My computer is not booting

[kishan]

hi guys,
I have a p4 1.7 ghz machine with 845 motherboard. Whenever i switch on the pc, the boot process does not start. the power indicator becomes on, the harddisk indicator lights up for a couple of seconds and then becomes off. The cabinet fan also is working. The monitor light just keeps blinking.
This happened a couple of times earlier. Then, i just checked for loose connctions in the cabinet and then the pc used to boot. Now nothing happens. What could be wrong?

[wizrulz]

Check ur PSU...and then the harddisk....also try changing the CMOS battery

[shankar_ganesh]

Check whether your RAM is properly placed.

[wizrulz]

any specific nos of beeps???

[jatt]

first of all plz start your pc without ups and then check if problem still you have to check your power supply plz check it if possible change it with your freinds pc check these then tell me

[kishan]

@wizrulz
my PSU & harddisk both seem to be fine... and I get no beeps at all.
The power indicator(green light) stays on but the harddisk indicator (red light) becomes off after about 2 seconds.

@shankar_ganesh
My RAM is also properly placed.

I will try to change the CMOS battery and also try out what jatt suggested.
I Will post reply after trying.

[kishan]

@wizrulz
I changed the CMOS battery but problem remains.

@jatt
problem remains even if i start pc without ups... and the power supply seems to be fine.

Any other suggestions?

[jatt]

its may be your motherboard problem check that if possible