Device seems completly dead

Hello,

I have a Acer Aspire E1-570 (I couldn’t choose it in the devices list) that won’t power on. I chose chkdsk in Win 10 to run after an reboot and it started normally after booting normally. Then I went away for ~8 hours (it was connected to power) and when coming back, it was completely dead.

It remained like that ever since. When I plug in the power cord, nothing happens, no single LED turns on and no sound is audible. Same when pressing the power button. Same without the battery. Same with the battery taken out and having held the power button for more than 30 seconds. Can the device even turn on without a battery connected? I tried with the charger from another Laptop (which has the same voltage and a fitting plug and provides enough current). Nothing happened as well.

Do you have some ideas what could have happened?

Edit 1: I did swap the single RAM stick into the second slot but nothing changed.