Compaq D51s Troubleshooting Guide - Page 54

Post Error Messages Numeric Codes and Text Messages Code/Message 201-Memory Error Beeps None 202-Memory Type Mismatch 207-ECC Corrected Single Bit Errors in Memory Module Socket(s) y,y, ... None 2S* 212-Failed Processor None *L = Long, S = Short Probable Cause RAM failure. Memory modules do not match each other. Single Bit ECC error. Processor has failed to initialize. Recommended Action 1. Run Computer Setup or Windows utilities. 2. Ensure memory and continuity modules are installed correctly. 3. Verify proper memory module type. 4. Remove and replace the memory module(s) one at a time to isolate faulty module. 5. Replace faulty memory module(s). 6. If error persists after replacing memory modules, replace the system board. Replace memory modules with matched sets. 1. Verify proper memory module type. 2. Try another memory socket. 3. Replace memory module if problem persists. 1. Reseat the processor in its socket. 2. If the processor does not respond, replace it. A-4 Troubleshooting Guide