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### Instruction:
SHELFMGR-4-NO_HB_RECEIVED
### Response:
(Severity: 4), (Category: PLATFORM), (Description: This indicates that something is wrong in shelfmgr's ability to receive Heart Beats, OR there are simply no cards sending HBs.), (Recommended Action: Copy the error message exactly as it appears on the console or in the system log, call your Cisco technical support representative and provide the representative with the gathered information.)
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