I'm going to try my best to explain this, the only way to do that is to simply describe what happens.
First off, the monitor goes white ONLY when the screen was off for a while.
At first I thought it was a power problem, because I first found this bug when I lost power overnight, and in the morning when I turned it on, the screen was white.
However, I turned off the screen with the button on the monitor, and accidentally left it like that overnight, and the same thing happened today.
This is what happens when it has no power and comes back on:
I start the computer, or login, or simply turn on the monitor.
It slowly fades to complete whiteness in about 3-5 seconds.
I still can see my mouse moving around while it does this, and it's still a clear picture.
If I mess around with it for long enough, it DOES work fine. This is why I don't think it's a monitor problem. I normally just power on the monitor, wait like a century and a half, and then plug it into the PC after waiting ages, and it magically fixes itself.
I feel like it may be an operating system problem, but I can't tell.
Once I 'get it working', it works 100% fine until then next time I leave it off for a long period of time.
I can even restart the computer, unplug the monitor, etc. as long as I plug it in in a few minutes.
If I plug it into just the power, the monitor works fine. All the settings and such are visible.
The second I plug it into the computer, it goes white.
Which is why I don't think it's a monitor problem..
When I do wait a while before plugging it into the PC again, it'll start flashing in a pattern-like manner. Each flash slowly gets slower and slower until it's only flashing once every minute or so. Then it stops completely, and the monitor works just fine.
I'm running some old Dell and Windows 8.1. I'll list more specific specs if I need to, but it seems very much like a driver or program problem. (Which I have updated, and didn't fix it)