I am seeing a lot of people complaining that they need to use battery reset (
https://us.answers.acer.com/app/answers/detail/a_id/34843/~/acer-internal-battery-reset) lot of time to get this thing running. The laptop crashes randomly. After a forced shutdown, you can't see anything beyond glowing keyboard backlight. 
Here are few of my observations:-
1) Looks to me like Acer has produced a faulty batch of laptops. (Just see the most recent certified purchase reviews onFlipkartt). See this as well:- 
https://www.acer.com/ac/en/US/search?q=ph315-512) Also, if you're able to get it running and update win10 to Latest April release of 1018, the onboard graphics UHD 630 drivers get screwed up and you see a complete green screen while playing any videos. (Microsoft partly to be blamed for this)
3) The BIOS of this machine is pretty latest one. So I don't think upgrading it is an option this immediately.
Motherboard
	Manufacturer	CFL
	Model	Sienta_CFS (U3E1)
	Version	V1.05
	Chipset Vendor	Intel
	Chipset Model	ID3E10
	Chipset Revision	07
	Southbridge Vendor	Intel
	Southbridge Model	IDA30D
	Southbridge Revision	10
		BIOS
			Brand	Insyde Corp.
			Version	V1.05
			Date	30-03-2018
4) I don't think this is happening with i7 8750H models, only with i5 8300H ones. 
5) If you look around the internet, a lot of people are complaining same battery reset PIN method with different ACER models. Particularly the one comes with non-removal battery.  God knows if ACER is capable of understanding any of these. 
** Better for replacement, than to be sorry for rest of the year. Acer is pure uncooperative in this regard. ZERO care for customers.
Notes:-
For Issue 2, get latest UHD 630 drivers from here:- 
https://www.intel.com/content/www/us/en/support/products/126790/graphics-drivers/graphics-for-8th-generation-intel-processors/intel-uhd-graphics-630.html Date: 22-May-2018 
Version: 24.20.100.6094 (Latest) 
OS: Windows 10, 64-bit*