I recently build a gaming rig for my little brother so he can play league of legends with me my older brother and our cousin during these times of staying inside due to the rona it has a 500w cooler master power supply some sort of budget 100 Asus motherboard 5 case fans an old 1080 p Acer moniter a mid tear graphics card I work part time and am in high school so building a budget system is really all I could a afford and have been recently frustrated because I boot up my pc and the moniter works for awhile then just goes black after like 30 seconds and I have no clue how to fix it if anyone has any tips please it would be much appreciated