Question Laptop won't start on pressing power button ?

[Aviator636]

The only way to start my old ASUS x54c laptop is to reset the bios by removing CMOS battery plugging in the charger.
It turns on as soon as power cable is plugged in, but won't start when power button is pressed ?
Any idea why this is happening and how to fix this??

 

[barebackclaire]

have you tried replacing the CMOS battery?

 

[Aviator636]

have you tried replacing the CMOS battery?

Yes its new