CTRL+break doesn't work, cannot boot on Rommon.

Question

GoodDay to All,
Im using a 1750 router, and then i upgrade it to higher version, after
then i reload it, the problem it does not goes to start-up mode or
even the rommon mode,not enough memory to load the image, it always
rebooted after the self-decompressing image,
I try to stop it using the CTRL+Break, but it doesn't work.
Here are the error message.
Smart Init is disabled. IOMEM set to: 20
Memory required: 31637548 bytes, Memory available: 25165824 bytes
INSUFFICIENT MEMORY TO LOAD IMAGE!
The difference between Memory required and Memory available is the additional
memory you need to run the router. Alternately, use a smaller image; this
may cause the memory requirement to decrease, and may allow you to at least
use the router with reduced functionality until you get more memory.
*** System received a Software forced crash ***
signal= 0x17, code= 0x200, context= 0x8000620c
PC = 0xffffffff, Vector = 0x200, SP = 0xffffffff
System Bootstrap, Version 12.0(3)T, RELEASE SOFTWARE (fc1)
Copyright (c) 1999 by cisco Systems, Inc.
C1700 platform with 24576 Kbytes of main memory
program load complete, entry point: 0x80008000, size: 0x6b4628
Self decompressing the image : #################################
################# [OK]
Smart Init is disabled. IOMEM set to: 20
Thanks,
Lester

Answer 1

Hi Lester,
After trying all the above suggestions, if you still are facing issues then open the router's box and take out the Flash SIMM... it will try to look for an IOS file thrice and then will fall into rommon automatically
You can use the following link for hardware installation:
http://www.cisco.com/en/US/customer/products/hw/routers/ps221/prod_configuration_guide09186a0080099429.html#wp1077820
After you are in rommon, issue the command "confreg 0x2100" and "reset" the router, you will again go into rommon
Then insert the FLash once again in the chassis and then bootup again, because of config-register 0x2100, the router will go to rommon and then you should check the new IOS that you are trying to install.
Your router should have sufficient amount of DRAM to load that IOS, infact it'll help if you post the exact file names of the previous IOS and the new IOS along with your routers DRAM and Flash Capacity (But this is a secondary task which we can think of once you are able to go into rommon)
Regards,
Neeraj