Video drivers can be very tricky. After over 35 years in the business this has been the number one problem for all kinds of strange results. To completely uninstall and then reinstall drivers completely something like: Display Driver Uninstaller Download version 188.8.131.52 is required. Why? Because all kinds of files, registry settings, etc. can get subtly corrupted. Normal uninstall, reinstall, etc. can miss some of these. As a matter of fact I just fixed one this morning. I thought the card was defective because of the the yellow exclamation mark and the error messages in the Device Manager. All is sweet now! This is not to say that there is not some other cause but for me 98% of the time it has been the driver (same for touchpads).
Take out battery: Samsung NP300E5C Battery Replacement Try resetting BIOS: https://www.youtube.com/watch?v=UXDZXDif... I would ignore the desoldering part and just remove the CMOS “coin” battery, to the right ,top of video before where he does the desoldering. This will help with disassembly - clearer than video: Samsung NP300E5C-A09US Motherboard Replacement
Have had this happen with Acers myself. Was your previous W10 and upgrade form W7? Generally a driver issue. Do a COMPLETE unistall of driver. i.e. uninstall and then run something like Ccleaner, Privazer or Advanced System Care (all long standing freeware) to clean up leftovers. Personally, I use Driver Booster to find latest drivers from the web.
What RyZen CPU are you using? Unplug: * SSD’s (1) Mouse and keyboard (2) Try no RAM then one RAM module at a time in different sockets. * Look for a loose screw that may be causing a short. (1) Troubleshooting is always a process of elimination. (2) Fans spinning, anything on screen?
I would first completely uninstalling the graphics driver using Display Driver Uninstaller in Safe Mode: https://www.majorgeeks.com/files/details... following their instructions. Then reinstalling the GTX 970 drivers. If this fixes the problem then you are good, if not then I would: (1) Resocket the memory cards. (2) Test the system RAM using Memtest86 Free https://www.majorgeeks.com/files/details... (3) If problems found then try one module at a time and see if problem goes away. Any how a start. Let us know how it goes.
This may help you. Recently I upgraded an old DELL Inspiron 6000 to an SSD mSATA drive (Kingston 120G SSDNOW UV500) and it worked amazingly, for its age, with Windows 10. Of course I had to use an mSATA to IDE adapter but you might use an mSATA to 2.5” SATA adapter which are quite cheap and easily found. Just an idea. Let us know how it goes?
Have you looked over the IFIXIT guides for this model? Acer Nitro 5 AN515-53-55G9 The battery replacement guide shows the parts best. This may also help to show you how to remove the drive properly: https://us.answers.acer.com/app/answers/...-drive-installation-instructions-for-acer-aspire-nitro-5 Your hard drive looks like it is sitting on the cover so I’m guessing you did not take off the hard drive cover off, gently removed the hard drive and disconnected its cable, before removing the main cover? Maybe not? I see the hard drive connector, in your not very clear photo, connected to the drive sitting on the main cover so it looks like you inadvertantly yanked the other end of the drive cable away from the connector ON the motherboard. The ribbon cable connects near the cooling fans. If the fan is covering it So flip the cover over and correctly remove the hard drive cover and drive module. Disconnect the cable from the drive and reconnect the ribbon cable to the slot for it on the motherboard. Need more...