My fan starts but the light doesnt turn on and the monitor doesnt display anything

Monitors can have a different on swicth, make sure the power button is on and the monitor is still plugged into a power source would be your first check. http://omputer.howstuffworks.com/monitor.htm

Sounds like either the Monitor is bad or the Video Card is bad. Try plugging another monitor on the computer and if it can't show a display then more than likely the Video Card is bad. If it shows on the monitor you just plugged in, then the original monitor is bad.

If the Monitor is displaying no infomation at all, your display signal from the PC to the monitor has failed.
1: Check the cable between the monitor and PC
2: If you are using onboard graphics then that display port is faulty.
3: If you are using a graphics card then remove it and try the onboard graphics.
4: Your monitor maybe faulty aswell so test it on another computer to be safe.

Its more likely to be option 2

Check it with an external monitor if it is showing video the videocard is ok and may be the display itself ,but if it doesnt show anything the videocard is bad

Looks like the lights are on? Fans spin? Sounds like the harddrives spinning? The power supply is bad. has just enough power to light lights, and spin fans, but not enough for the processor. (No beep sounds, because BIOS hasn't done a memory count. It's not going to)

ALL the lights use less than 1 Watt.
EACH fan uses 2 to 3 Watts.
The harddrive just sitting there spinning, uses about 5 watts.

Processors use 55 Watts to 125 Watts. Depends on the processor.
Not enough power to turn the processor on, the computer won't work. Computer isn't working there isn't anything to turn the monitor on. No Signal.

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the very first thing that u can try is that try it with the different ac adaptor and the battery and try it with the differnt ac aaaadaptor and still it doesnt then wahat u said is that u can hear the sound of the fan and the disk is trying to read but u cannnot see anything on the screen adn all u need to clearify is that if the computer is actually running or not and if it is working then what u can do is that connect the external monitor and then try and turn on the laptop and if u get a good display in te external monitor then definately replace the lcd screen and also what u can try is that try and reboot the computer in the safe mode and if turns on and u can see the display in the screen then do the system restore and it will be fine.......and as u said that u get a choppy sound from the fan then what u can do is that try and clean the fan from the back or by opening it......anbd it will not get any sound from the fan......good luck....

I would first recommend reseting the bios, if the monitor still is black then it may be a problem with the graphics card

Hi..there,
It's seems you got a busted backlight inverter. Need to replaced a new one or repaired it. Happpy Holidays!

I have the same problem, the CPU fan spins, keyboard lights blink, no start up screen, or bios.
But, when I push a few times on the pc reset button, then the CPU fan is becoming still, the keyboard light are out and I can start the computer again in a normal way.
Can this one be a temporally solution for you too? Do you have any suggestion about?
I guess it can be an electricity dysfunction of a wrong fixed cable.