Sudden shutdown on laptop when power charger is unplugged

[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.

1) 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
2) when I put the power plug in , the laptop turns on automatically and without pressing the power button
3) battery is available but not charging (now it’s at 69% and I was able to update UEFI because system detects it)
4) I bought a new battery, but the laptop behaves as with the old battery. It’s NOT a battery fault.
5) If the power charger is not plugged, pressing the power button doesn’t turn on the laptop, in spite of battery at 69%.
6) With power charger plugged, charging led is fixed orange
7) MyAsus app detects NO problems
8) 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!
9) 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!

 

[bazz2004]

Asus chargers for laptops are cheap on ebay. Perhaps buy one to eliminate that possibility or borrow a charger.

 

[VPGuy]

Asus chargers for laptops are cheap on ebay. Perhaps buy one to eliminate that possibility or borrow a charger.

thank you for your suggestion but it doesn't explain why It's not booting with battery only

 

[bazz2004]

True but even with a new battery you are not getting above 70% charge.
Is there any Asus software installed to control charging?

 

[bazz2004]

It's weird that it turns on when you plug in the charger. I did find a thread for an HP laptop that might be relevant.

Laptop turns on by itself when plugged in

1. Product Name and Number HP Pavilion DV2540ev 2. Operating System installed Windows Vista 64-bit So,i have the above HP Pavilion with windows vista installed.All of a sudden when i plug in my laptop to the socket then the laptop just powers on by itself without me pressing the power...

h30434.www3.hp.com