreq scaling… Starting Dispatcher daemon for systemd-networkd… Starting resolvconf-pull-resolved.service… Starting WPA supplicant… Starting Resize Filesystem on SD card… Starting PYNQ PL Server… [OK] Started Network Name Resolution. [OK] Started System Logging Service. [OK] Started Resize Filesystem on SD card. [OK] Started PYNQ PL Server. [OK] Started resolvconf-pull-resolved.service. [OK] Started WPA supplicant. [OK] Reached target Host and Network Name Lookups. [OK] Started LSB: automatic crash report generation. [OK] Started LSB: Load kernel modules needed to enable cpufreq scaling. Starting LSB: set CPUFreq kernel parameters… [OK] Started LSB: set CPUFreq kernel parameters. [OK] Started Dispatcher daemon for systemd-networkd. Stopping Network Name Resolution… [OK] Stopped Network Name Resolution. Starting Network Name Resolution… Starting resolvconf-pull-resolved.service… [OK] Started Network Name Resolution. [OK] Started resolvconf-pull-resolved.service. [OK] Started Raise network interfaces. [OK] Reached target Network. Starting Permit User Sessions… [OK] Started Unattended Upgrades Shutdown. Starting OpenBSD Secure Shell server… [OK] Reached target Network is Online. [OK] Started ISC DHCP IPv4 server. Starting Samba NMB Daemon… [OK] Started ISC DHCP IPv6 server. [OK] Started Permit User Sessions. [OK] Started Serial Getty on ttyPS0. [OK] Started Getty on tty1. [OK] Reached target Login Prompts. PYNQ Linux, based on Ubuntu 18.04 pynq ttyPS0 pynq login: xilinx (automatic login) Last login: Fri Jul 17 21:31:59 UTC 2020 on ttyPS0 Welcome to PYNQ Linux, based on Ubuntu 18.04 (GNU/Linux 4.19.0-xilinx-v2019.1 armv7l) To run a command as administrator (user “root”), use “sudo ”. See “man sudo\_root” for details. xilinx@pynq:~$ ---
**Author:** ![FrankB](https://avatars.discourse-cdn.com/v4/letter/f/278dde/32.png) [@FrankB](https://discuss.pynq.io/u/FrankB)\ **Post date:** [July 17, 2020, 10:52pm UTC](https://discuss.pynq.io/t/solved-cant-boot-the-pynq-z2-red-led/1519/3 "2020-07-17T22:52:00Z")
it seems that both the PL server and the jupyterhub server is started just fine and linux boots. can you connect to jupyter? which pynq version are you using? ---
**Author:** ![Scout](https://avatars.discourse-cdn.com/v4/letter/s/fbc32d/32.png) [@Scout](https://discuss.pynq.io/u/Scout)\ **Post date:** [July 17, 2020, 10:57pm UTC](https://discuss.pynq.io/t/solved-cant-boot-the-pynq-z2-red-led/1519/4 "2020-07-17T22:57:27Z")
Thanks for asking @FrankB I were unable to connect to Jupiternotebook. The problem was with > systemd[1]: Failed to insert module ‘autofs4’: It was caused by a partitioning problem. I was using Rufus to burn the image, and I should use Win32 Disk Imager. After burning with Win32 Disk Imager I see colourfull LED’s.