Can a faulty VGA cable be responsible for a system crash?

Manojit Ghosh said:

@redoak Have you read the entire thread including post #8? How can a flaky monitor cause so much problem?

What is seen on your monitor is not necessarily what is happening in the PC. To try another monitor seems a reasonable idea to me. Indeed I would try the monitor in another PC if you can get access. It's got to be worth a try. At least it would eliminate the monitor.

I had similar problems with my desktop PC and my Iiyama monitor 3 years ago. I first thought it was my GeForce GT 730 graphics card:

- removed the 730, blew out the tiny amount of dust, refitted and switched to onboard graphics:

- same problem. Then I bought a DVI cable and used that instead, it worked. Tried the VGA cable in another PC on another monitor:

- produced similar problems on that PC. Tried another, known good, VGA cable on my monitor and my PC:

- same problems.

CONCLUSION: my monitor has a shafted VGA socket. Still working fine with a DVI cable connection today.

Manojit Ghosh said:

@mitchell65 Results of replacement tests are inconclusive due to the unpredictable nature of the problem. I've done that. I will do that again. At the moment, I want to focus on the onboard graphics card. Is there any way I can check the health of my onboard graphics card?

Are you saying that when you plug in a different monitor and a different cable the same problem exists?
THe only way I know to check the onboard graphics is to fit a second graphics card in the PC. Plug the monitor into that card and it will automatrically bypass the onboard graphics!

Understood Manojit. You have no DVI input on your monitor. Apologies: sorry, I have no further ideas.

Hi,
Personally I stopped dual booting on the same drive as another os it is just too problematic or at least for me
I use one of these to swap out different os's it has made life so much more straight forward especially when win-10 and linux is involved :)
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If a monitor goes into sleep mode it senses no activity as you probably already know
What is causing it there is no telling :/

Have you tried safe mode with networking ?