Acer Veriton 7800 Veriton 5800/6800/7800 Service Guide (Gigabyte MB) - Page 82

Error Symptoms List NOTE: To diagnose a problem, first find the error symptom 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. Error Symptom Processor / Processor Fan Action/FRU NOTE: Normally, the processor fan should be operative, and the processor clock setting should be exactly set to match its speed requirement before diagnosing any processor problems. Processor fan does not run but power supply fan runs. 1. Ensure the system is not in power saving mode. See "Power Management" in chapter 2. 2. With the system power on, measure the voltage of processor fan connector. Its reading should be +12Vdc. Its reading should be +12Vdc. If the reading shows normal, but the fan still does not work, then replace a good fan. 3. Main board. 1. Processor. 2. Main board. Main board and Memory NOTE: Ensure the memory modules are installed properly and the contact leads are clean before diagnosing any system problems. Memory test failed. Incorrect memory size shown or repeated during POST. 1. See "Memory" 2. Main board 1. Insert the memory modules in the DIMM sockets properly, then reboot the system. 2. Memory module. 3. Main board. 1. Enter BIOS Setup and load default settings. In Windows Systems, check settings in Power Management Property of Control Panel. 2. Reload software from Recovery CD. 1. 2. 3. 4. Diskette/IDE drive connection/cables Diskette/IDE disk drives See "Undetermined Problems". Main board Processor test failed. System works but fails to enter power saving mode when the Power Management Mode is set to Enabled. Blinking cursor only; system does not work. Diskette Drive NOTE: Ensure the diskette drive is auto-setting in BIOS Setup and its read/write head is clean before diagnosing any diskette drive problems.(If only one drive is installed, please make sure the drive is connected to master connector or the drive is set to master.) Media and drive are mismatched. 1. Ensure the diskette drive is configured correctly in the Disk Drives of BIOS Setup. 2. Ensure the diskette drive is correctly formatted. 3. Diskette drive connection/cable 4. Diskette drive 5. Main board 1. Ensure the diskette drive is not set to None in the Disk Drives of BIOS Setup. 2. Diskette drive power 3. Diskette drive connection/cable 4. Diskette drive 5. Main board Diskette drive does not work. 81 Chapter 4