This is an XP Home OS system. Upon start up, the monitor will not display (black screen). It is a LCD monitor. If we do a forced shut down and then restart (it may take more than one restart), we canget the monitor to display properly and once it is working, it works OK for the duration or until we shut down the system again. BELARC shows the video adapter to be a SiS 650_651_M650_740. This appears to be an integrated video adapter but I am not sure. What are some things I should check to diagnose this problem? Drivers? Install a new video adapter card? Try a different monitor? etc. etc. PS...the connections are tight.