My Laptop is not starting up, fan noise, overheat

My laptop has stopped turning on recently.

Whenever i turn on the laptop, this following things happens in different time:

1) sometimes the LED near charger port blinks one then done...laptop doesnt turn on

2) sometimes the caps lock light is on but no display at all and turns off after sometime

3)sometimes both charger and caps lock LED doesnt light up and there is no display

I tried every tutorials in youtube or article abt removing battery, pressing power for 30s and all...sometimes works but not always.

When it is finally on somehow, the fan us making a lot of noise and the cpu is overheating too... And from today the fan is rarely spinning and when it spins makes loud noise.... I m currently updating my system bios to see if the problem resolves and i m afraid of turning off my laptop coz it might not open again like before.... Please experts help me...there is no local repair shop that i m currently in... I have in my hometown but since exams is like week away...i have no other option but to fix it myself