|Tell us the make and model of your brand name system, or if you have a generic desktop system, the make and model of the mboard. |
The specific model of a brand name system is shown on a label on the outside of the case somewhere, or it can often be determined by going to the brand name's web site.
The model, sometimes the make, of a mboard in a generic desktop system is usually printed on the mboard's surface in obvious larger characters, often between the slots.
The model is often also displayed on a logo (graphical) screen early in the boot, but it's often not as specific as the specific model number.
For Dell computers, they have a Service Tag number - the specific model can be determined by using that on their site, or can often be determined there automatically by you downloading some software. The Service Tag number should be on a label on the outside of the case, probably on the bottom on a laptop, on the back on a desktop, and is often also shown in the bios Setup.
If you have loaded or reloaded Vista from a regular DVD since the computer last came out of "sleep" mode properly, the ACPI features (Standby, Hibernate, sometimes Restart) may NOT work properly until AFTER you have loaded the main chipset drivers for the mboard, which inform Vista how the ACPI features are supported by the mboard.
In any case, if you hold the power button in until the computer shuts off, then press the power button briefly to boot, the computer should ALWAYS start up normally regardless of whether the main chipset drivers have been installed.
If it does not start up normally in that situation, something else is wrong.
Failing power supplies are common and can cause your symptoms.
They often partially work, fans and hard drives may spin, leds may come on, yet you may get no video and the mboard will not boot all the way.
"some one told me that it might work by shorting two jumper wire"
Some people tell you to briefly short the two pins for the power switch on the mboard because they think it's possible the power switch isn't working. Power switches are extremely reliable, I've never encountered one that does not work, but sometimes the button on the desktop case that presses on it gets stuck inwards such that the power switch is on all the time and in that situation the mboard would shut off in about 4 seconds and the mboard cannot boot again until the button is unstuck .
That can't apply to your case, because the mboard does at least partially boot, the fans spin.
Another common suggestion is to briefly short two places in the main connector's wiring together on the mboard when it's connected to the mboard, to supply the "power good" signal to the power supply to force the power supply to try to fully boot the mboard, to see if a non booting system will then boot.
That does not apply to your case either, because the mboard does at least partially boot, the fans spin.