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Repair and troubleshooting information for the Acer Aspire V Nitro series laptop computer with model number VN7-591G.

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Acer VN7-571G - turning off by itself without warning and doing a rest

Hi. I'm new here and I'd like to ask something about one of my laptops, the "VN7-571G", which is behaving abnormally. It turns on and I can use it for a while. I upgraded the hardware of the laptop to be more responsive and reliable, but it turns out that it's not reliable at all. It originally had 8GB of RAM, a 1TB hybrid SSHD and a WiFi 5 card. I upgraded the RAM to 16GB, installed a 128GB SSD and instead of the SSHD, I installed a normal 2TB HDD for files. So far so good. Then I cleaned up the fans and replaced the thermal paste with some fresh Arctic MX-4. Proceeded to upgrade the WiFi card and installed a Intel WiFi AX200, which works perfectly fine as well. But..

The laptop turns off for some reason as if it would not get enough power. The battery was old so I got a brand new battery to replace that as well, but yesterday it did the same thing again! Even with the new battery.. And it ridiculously showed me 76% of battery wear level after turning off and and on again! (which was the same wear level it had with the previous battery, but sometimes it showed 13% as well)

And now the laptop simply does not work reliably. It simply shuts off without any warning. Just like it would be a restart, but without warning. I don't really know what to do next. I didn't damage anything on the board as I'm sure that I have disassembled 800+ laptops, for repairing and/or cleaning the inside. But I don't have any information on what could cause that issue. I mean.. if it would overheat, it wouldn't turn on again instantly after it shuts down, right? And why does it still think that the battery is "bad"? The battery wear level fluctuates from 0% to 75%, this is really the first time I'm experiencing something like that.

Do you guys have any ideas?

Then please let me know!



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Hi @axemre

Things to try to isolate what the problem may be:

  • Uninstall the battery drivers in Device Manager, restart the laptop and check performance. Go to Device Manager → Battery → click on the > (or +) symbol to the left of the category to expand the list right click on the Microsoft ACPI-Compliant Control Method Battery entry and select Uninstall device and follow the prompts. Restart the laptop and allow Windows to reinstall the drivers and check. To get to Device Manager in Win10/11 press the Win key + the x key (both together) and click on the Device Manager link in the menu box that opens.
  • Create a battery report to view the condition of the battery. It is not unknown for "new" batteries to be faulty. When you have the report, compare the Design Capacity value versus the Full Charge Capacity value shown in the report. For a new battery they should be the same value. You can work out the condition of the battery as a percentage of what it is compared to a good new battery, by using the formula Full Charge Capacity x 100 ÷ Design Capacity.
  • Run this free standalone memory test program to make sure that the memory is all OK. The beauty of this test is that you won't have to load Windows to run it, so you are just testing the hardware.
  • Check in Event Viewer for any Critical, Error or Warning events that may be logged at the same time that the laptop resets. If there are any events logged at those times, search online for the Event ID and Source of the event to find out what it means and what the possible causes for the event could be. To get to Event Viewer in Win10/11 press the Win key + the x key (both together) and click on the Event Viewer link in the menu box that opens.

Does it also do this with the charger connected?

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Hi, thanks for the answer! Unfortunately, it does do the same when it's plugged in. The battery capacity is correct, it's 100% as I've got it yesterday and replaced the old one. I'll run the memtest as well, and I'll try to remove the device manager entry as well.



Uninstalling the driver is only a way to reset it in case it still has any information stored regarding the old battery. Restarting the laptop after uninstalling will install the drivers again so it will recognise etc the new battery.

Don't forget to check Event Viewer as well.



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