Black screen after a certain amount of time
in IT Support ·
Jerry Robinson56 said:No bootable device — insert boot disk and press any key
What > mentioned earlier
could be anything from faulty SATA connectors to the actual drive itself.
1) Honestly, I’m not totally sold on that theory. I actually worked on a laptop just the other day that used to throw that exact error message in MS-DOS constantly, cycling through every single drive it could find. The funny thing was, if you tried to install Windows 10 using a CD-ROM, it would fly right through the process without even acknowledging those "missing" drives, and then it would run perfectly fine once everything was set up. This whole situation feels like another case where the issue isn't necessarily a dead disk, especially since the computer boots up and functions normally otherwise.
2) While seeing an error like that during an old-school MS-DOS boot sequence makes sense, you almost never see a message like that pop up once the OS is actually running.
If I had to guess, it sounds like we might be looking at an uncontrolled reboot within MS-DOS, which usually points toward a RAM issue, a motherboard hiccup, or maybe just some dusty contact between the memory and the board—something I could probably fix easily with a little 😁 ☕
ps: You sometimes see messages like this on drives formatted specifically through Windows OS, like via Windows disk management, even when they are perfectly healthy. A few years back, I got a handful of 3.5" floppies for free, formatted them using a Windows 98SE startup CD, and then they worked like a charm once I moved them over to Windows XP. On my old desktop setups, those drives would show that same prompt the second the machine powered on.
I don't spend all my time messing with boot sequences, but if I remember correctly, there's usually a connection to UEFI, EFA, or some other boot protocol involving a DOS boot file, though I doubt that's what's happening here.
Regarding that sudden restart > experienced when jumping from Windows back to MS-DOS on that laptop, it could honestly be a dozen things—maybe a driver conflict, likely the GPU, or it could just be a software glitch, a virus, or even a momentary power surge. It's hard to say for sure.
Just a side note: My own desktop, the one I'm typing on right now, has only restarted three times in the last two years, and that only happened while I was browsing the web via Mozilla Firefox on Windows XP.
