Tried to upgrade RAM … no display

Hey there so I tried to upgrade my RAM on my PC and I installed the RAM then turned back on PC just to be greeted by a yellow light. It’s been 18 hours of me trying to find a solution with no avail.

I have done: Re-seating the Rams (only got two slots) Cmos battery and shorting Trying to get into Bios

I also just ran my computer without no RAM and I still get same yellow light

Any other tips? Would appreciate the help got work to do in the morning.