Cisco 1751V Hardware Installation Guide - Page 49
OK LED Diagnostics, Troubleshooting WICs and VICs - dram
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Chapter 3 Troubleshooting Problem Solving • ISDN configuration-Consider ISDN-specific hardware and software configurations (ISDN BRI WICs only). OK LED Diagnostics Use the front-panel OK LED to help determine any problems with the router. When the router first boots up, it performs a power-on self-test (POST). If the router detects a problem during the POST, the OK LED blinks in a different pattern (described in Table 3-1), depending on the problem. A pattern is a specific number of blinks that is repeated until the router is turned off. If the router experiences any of these problems, contact your Cisco reseller. Table 3-1 OK LED Blinking Patterns Number of Blinks 2 3 4 5 6 9 Meaning The 860P dual-port RAM (DPRAM) failed. The parameter RAM area of the 860P DPRAM failed. The 860P system protection control register has a write failure. The router cannot detect the dynamic RAM (DRAM). The user programmable machine has a write failure. The router DRAM failed. Troubleshooting WICs and VICs Use the show diag command to help determine problems with a card. Router# show diag Slot 0: C1751 1FE VE DV Mainboard Port adapter, 7 ports Port adapter is analyzed Port adapter insertion time unknown EEPROM contents at hardware discovery: Hardware Revision : 89.71 PCB Serial Number : JAB30343106 Part Number : 73-5128-02 Fab Version : 04 78-11258-04 Cisco 1751 Router Hardware Installation Guide 3-7