My laptop won't turn on when i push my power button then show only three lights power light,battery light and webcam light but

[Pawan lenovo]

My laptop won't turn on when i push my power button then show only three lights power light,battery light and webcam light but screen does not open. Screen is totaly blanked.

 

[wildcard1978]

On laptops they don't also use a mainboard speaker that beeps to tell you if ram issue no video ect on butt. Look at the lights sometime they blink in Morse code and tells ya just like the Morse code error beeps of desktops not always but usually do. First place to start