5150 not boot

Hi All,

One day last week, I found my 5150 blinks its power-on and battery LEDs like crazy.

I had it plugged in at the time.  The laptop was off.  It fails to power back on since.

The harddrive is not on.  The fan is not running.  There's any noise from any component.

I took the battery out, plugged in the power cord, press the power button.  Only the

power-on & battery LEDs are blinking.  Nothing else is happened.  The screen is blank.

The laptop does not come up.  Does anyone know what's the problem with my 5150?

Please advise.  Thanks

 

-petenet