I bought a pc from craigslist and I don't remember the specs except the Geforce gtx 950. I'm not knowledgeable in computers so sorry in advance. I brought it home and long story short, factory reset the pc and now my monitor won't detect the pc. The person I bought it from installed windows 10 prior to purchase so I may have deleted it. The pc turns on with light and fans going but monitors say no signal. If anyone can help, it would be appreciated.