HP Designjet 2800/3800cp Service Manual - Page 39

System Error: 010021 AXXXXXXX Problem Description: The base DRAM or the RAM SIMM tests failed. Corrective Action: Try the following: NOTE: The Printer will not function without any RAM SIMMs installed. Make sure that you have a minimum of 4MB memory module installed. D If the Error Data is higher than A4000000 then the failure is in the RAM SIMM. Try the following to solve the problem. S Check that the RAM SIMMs (memory modules) are the original HP supported parts. If the RAM SIMMs are from a 3rd Party then they should be replaced by HP supported parts before troubleshooting the problem any further. Product functionality cannot be guaranteed with 3rd party RAM SIMMs. S If more than one RAM SIMM (memory module) is installed, remove one of them and power on the printer again. If this system error is displayed again, reinstall the removed RAM SIMM and remove the other RAM SIMM and then power on the printer again. If this system error appears again then try to replace both RAM SIMMs with new ones. D If the Error Data is lower than A4000000 then the failure is in the Base DRAM. Replace the Electronics Module ' page 8-6. System Error: 010022 Problem Description: The SWATH RAM test failed. Corrective Action: Replace the Electronics Module ' page 8-6. 2-4 HP DesignJet CP Series Printers System Error Codes