HP Compaq dc. 79. Business PC Troubleshooting Without Diagnostics. Check that the computer and monitor are plugged into a working electrical outlet. Check that the voltage select switch some models is set to the appropriate voltage for your region 1. V or 2. 30. V. Check that the computer is turned on and the green power light is on. Mdmp File Viewer here. Check that the monitor is turned on and the green monitor light is on. Check the Power LED on the front of the computer to see if it is flashing red. The flashing lights are error codes that will help you diagnose the problem. Refer to Appendix A, POST Error Messages for more information. Turn up the brightness and contrast controls of the monitor if the monitor is dim. Press and hold any key. If the system beeps, then the keyboard should be operating correctly. Check all cable connections for loose connections or incorrect connections. Wake the computer by pressing any key on the keyboard or pressing the power button. Install Windows Xp On Hp Dc7900' title='Install Windows Xp On Hp Dc7900' />If the system remains in suspend mode, shut down the computer by pressing and holding the power button for at least four seconds then press the power button again to restart the computer. If the system will not shut down, unplug the power cord, wait a few seconds, then plug it in again. The computer will restart if it is set to power on automatically as soon as power is restored in Computer Setup. If it does not restart, press the power button to start the computer. Be sure that all the needed device drivers have been installed. For example, if you are using a printer, you need a driver for that model printer. Remove all bootable media diskette, CD, or USB device from the system before turning it on. If you have installed an operating system other than the factory installed operating system, check to be sure that it is supported on the system. If the system has multiple video sources embedded, PCI, or PCI Express adapters installed embedded video on some models only and a single monitor, the monitor must be plugged into the monitor connector on the source selected as the primary VGA adapter. During boot, the other monitor connectors are disabled and if the monitor is connected into these ports, the monitor will not function. You can select which source will be the default VGA source in Computer Setup. Install Windows Xp On Hp Dc7900' title='Install Windows Xp On Hp Dc7900' />Search for the QuickSpecs you are looking for online in Literature server or via Google Custom Search. You can also download QucikSpecs locally on your pc by using. How To Install Windows Xp On Hp Dc7900' title='How To Install Windows Xp On Hp Dc7900' />google. IE httpgoogle. co. Google. Find support and troubleshooting info including software, drivers, and manuals for your. View and Download HP Compaq dc7900 USDT technical reference manual online. Compaq dc7900 Series Business Desktop Computers. Compaq dc7900 USDT Desktop pdf manual. D8155676?v=v2' alt='Install Windows Xp On Hp Dc7900' title='Install Windows Xp On Hp Dc7900' />HP CD DVD Free Driver Download Free Download HP, Inc. CD DVD drivers. Worlds most popular driver download site. Download the latest drivers for your HP Presario V3500 Notebook PC to keep your Computer uptodate.