So i have a dell inpsiron 5577. When i press the power button, it starts up and my key board backlight and charging LED light turn on as it normally does. But that's it. Nothing happens. The screen is black,the fan is not on and the hard disk doesn't come on too ( but my OS is on my solid state drive). It doesn't boot up. It started when i reached work on Friday morning, i plugged my phone to it using a usb cable and powered up the laptop, but the afor-mentioned state is what i saw. The phones brand is itel, it's a small cheap phone i bought for making calls. I suspect the phone did this because before i left for work, i plugged my tablet to my laptop and turned it on and it was fine. I've tried removing the battery and holding down the power button for 30s,60s,2 minutes but nothing. I've tried plugging it to my tv via hdmi (i've successfully done this many times) to see if it displays anything, but it says no signal. I've also tried removing the ram stick and putting it back and resetting the bios by removing and putting back the cmos battery, but again nothing. Pls help, it's a fairly new laptop,a little more than a year old.