My acer nitro 5 an515-58 won't turn on, When press power button the led turns blue for about 5 sec

Do the Hard Reset but this time take the bios battery out also and then with a paper clip, short its + and - pins for 2 seconds out, after you have removed the main battery and the ram, leave everything disconnected for 15min, reconnect all components and also check if the ram is faulty by inserting another module that you know that works, or if you have 2x ram modules only insert 1x only and swap the ram modules to see if any are faulty, as a faulty ram module will cause a blank screen and a no boot, as and after your ram is checked and its ok and you have done all the above, the laptop should boot properly if all its circuitries are functioning properly

If the laptop doesn't boot after doing all the above, then your laptop has problems in its primary power stage circuitries inside the laptop, these circuitries turn the laptop on, this is either with a capacitor or a mossat that has burned out or shorted and needs replacing but, if its a mosat in the primary power stages, its allot more critical as the power mosats govern the power going to the cpu or gpu and in a worst case scenario you could have burned out the cpu or gpu and that means a no repair and you need a new motherboard replacement Best is to take your laptop to an experience technician that has all the tools and micro soldering equipment to analyze and fix your laptop.

If this answers your question and solved your query please "Click on Yes" or "Click on Like" if you find my answer useful.