Acer nitro 5 (possibly model n20c1) not charging or indicating life.

Hello, I have had an Acer nitro 5 for about three years, but now, suddenly, it will no longer charge. I cannot access anything on the computer due to the fact that it died while I was troubleshooting. I no longer have the box, and the words have faded, but I believe it is a n20c1 from what I can read.

Things I have already tried:

Power button: I have tried holding the power button for extended periods of time, but due to the computers lack of power, this hasn't been changing anything.

Charger: The charger does not seem to affect the computer. The charger is in mild condition, due to the fact that over time the cats of my house have bitten it. I don't think this is the problem because the charger stopping was abrupt, and no cats had bitten the charger for a long time.

Power bank: I have tried using a power bank to make sure it wasn't the fault of the charger. The power bank had no affect on the computer, and didn't cause the LEDs to glow.

External keyboard: I saw a post on here where someone thought maybe the problem on their computer was due to the power button on the keyboard no longer working. I plugged an external keyboard into the computer and tried the same steps as with the normal keyboard, but to no avail.

Additional information:

• I do not have the equipment or knowledge to test things inside of the computer
• I have tested multiple outlets, and that doesn't seem to be the problem
• I have used the power bank on other technology after it didn't work with my computer, and it itself works fine.
• The case is missing a screw. I don't know whether this is important or not, but if needed, the instructions for finding the screws position are the following.
• Flip the computer so the bottom is up.
• Orient computer so charging port is facing you.
• It is the bottom left screw next to one of the warning hot surface triangle stickers if the computer is sat right from the last two steps.

I hope this is enough information to diagnose the problem, and if not, I will try to respond to as many suggestions as I can. Thank you in advance for any help!