Hi all, I have a very strange and annoying problem. I Windows Key+L to lock my PC whenever I leave the house or go to work etc, and soon after locking the PC (about a minute), the monitors would usually turn themselves off/go to sleep. Now, for the last few days, I've noticed that the monitors are staying on all the time, and never going to sleep, which is very annoying. I haven't changed any settings or done anything that I'm aware of that would have affected this. Any ideas on how to rectify this issue, so that the screens turn off/go to sleep soon after locking the PC? Thanks.