开机后出现如下代码，那位神人帮忙解释一下，最好有解决办法。

System Bootstrap, Version 12.4(13r)T11, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 2009 by cisco Systems, Inc.

Initializing memory for ECC
..
c2811 platform with 524288 Kbytes of main memory
Main memory is configured to 64 bit mode with ECC enabled

Upgrade ROMMON initialized
program load complete, entry point: 0x8000f000, size: 0xcb80
program load complete, entry point: 0x8000f000, size: 0xcb80

program load complete, entry point: 0x8000f000, size: 0x1867060

Error : compressed image checksum is incorrect 0x70F13C4A
        Expected a checksum of 0x01F13C4B

*** System received a Software forced crash ***
signal= 0x17, code= 0x5, context= 0x80014da0
PC = 0x8000f0d4, Cause = 0x20, Status Reg = 0x3040a803
c2811 platform with 524288 Kbytes of main memory
Main memory is configured to 64 bit mode with ECC enabled

Upgrade ROMMON initialized
program load complete, entry point: 0x8000f000, size: 0xcb80
program load complete, entry point: 0x8000f000, size: 0xcb80

program load complete, entry point: 0x8000f000, size: 0x1867060
Self decompressing the image : ######################################
Error : Uncompression of the image failed.
invalid compressed data－－format violated

Error : zip decompress failed

*** System received a Software forced crash ***
signal= 0x17, code= 0x7, context= 0x80014da0
PC = 0x8000f0d4, Cause = 0x20, Status Reg = 0x3040a803
c2811 platform with 524288 Kbytes of main memory
Main memory is configured to 64 bit mode with ECC enabled

Upgrade ROMMON initialized
program load complete, entry point: 0x8000f000, size: 0xcb80
program load complete, entry point: 0x8000f000, size: 0xcb80

program load complete, entry point: 0x8000f000, size: 0x1867060
Self decompressing the image : ######################################
Error : Uncompression of the image failed.
invalid compressed data－－format violated

Error : zip decompress failed

*** System received a Software forced crash ***
signal= 0x17, code= 0x7, context= 0x80014da0
PC = 0x8000f0d4, Cause = 0x20, Status Reg = 0x3040a803
c2811 platform with 524288 Kbytes of main memory
Main memory is configured to 64 bit mode with ECC enabled

Upgrade ROMMON initialized
program load complete, entry point: 0x8000f000, size: 0xcb80
program load complete, entry point: 0x8000f000, size: 0xcb80

program load complete, entry point: 0x8000f000, size: 0x1867060
Self decompressing the image : ######################################
Error : Uncompression of the image failed.
invalid compressed data－－format violated

Error : zip decompress failed

*** System received a Software forced crash ***
signal= 0x17, code= 0x7, context= 0x80014da0
PC = 0x8000f0d4, Cause = 0x20, Status Reg = 0x3040a803
c2811 platform with 524288 Kbytes of main memory
Main memory is configured to 64 bit mode with ECC enabled

Upgrade ROMMON initialized
Entering rommon> prompt after several failed attempts to boot an IOS image.
Please check your internal/external flash drives for the correct IOS image
and issue ‘reset‘ at the rommon> prompt to re-try the boot process.
rommon 1 >