Blue boot led on for 5 sec with key boot light but it is not booting

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Urgent!!! Model: acer Predator triton 300 i5 9th gen
Last night after doing my internet search i shut down laptop with low battery signal. Today in morning i kept it on charge for 2 hours and then removed adapter. When in evening i tried to boot only blue boot led remained on for 5 sec with key boot light(blue) when i tried to check power source by connecting adapter it was blue light(fully charged).
After some net surf...i tried power reset(holding power button for 30 sec kept it for 2 hrs and then charged it for 30 min) . When it was charging again it shows orange light but after 5 min it turned blue again. 
And booting problem remained same
****I tried ctrl+alt+del
Alt+f10         F2 for bios......

But it was all same....no improvement
PS: screen was blank(black) all these time......




Please suggest me i have an interview in 5 days....i need to prepare for it😭😭😭😭😭

Commodore_1995#

What is the exact model of the notebook? Example AN515-51-75kz. Also, the computer will only start when the power adapter is connected, correct? To reset the battery on some models, it is necessary to turn off the notebook, disconnect the power adapter and press the power for 12 seconds.