Hewlett Packard Compaq Presario SR 1000 Microsoft Window XP Home Edition Version 2002, Service Pack 3 2.19Ghz, 1.00GB of RAM ACPI Uniprocessor PC AMD Athlon ™ 64 Processor 3700+ NVIDIA GeForce 6200SE TurboCache™ My current monitor is a LCD, Plug and Play monitor, manufacturer: standard monitor type, model WJ1780PI, D-12055 - one straight wire connecting to a VGA port. Hello I have posted a thread on this already on advise on how to set up dual monitors. Guess what after over 7 years my PC will now not switch on. All I did was had a look at the back in order to take a picture. Tried switching the VGA into another slot it see if the slot was enabaled. It wasn't and so swapped it back. When I removed and inserted the cables each time the PC was switched off. When I plugged in back into the original VGA slot and switched the machine back on it was working fine. Have updated version of Norton and the day after switched it on and the fan is making a hugh racket folowed by I think some clicking noises and there just remains a black screen on the monitor. Switched it off and waited a wee while, checked the cables and tried again. Day after that got some dust removal spray for computers and gave it a good spray and made sure the airways are clean. Done this before in the past. The very next day switched on and still the same situation - fan running really loud, followed with I think a few clicking sounds - not sure which part the fan is running, base unit has a green light, amber light on the monitor, black screen. What could have happened. It was working fine after I put the VGA slot back into the original slot. Could it be the power supply, CPU overheating.???