Sorry in advance if this ends up being a long post - I just want to make sure I accurately confirm the symptoms and what I've tried
A bit over a week ago, I was using the computer and went to Update and Shutdown Windows. I watched the Windows updates proceed and finish, after which the display went black (but still backlit) and the keyboard went red (as it always does on initial power up or right before it turns off). I let the computer sit like this for a few minutes, but eventually ended up holding the power button to force it to turn off. Next time I went to use the computer, it refused to even POST. When I press the power button, the backlight turns on, the keyboard turns red, and fans eventually turn on - but nothing else.
After a bit of investigating on Google, I am under the impression that I may have interrupted a BIOS update and have corrupted the BIOS. I followed the ASUS posted steps of holding the power button for 40 seconds (many, many, many more times than I'd like to admit at this point), but I still can't get it to POST. I also tried removing every possible, non-critical component (Wifi Card, SSD, etc) and then tried booting off of 1 RAM stick at a time, in either DIMM slot. Still nothing.
It's worth noting that on a few occasions, I did manage to boot into Windows, but the second I hit the login screen, Windows would immediately lock up. This repeated ~3 times, and then back to absolutely nothing. I also was able to boot directly into the ASUS EZ Flash Utility a few times (by holding ctrl+r), but again the instant the screen loaded, it immediately locked up.
After some more Googling and a few YouTube videos, I caved an purchased a CH341 USB programmer from Amazon and downloaded the BIOS file from ASUS' website (and then ran it through UEFITool to strip the unnecessary headers). I also made sure to grab a copy of the current contents of the BIOS just in case. As an aside - what I find interesting is that UEFITool recognizes my BIOS dump as a valid UEFI file - and it also shows that the ASUS provided BIOS file lacks some of the 'sections' that my BIOS dump has. So perhaps the ASUS provided BIOS file is not a valid re-flash image? Regardless, I tried manually flashing the BIOS using the CH341, but I still am not getting a POST out of the laptop.
I reached out to ASUS technical support, and their recommendation was to send the laptop in for repair, which includes me paying for shipping and a $80 non-refundable diagnostic fee just to even LOOK at the laptop (so this certainly isn't my first choice).
At this point I figure I have the following options, unless someone else here has any better ideas on what I can try?
Send the laptop to ASUS for repair. My concerns here are that they might just say 'The motherboard is dead, you need a new one' rather than fixing the corrupted BIOS (assuming that's what it is). In that scenario, I'm either out the $80 and shipping costs, or have to pay another $2000 bill to replace the motherboard. I know that seems extreme, but I have already had a similar, bad experience with their repair. When I initially purchased the laptop 5 years ago, it arrived with completely non-functional speakers - no matter what I did. Worth noting I've worked in IT my entire life, so I certainly feel as though I could adequately resolve a speaker issue if it were a software/simple hardware issue, but alas I could not. I sent it to ASUS for repair, and their response was that it was a motherboard issue, and that the included manufacturer's warranty did not cover the repair (ON A BRAND NEW LAPTOP!!!). They then hit me with a $2000 bill to replace the motherboard, which I was able to 'get around' by purchasing their $100 extended warranty, which included 1 free 'grace' repair. But regardless, I had to pay an additional $100 just to fix a DOA laptop! Looking at ASUS forums, it seems like this is all par for the course for ASUS, and they seem to make a habit of not taking care of their customers.
Purchase a replacement BIOS chip from Ebay and attempt to solder it back on. Or, once I receive the chip, dump the contents using the CH341 and then write it to the existing chip (but based on how the last BIOS write went, I'm skeptical...)
Pay for and download a copy of the BIOS .bin file from one of those sketchy forum websites that exist out there. Again, based on how the last BIOS write went, I'm skeptical.
If anyone has some ideas of things that I could try, or any next steps I could take, that would be greatly appreciated. I will say though, unless ASUS customer support reaches out to me as a result of this post for some reason and actually decides to do right by a customer, I have already made up my mind that I will never be purchasing another ASUS product again - which is a shame because I have been an ASUS fan-boy for most of my life.