I have a Dell digital monitor (DEL4015), I've had it for about 5 months or so. It has 4 USB slots, two on the left side and two on the bottom. All have worked flawlessly in the past up until a few days ago. I noticed as I plug my flash drive into any of them the light on the drive blinks once then shuts off (normally it stays on the whole time it is plugged in) and my PC does not detect it, or any other thing plugged into the monitors ports. I checked the drivers and the are all up to date and nothing else seems to be wrong with the monitor. What could the problem be here?