Compaq AP550 Compaq Professional Workstation AP550 Maintenance & Service G - Page 126

4-32 Compaq Professional Workstation AP550 Maintenance and Service Guide Memory Error Code 200-xx 202-xx 203-xx 204-xx 211-xx 214-xx 215-xx Table 4-14 Memory Test Error Codes Description Memory machine ID test failed. Memory system ROM checksum failed. Memory write/read test failed. Memory address test failed. Random pattern test failed. Noise test failed. Random address test failed. Recommended Action Reinsert RIMM in correct location. The following steps apply to error codes 202-xx through 215-xx: 1. Remove one pair of RIMMs at a time until the error message stops. 2. Replace other removed RIMMs one pair at a time, testing each to ensure the error does not return. 3. Replace the system board and retest. Keyboard Do not hold down a key during the boot-up sequence. Holding down any key during the boot-up sequence causes the Basic Input Output System (BIOS) to beep, as a warning of possible keyboard problems. Wait until after the system has booted, then press the Num Lock key. If the Num Lock light on the keyboard toggles on and off with each press of the Num Lock key, then the keyboard is functioning properly. Error Code 300-xx 301-xx 302-xx 304-xx Table 4-15 Keyboard Test Error Coded Description Keyboard ID test failed. Keyboard self-test/interface test failed. Individual key test failed. Keyboard repeat test failed. Recommended Action The following steps apply to error codes 300-xx through 304-xx: 1. Check the keyboard connection. If disconnected, turn the computer off and connect the keyboard. 2. Replace the keyboard and retest. 3. Replace the system board and retest.