Windows 10: Laptop will not boot at all, not even from DVD

Slightly puzzled- batteries fail, so need replacing, and this is (probably) a replacement battery:
asus VivoBook S551LN-1A Battery, Replacement 6-Cell asus VivoBook S551LN-1A Laptop/Notebook Battery

So is yours particularly inaccessible? I saw one laptop disassembly where most things had to come out to get at the battery- Asus X551CA (not yours) but can't find a video or instructions for your model.

You said you've removed the CMOS battery (probably a small round silver one). For more modern BIOS using flash memory, that's independent of that battery- which is just to keep the clock ticking.

Increasingly sounds like either your BIOS has been corrupted (why? - unknown) or some other hardware problem (strange coincidence).

 

Since the built in keyboard doesn't seem to work to get into the bios have u tried a usb keyboard yet?

 

I've inserted 2 bootable USBs and it won't boot into them, let alone detecting a USB keyboard.

 

I think I might have to replace the motherboard. Could you tell me if it modifies my personal files or any files on the hard disk please? Thanks.

 

It seems like your PC is not posting. To answer your question, your system may not be bootable after a MB replacement, but the files should be recoverable.

Back when I overclocked systems (way back), the recovery was a jumper on the MB to reset the bios. A second option was the CMOS battery, however, you have stated there is an irremovable battery. I have only replaced CPU/APU fans and WIFI connections on laptops, but maybe there is a way to execute that reset jumper available on desktop MB's on a laptop ?

 

Well I've taken out the component that's apparently the CMOS battery (the round thing), but even with draining all the power in the battery, the BIOS can't be reset.

 

It does sound like that MB might be shot. If u get the same board or 1 that uses a similar chipset u could get it to boot.
At any case u can always save your data. Just remove the hard drive and hook it up as a secondary drive on another system and copy all your data.

 

The same thing was happening to my desktop. I took it to a computer technician and everything tested fine. Coincidentally, it posted and booted after re-seating the memory, but I do not think it was the re-seating that fixed it. It still refuses to post every now and then, but seems to fix itself after resetting the computer button enough times. It was as if my computer was possessed! I do not want to sound paranoid, but I think somebody has control over my computer.

 

I just had the same issue of not being able to boot. What I did was hit esc as soon as the Asus splash screen appears and then chose the boot device. In my case, I chose the dvd as I went back to 7 not having a 10 backup or access to another computer to get a recovery disc for 10. It took 9 hours the first go around, then ran it again from the HD as it failed, and gave me a message that running recovery again may fix the problem. The second run took around an hour, and I'm in business getting things set back up. I'm not sure if not having the usb or dvd first in the boot order from BIOS will affect anything doing it this way if you can't get into BIOS. but it might be worth trying.

 

...I'm pretty sure your situation is very different from mine. My problem is that my laptop won't start up at all, only some indicators light up and that's it; no ASUS splash screen, nothing from display, etc. Anyways fortunately your problem was solved.

 

If all is still lost, found this link.

CMOS-Reset - How to reset the CMOS? (Reset BIOS settings) | biosflash.com