So I have a dell xps 8700 and it was working ok before but now it ran into a problem. So it started when my computer froze but somehow the audio was still playing. When I restarted it was running but nothing was displaying. Not only that but the power button and the LED light on the inside was a stationary yellow. I tried to clean out as much as I can and even replaced the motherboard battery but nothing changed. 

I stuck now so what do I do now?