I've looked on the lot of other threads and I can't seem to find a solution. I've recently took out my ram because I thought I may have had a bad stick. I have Four sticks of ram each 4gbs, I took them out and put them back in and my computer looks like it's booting up fans work graphics card lights up but sadly I can not get a display on my monitor. I took out the cmos battery for 15 minutes put it back in, took power cord out held the power button for 10 seconds let it drain out but still I'm stuck with mouse not lighting up FX lights on computer not lighting up and no display on monitor. Please help I read a lot of different threads and it seemed like taking cmos battert out helped other people but dosent seen to work with my situation. I know the monitor is working properly because I have my ps4 running through it.