CPU overheating on Juniper SRX240. How to fix?

Question

Iron

The Juniper SRX240 turns off within a few minutes of the console becoming available. The logs show that the CPU is heating up. Would you like to know why and how to fix it? Reinstalling different firmware versions did not help. An autopsy did not reveal any obvious problems, the fans work, even much faster due to heating( Thanks in advance!
U-Boot 1.1.6-JNPR-1.7 (Build time: May 4 2010 - 06:59:58
) minor:45, serial #: AADS1293
OCTEON CN5230R-SCP pass 2.0, Core clock: 600 MHz, DDR clock: 333 MHz (666 Mhz data rate)
DRAM: 1024 MB
Starting Memory POST...
Checking datalines... OK
Checking address lines... OK
Checking 512K memory for U-Boot... OK.
Running U-Boot CRC Test... OK.
Flash: 4 MB
USB: scanning bus for devices...
Root Hub 0: 3 USB Device(s) found
Root Hub 1: 1 USB Device(s) found
scanning bus for storage devices... 1 Storage Device(s) found
Clearing DRAM.. ...... done
BIST check passed.
1:00:00.0 Vendor/Device ID = 0x811210b5
1:01:07.0 Vendor/Device ID = 0xc72414e4
Boot Media: nand-flash usb
Net: octeth0
POST Passed
Press SPACE to abort autoboot in 1 seconds
ELF file is 32 bit
Loading .text @ 0x8f000078 (246092 bytes)
Loading .rodata @ 0x8f03c1c4 (13940 bytes)
Loading .rodata.str1.4 @ 0x8f03f838 (16580 bytes)
Loading set_Xcommand_set @ 0x8f0438fc (104 bytes)
Loading .rodata.cst4 @ 0x8f043964 (20 bytes)
Loading .data @ 0x8f044000 (5620 bytes)
Loading .data.rel.ro @ 0x8f0455f4 (120 bytes)
Loading .data.rel @ 0x8f04566c (136 bytes
) 11912 bytes)
## Starting application at 0x8f000078 ...
Consoles: U-Boot console
Found compatible API, ver. 1.7
FreeBSD/MIPS U-Boot bootstrap loader, Revision 1.7
([email protected], Tue May 4 07:15:51 UTC 2010)
Memory: 1024MB
[0]Booting from nand-flash slice 1
Un-Protected 1 sectors
writing to flash...
Protected 1 sectors
Loading /boot/defaults/loader.conf
/kernel data=0xb15b3c+0x13464c syms=[0x4+0x8bb00+0x4+0xcac15]
Hit [Enter] to boot immediately, or space bar for command prompt.
Booting [/kernel]...
Kernel entry at 0x801000e0 ...
init regular console
Primary ICache: Sets 64 Size 128 Asso 4
Primary DCache: Sets 1 Size 128 Asso 64
Secondary DCache: Sets 512 Size 128 Asso 8
GDB: debug ports: uart
GDB: current port: uart
KDB: debugger backends: ddb gdb
KDB: current backend: ddb
kld_map_v: 0x8ff80000, kld_map_p: 0x0
Copyright (c) 1996-2015, Juniper Networks, Inc.
All rights reserved.
Copyright (c) 1992-2006 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
JUNOS 12.1X46-D35.1 #0:2015-05-14 23:19:08 UTC
[email protected]:/volume/build/junos/12.1/service/12.1X46-D35.1/obj-octeon /junos/bsd/kernels/JSRXNLE/kernel
JUNOS 12.1X46-D35.1 #0: 2015-05-14 23:19:08 UTC
[email protected]: /volume/build/junos/12.1/service/ 12.1X46-D35.1/obj-octeon/junos/bsd/kernels/JSRXNLE/kernel
real memory = 1073741824 (1024MB)
avail memory = 509661184 (486MB)
FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
Security policy loaded: JUNOS MAC /pcap (mac_pcap)
Security policy loaded: JUNOS MAC/runasnonroot (mac_runasnonroot)
netisr_init: !debug_mpsafenet, forcing maxthreads from 4 to 1
cpu0 on motherboard
: CAVIUM's OCTEON 52XX CPU Rev. 0.8 with no FPU implemented
L1 Cache: I size 32kb(128 line), D size 8kb(128 line), sixty four way. L2 Cache :
Size
512kb , 8 way _ hub, class 9/0, rev 2.00/1.00, addr 1 uhub0: 1 port with 1 removable, self powered uhub1: vendor 0x0409 product 0x005a, class 9/0, rev 2.00/1.00, addr 2 uhub1: single transaction translator uhub1: 3 ports with 2 removable, self-powered
umass0: STMicroelectronics ST72682 High Speed ​​Mode, rev 2.00/2.10, addr 3
dwc1: on obio0
usb1: on dwc1
usb1: USB revision 2.0
uhub2: vendor 0x0000 DWC OTG root hub, class 9/0, rev 2.00/1.00, addr 1
uhub2 : 1 port with 1 removable, self powered
cpld0 on obio0
pcib1: on obio0
Disabling Octeon big bar support
PCIe: Waiting for port 0 to finish reset
PCIe: Port 0 link active, 2 lanes
PCIe: Waiting for port 1 to finish reset
PCIe: Port 1 link active, 1 lanes
pcib1: Initialized controller
pci0: on pcib1
pcib2: irq 0 at device 0.0 on pci0
pci1: on pcib2
pci1: at device 2.0 (no driver attached)
pci1: at device 7.0 (no driver attached)
pcib0: on obio0
pci2: on pcib0
pci2: at device 0.0 (no driver attached)
gblmem0 on obio0
octpkt0: on obio0
cfi0: on obio0
Timecounter "mips" frequency 600000000 Hz quality 0
## #PCB Group initialized for udppcbgroup
###PCB Group initialized for tcppcbgroup
da0 at umass-sim0 bus 0 target 0 lun 0
da0: Removable Direct Access SCSI-2 device
da0: 40.000MB/s transfers
da0: 1000MB (2048000 512 byte sectors: 64H 32S/T 1000C)
Trying to mount root from ufs:/dev/da0s1a
MFSINIT: Initialising MFSROOT
Process-1 beginning MFSROOT initialization...
Creating MFSROOT...
/dev/md0: 20.0MB (40956 sectors) block size 16384, fragment size 2048
using 4 cylinder groups of 5.00MB, 320 blks, 640 inodes.
super-block backups (for fsck -b #) at:
32, 10272, 20512, 30752
Populating MFSROOT...
Creating symlinks...
Setting up mounts...
Continuing boot from MFSROOT...
Attaching /cf/packages/junos via /dev/mdctl...
Mounted junos package on /dev/md1...
A
Media check on da0
Automatic reboot in progress...
** /dev/da0s1a (NO WRITE)
** Last Mounted on /
** Root file system
** Phase 1 - Check Blocks and Sizes
** Phase 2 - Check Pathnames
** Phase 3 - Check Connectivity
** Phase 4 - Check Reference Counts
** Phase 5 - Check Cyl groups
155 files, 74985 used, 74541 free (45 frags, 9312 blocks, 0.0% fragmentation)
mount reload of '/' failed: Operation not supported
Verified junos signed by PackageProduction_12_1_0
Verified jboot signed by PackageProduction_12_1_0
Verified junos-12.1X46-D35.1-domestic signed by PackageProduction_12_1_0
Checking integrity of BSD labels:
s1: Passed
s2: Passed
s3: Passed
s4: Passed
** /dev/bo0s3e
FILE SYSTEM CLEAN; SKIPPING CHECKS
clean, 12424 free (16 frags, 1551 blocks, 0.1% fragmentation)
** /dev/bo0s3f
FILE SYSTEM CLEAN; SKIPPING CHECKS
clean, 171782 free (118 frags, 21458 blocks, 0.1% fragmentation)
Checking integrity of licenses:
Checking integrity of configuration:
rescue.conf.gz: No recovery data
Loading configuration ...
Time and ticks drifted too much, resetting synchronization..
.mgd: commit complete Setting
initial options: .
Starting optional daemons: usbd.
Doing initial network setup:.
Initial interface configuration:
additional daemons: eventd.
Additional routing options:kern.module_path: /boot//kernel;/boot/modules -> /boot/modules;/modules/ifpfe_drv;/modules;
kld netpfe drv: ifpfed_dialer ipsec kld.
Doing additional network setup: ntpdate.
Starting final network daemons:.
setting ldconfig path: /usr/lib /opt/lib
starting standard daemons: cron.
Initial rc.mips initialization:.
Local package initialization:.
starting local daemons:set cores for group access
.
kern.securelevel: -1 -> 1
Creating JAIL MFS partition...
JAIL MFS partition created
boot.upgrade.uboot="0xBFC00000"
boot.upgrade.loader="0xBFE00000"
Boot media /dev/da0 has dual root support
** /dev/da0s2a
FILE SYSTEM CLEAN; SKIPPING CHECKS
clean, 75053 free (37 frags, 9377 blocks, 0.0% fragmentation)
Tue Aug 25 12:10:24 MSK 2015
[email protected]ASE> show chassis fan
Item Status RPM Measurement
SRX240 PowerSupply fan 1 OK 0 (null)
SRX240 PowerSupply fan 2 OK 0 (null)
SRX240 CPU fan 1 OK 0 (null)
SRX240 CPU fan 2 OK 0 (null)
SRX240 IO fan 1 OK 0 (null)
SRX240 IO fan 2 OK 0 (null)
[email protected]> show chassis environment
Class Item Status Measurement
Temp Routing Engine OK 33 degrees C / 91 degrees F
Routing Engine CPU OK 119 degrees C / 246 degrees F
Fans SRX240 PowerSupply fan 1 OK Spinning at high speed
SRX240 PowerSupply fan 2 OK Spinning at high speed
SRX240 CPU fan 1 OK Spinning at high speed
SRX240 CPU fan 2 OK Spinning at high speed
SRX240 IO fan 1 OK Spinning at high speed
SRX240 IO fan 2 OK Spinning at high speed
Power Power Supply 0 OK
AWaiting (max 60 seconds) for system process `vnlru_mem' to stop...done
Waiting (max 60 seconds) for system process `vnlru 'to stop...done
Waiting (max 60 seconds) for system process `bufdaemon' to stop...done
Waiting (max 60 seconds) for system process `syncer' to stop...
Syncing disks, vnodes remaining...0 0 0 0 done
syncing disks ... All buffers synced.
Uptime:
3m55s
Turning the system power off.

Answer 1

Open it up and see what's cool. Turn on without cover, make sure the fan works efficiently.

Answer 2

Well, if it’s heated to disassemble and check and the truth is heating up or the sensor has gone crazy, you can simply check the temperature with your hand, if it’s heated, check the radiator, or it’s gone or the thermal paste has leaked.

Answer 3

[email protected]> show chassis routing-engine
Routing Engine status:
Total memory 1024 MB Max 369 MB used ( 36 percent)
Control plane memory 544 MB Max 364 MB used ( 67 percent)
Data plane memory 480 MB Max 312 MB used ( 65 percent )
CPU utilization:
User 38 percent
Background 0 percent
Kernel 32 percent
Interrupt 0 percent
Idle 30 percent
Model RE-SRX240H
Serial ID AADS1293
Start time 2015-09-07 11:17:47 MSK
Uptime 2 minutes, 56 seconds
Last reboot reason 0x1:power cycle/failure
Load averages: 1 minute 5 minute 15 minute
10.25 2.92 1.10
[email protected]> show system core-dumps
/var/crash/*core*: No such file or directory
/var/tmp/*core*: No such file or directory
/var/tmp/pics/*core*: No such file or directory
/var/crash/kernel.*: No such file or directory
/tftpboot/corefiles/* core*: No such file or directory
[email protected]> show security flow session summary
Unicast-sessions: 4
Multicast-sessions: 0
Failed-sessions: 0
Sessions-in-use: 4
Valid sessions: 4
Pending sessions: 0
Invalidated sessions: 0
Sessions in other states: 0
Maximum-sessions: 131072

Answer 4

Start by cleaning the dust