eMachines EL1800 Service Guide - Page 57

POST Error Messages List If you cannot run the diagnostics program tests but did receive a POST error message, use "POST Error Messages List" to diagnose system problems. If you did not receive any error message, look for a description of your error symptoms in "Error Symptoms List" on page 66. NOTE: When you have deemed it necessary to replace an FRU, and have done so, you must run a total system check to ensure that no other activity has been affected by the change. This system check can be done through the diagnostics program. NOTE: Check all power supply voltages, switch, and jumper settings before you replace the main board. Also check the power supply voltages if you have a "system no-power" condition. If you are unable to correct the problem by using the "BIOS Messages List" table and "Error Symptoms List" table, go to "Undetermined Problems". To diagnose a problem, first find the BIOS error messages in the left column. If directed to a check procedure, replace the FRU indicated in the check procedure. If no check procedure is indicated, the first Action/FRU listed in right column is the most likely cause. BIOS Messages BIOS ROM checksum error System halted Action/FRU The checksum of the BIOS code in the BIOS chip is incorrect, indicating the BIOS code may have become corrupt. Contact your system dealer to replace the BIOS. CMOS Battery Failed CMOS Checksum Error- defaults loaded CPU at nnnn Display switch is set incorrectly The CMOS battery is no longer functional. Contact your system dealer for a replacement the BIOS. Checksum of CMOS is incorrect, so the system loads the default equipment configuration. A checksum error may indicate that CMOS has become corrupt. A weak battery may have caused this error. Check the battery and replace if necessary. Displays the running speed of CPU. The display switch on the motherboard can be set to either monochrome or color. This message indicates the switch is set to a different setting than indicated in setup. Determine which setting is correct, and then either turn off the system and change the jumper, or enter Setup and change the Video selection. Press ESC to skip memory test Floppy disk(s) fail HARD DISK initializing - Please HARD DISK INSTALL FAILURE The user may press Esc to skip the full memory test. Cannot find or initialize the floppy drive controller or the drive. Make sure the controller is installed correctly, if no floppy drives are installed, be sure the Diskette Drive selection in Setup is set to NONE or AUTO. Some hard drives require extra time to initialize. Cannot find or initialize the hard drive controller or the drive. Make sure the controller is installed correctly. If no hard drives are installed, be sure the Hard Drive Selection in Setup is set to NONE. Hard disk(s) diagnosis fail The system may run specific disk diagnostic routines. This message appears if one or more hard disks return an error when the diagnostics run. 51