Acer Veriton 7800 Veriton 5800/6800/7800 Service Guide (Gigabyte MB) - Page 86

Error Symptom Parallel/Serial Ports Action/FRU Execute "Load BIOS Default Settings" in BIOS Setup to confirm ports presence before diagnosing any parallel/serial ports problems. Serial or parallel port loop-back test failed. 1. Make sure that the LPT# or COM# you test is the same as the setting in BIOS Setup. 2. Loop-back. 3. Main board. 1. Ensure the printer driver is properly installed. Refer to the printer service manual. 2. Printer. 3. Printer cable. 4. Main board. 1. Refer to the service manual for the printer. Keyboard Some or all keys on keyboard do not work. Pressing power switch does not turn off system. (Only unplugging the power cord from electrical outlet can turn off the system.) Pressing power switch does not turn on the system. 1. Keyboard Power Supply 1. Ensure the Soft-off by PWR-BTTN. in BIOS Setup of Power Management is not set to Instant-off. 2. Power switch cable assembly 1. Ensure the power override switch (situated at the back of the machine, just above the connector for the power cable) is not set to OFF. 2. Power switch cable assembly. 1. Load default settings. 2. Reload software from Recovery CD. Printing failed. Printer problems. Executing software shutdown from Windows98 Start menu does not turn off the system. (Only pressing power switch can turn off the system). No system power, or power supply fan is not running. Any other problems. 1. Power Supply 2. Main board Other Problems 1. Undetermined Problems 85 Chapter 4