Question shutdown when power charger is unplugged, turns on automatically when I put it. ASUS N580GD Laptop

[vpguy]

My 2,5 years old laptop, an ASUS N580GD, is suddendly showing a common trouble of ASUS laptops, but not only ASUS ones.
I read many people faced these troubles but I’m not finding a solution.

• sudden shutdown on laptop when power charger is unplugged. A “Restore AC Power Loss” or "Wake on AC" or "Power on AC is not available in UEFI
• when I put the power plug in , the laptop turns on automatically and without pressing the power button
• battery is available but not charging (now it’s at 69% and I was able to update UEFI because system detects it)
• I bought a new battery, but the laptop behaves as with the old battery. It’s NOT a battery fault.
• If the power charger is not plugged, pressing the power button doesn’t turn on the laptop, in spite of battery at 69%.
• With power charger plugged, charging led is fixed orange
• MyAsus app detects NO problems
• At Windows 10 startup, battery icon shows the charging animation of bars: after 20 seconds it stops. I suppose it’s charging for these 20 seconds!
• I asked for support and they suggested me to follow https://www.asus.com/us/support/FAQ/1012793/ without success

Again: I bought a new original Asus battery and I have the same problems. It’s not a battery fault
I suppose this happened after a software update but I didn’t get which one.
Please somebody could help me to solve this!

 

[vpguy]

Interesting news: the battery is at 70% now. I suppose it's charging in the first 20 seconds at start! I think it's not a hardware problem!

 

[Vismo]

Hi, I’m having the same problem with my Vivobook X542Uf. The problem started after I replaced my old hdd with an ssd. Before installing windows again, when i put all back together i turned on the laptop and it booted fine. But, after installing windows again i started to have this problem. In the bios the battery is stuck at 60% also.
I made the same efforts as you to find a solution but, at this time I still don’t have a solution.