Hello,   A few days ago i tried starting up my router and it got stuck in a boot loop   I tried erasing the flash & nvram via rommon & transfered the ios onto it again because i thought it might have corrupted. Didn't work   I tried transfering the ios directly to the NVRAM & booting it via there. Didn't work   Here is the boot up process, can anyone help me out here?   Kind regards, Bloedlink   rommon 23 > reset System Bootstrap, Version 15.0(1r)M16, RELEASE SOFTWARE (fc1) Technical Support: http://www.cisco.com/techsupport Copyright (c) 2012 by cisco Systems, Inc. Total memory size = 4096 MB - DIMM0 = 2048 MB, DIMM1 = 2048 MB CISCO3945-CHASSIS with C3900-SPE150/K9 with 4194304 Kbytes of main memory Main memory is configured to 72/72(dimm 0/1) bit mode with ECC enabled Readonly ROMMON initialized program load complete, entry point: 0x4000000, size: 0x18fa0 program load complete, entry point: 0x4000000, size: 0x18fa0 IOS Image Load Test ___________________ Digitally Signed Release Software program load complete, entry point: 0x4000000, size: 0x68a54f8 Self decompressing the image : ################################################# ################################################################################ ################################################################################ ################################################################################ ################################################################################ ################################################################################ ################################################################################ ################################################################################ ################################################################################ ################################################################################ ################################################################################ ########################################################################### [OK] *** No sreloc section Smart Init is enabled smart init is sizing iomem TYPE MEMORY_REQ HWIC Slot 0 0x00200000 HWIC Slot 1 0x00200000 PVDM 0 0x00200000 SM Slot 1 0x00600000 SM Slot 2 0x00600000 SM Slot 3 0x00600000 OIR memory 0x00600000 Onboard devices & buffer pools 0x0230F000 ----------------------------------------------- TOTAL: 0x0410F000 Extended memory present. IOMEM set to the maximum: 255MB. Rounded IOMEM up to: 255MB. Using 12 percent iomem. [255MB/2048MB] Restricted Rights Legend Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subparagraph (c) of the Commercial Computer Software - Restricted Rights clause at FAR sec. 52.227-19 and subparagraph (c) (1) (ii) of the Rights in Technical Data and Computer Software clause at DFARS sec. 252.227-7013. cisco Systems, Inc. 170 West Tasman Drive San Jose, California 95134-1706   Cisco IOS Software, C3900 Software (C3900-UNIVERSALK9-M), Version 15.5(3)M5, REL EASE SOFTWARE (fc1) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2017 by Cisco Systems, Inc. Compiled Wed 25-Jan-17 08:12 by prod_rel_team   : Unexpected exception to CPU: vector 300, PC = 0x44BAE2C , LR = 0x44BAE28 -Traceback= 0x44BAE2Cz 0x4026074z 0x40AEFA4z 0x40AEFA4z 0x4026130z 0x4206400z 0x 4F5AA2Cz 0x402481Cz 0x40AF48Cz 0x40B0928z 0x447501Cz 0x5B4C3A4z 0x5B4C724z 0x4F6 8798z 0x4F4F6C8z M8500 CPU Register Context: PC = 0x044BAE2C MSR = 0x02029200 CR = 0x42008042 LR = 0x044BAE28 CTR = 0x074D4EAC XER = 0x20000000 DEAR = 0x04026080 PVR = 0x80210030 DEC = 0x0000DE26 TBU = 0x00000000 TBL = 0x1D051C46 DBCR0= 0x41000000 DBCR1= 0x00000000 DBCR2= 0x00000000 IAC1 = 0x00000000 IAC2 = 0x00000000 DAC2 = 0x00000000 DAC2 = 0x00000000 R0 = 0x83C1000C R1 = 0x4208E460 R2 = 0x9BBFFC7B R3 = 0x1182D768 R4 = 0x0000EA60 R5 = 0x00000000 R6 = 0x00000000 R7 = 0x05C39350 R8 = 0x00000000 R9 = 0x00000000 R10 = 0x00000004 R11 = 0x00000000 R12 = 0x42008042 R13 = 0x6B6575EB R14 = 0x0000FFFF R15 = 0x130A4410 R16 = 0x129768C4 R17 = 0x130A4234 R18 = 0x1182B2EC R19 = 0x0CFB69D8 R20 = 0x00000000 R21 = 0x00000002 R22 = 0x1183269C R23 = 0xDF840000 R24 = 0x130A45B0 R25 = 0x129962BC R26 = 0x1182B34C R27 = 0x00000002 R28 = 0x12980000 R29 = 0x04026080 R30 = 0x00000000 R31 = 0x04026080 TEXT_START : 0x0400019C DATA_START : 0x0C000000 No fault history 0x0 === Flushing messages () === Buffered messages: Queued messages: *Jan 2 00:00:02.899: %SYS-3-LOGGER_FLUSHING: System pausing to ensure console d ebugging output. *Jan 2 00:00:01.263: %LICENSE-6-EULA_ACCEPT_ALL: The Right to Use End User Lice nse Agreement is accepted *Jan 2 00:00:01.263: %SMART_LIC-6-AGENT_READY: Smart Agent for Licensing is ini tialized *Jan 2 00:00:01.299: %IOS_LICENSE_IMAGE_APPLICATION-6-LICENSE_LEVEL: Module nam e = c3900 Next reboot level = ipbasek9 and License = ipbasek9 *Jan 2 00:00:01.355: %IOS_LICENSE_IMAGE_APPLICATION-6-LICENSE_LEVEL: Module nam e = c3900 Next reboot level = securityk9 and License = securityk9 *Jan 2 00:00:01.407: %IOS_LICENSE_IMAGE_APPLICATION-6-LICENSE_LEVEL: Module nam e = c3900 Next reboot level = uck9 and License = uck9 *Jan 2 00:00:01.459: %IOS_LICENSE_IMAGE_APPLICATION-6-LICENSE_LEVEL: Module nam e = c3900 Next reboot level = datak9 and License = datak9 *Jan 2 00:00:02.895: %MAINBOARD-4-ECC_SINGLE: A corrected single bit error has occurred in DRAM at location 0x148D1300 *Jan 2 00:00:02.899: %SYS-2-INTSCHED: 'may_suspend' at level 4 , all interrupts disabled -Process= "Init", ipl= 4, pid= 3 -Traceback= 5C39354b 3F4F304z 4405151Cz 4305F31Cz 4273820z 4F58178z 4015F70z *Jan 2 00:00:02.899: %SYS-2-INTSCHED: 'may_suspend' at level 4 , all interrupts disabled -Process= "Init", ipl= 4, pid= 3 -Traceback= 5C39354z 424F304z 4054151Cz 4052431Cz 44233820z 4F6823178z 40235F70 *** System received a SegV exception *** signal= 0xb, code= 0x300, context= 0x12b2f3c4 PC = 0x44bae2c, Vector = 0x300, SP = 0x4208e460 System Bootstrap, Version 15.0(1r)M16, RELEASE SOFTWARE (fc1) Technical Support: http://www.cisco.com/techsupport Copyright (c) 2012 by cisco Systems, Inc. Total memory size = 4096 MB - DIMM0 = 2048 MB, DIMM1 = 2048 MB CISCO3945-CHASSIS with C3900-SPE150/K9 with 4194304 Kbytes of main memory Main memory is configured to 72/72(dimm 0/1) bit mode with ECC enabled Readonly ROMMON initialized program load complete, entry point: 0x4000000, size: 0x18fa0 program load complete, entry point: 0x4000000, size: 0x18fa0   ... View more