If you find yourself in the situation where a Cisco 7200 series router has a corrupted IOS image or the flash drive has gone on the blink, the following documents may be useful to you. Not all of these documents are Cisco 7200 specific, but they are all useful.

• Standard Break Key Sequence Combinations During Password Recovery
  This document includes standard break key sequences for many of the terminal emulation software apps you might be using. Personally, I use Z-Term from my MacBook.
• Password Recovery Procedure for the Cisco 7200 Series Routers
  Oops, password went missing.
• ROMmon Recovery Procedure for the Cisco 7200, 7300, 7400, 7500, RSP7000, Catalyst 5500 RSM, uBR7100, uBR7200, uBR10000, and 12000 Series Routers
  If the router is stuck in ROMmon, this document will give you some tips for getting past that. Usually this means the router is specifically configured to boot into the ROM monitor, or the boot helper image is corrupt.
• How to Upgrade from ROMmon Using the Boot Image
  Although it doesn't have any routing ability, the boot image is really powerful. You can use it to replace the corrupted software image or put a new image on a fresh flash card.