User manual DELL OPTIPLEX GX240

[. . . ] DellTM OptiPlexTM GX240 Systems User's Guide w w w. c o m Notes, Notices, and Cautions NOTE: A NOTE indicates important information that helps you make better use of your computer. NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the problem. CAUTION: A CAUTION indicates a potential for property damage, personal injury, or death. Abbreviations and Acronyms For a complete list of abbreviations and acronyms, see the "Glossary. " ____________________ Information in this document is subject to change without notice. [. . . ] The problem is resolved. Hardware Conflicts Hardware conflicts occur when the operating system detects multiple devices that are attempting to operate on the same computer resources when those resources cannot be shared between the devices. Symptoms: · · · · · · · · Computer hangs or locks up, particularly while using a specific device. Memory parity errors occur on parity-enabled computers. Noise or other problems from sound cards. Unintelligible characters printed on the printer. Mouse pointer hangs and does not move or moves in a stuttering fashion. Messages stating that the computer is not operating at maximum performance. Errors and crashes of applications for no apparent reason. Nothing displays on the video monitor. To resolve hardware conflicts, remove any newly added hardware and contact the hardware manufacturer. Also see your operating system documentation. Computer Memory Problems During POST, the computer checks the computer's memory, determines the amount of installed memory, and then writes to and reads from the number of available bytes to ensure proper operation. Basic Checks: · · · · If an insufficient memory message appears, save and close any open files and exit any open application programs not in use. Consider installing additional computer memory. Run the System Memory test in the Dell Diagnostics. Reseat the memory modules. 184 So l vi n g Pro b l em s · Restart the computer. If the problem still exists after you complete the basic checks, fill out the Diagnostic Checklist as you perform the following steps. CAUTION: Before you perform this procedure, see "CAUTION: Safety Instructions. " 1 Reboot the computer. Does the RAM count displayed correctly match the actual amount of memory installed in the computer?The computer needed to update the memory count. Go to step 2. 2 Run the System Memory test group in the Dell Diagnostics. Go to step 3. 3 Turn off the computer and devices, disconnect them from their electrical outlets, wait 10 to 20 seconds, and then open the computer cover. Rotate the power supply away from the system board. Close the computer cover, reconnect the computer and devices to their electrical outlets, and turn them on. Does the RAM count displayed correctly match the actual amount of memory installed in the computer?Contact Dell for technical assistance. 4 5 6 System Board Problems A system board problem can result from a defective system board component, a faulty power supply, or a defective component connected to the system board. [. . . ] Commonly implemented schemes include FTP and http. The part after the colon is interpreted according to the access scheme and can introduce an IP address, indicate a path or file on a server, or locate a particular position within a specified document. USB Universal Serial Bus. An interface for devices such as keyboards, joysticks, scanners, speakers, or printers, that provides a maximum transfer speed of 12 Mb/second. Devices plug directly into a four-pin connector on your computer or into a multiport hub that connects to your computer. [. . . ]