I've been dealing with this issue for more than two years so I decided to post here. This is the problem:
When lg monitor is plugged to lower vga port ( PCIE => ATI Radeon hd4650) it says ''no signal, monitor is going to stand-by in one minute''. When i plug it to other vga port ( integrated graphic card) it works but then ATI drivers don't function anymore and there is series of problems - every game crashes, in device manager monitor is recognized as vga controller not as plug and play monitor, fps drops when I use document reader or scroll a website, windows cannot shut down at all ( when turn off computer is clicked, there's message ''windows is sutting down'' CPU fan is still spinning and it stays like that infinitely) so i need to turn off power suplly to shut down windows.
Solutions i already tried: graphic card works on another PC, ATI drivers were installed correctly and up to date two years ago ( before the problem), when plugged to onboard graphics shut down doesn't work , but restart does ( there is still no signal on graphic card port), in BIOS primary graphic adapter is set to PCIE, I disconnected and reconnected graphic card , computer service guy said that there's electrical signal in lower vga (ATI Radeon) port, so I guess port is not broken.
I relize this is very hard issue, but any opinion,theory or professional advice will help. I really appreciate your thoughts so don't be shy and please reply ;)
os: windows xp professional sp3 (build 2600)
bios: American Megatrends Inc. version P1.30
motherboard: asrock p4i945gc