Detailed hardware specs for RAM, CPU, PSU
Check the memory you are using is compatible with that board
Check the CPU is compatible with that board
power down
Remove unplug all unnescesarry hardware, drives, ssd's gpu's
clear cmos (PROPERLY), after power down wait for all led's to extinguish remove battery for 20 seconds then re insert)
install 1 stick of ram in whatever slot the motherboard book tells you to use in that scenario
Check you have both power connectors connected from your PSU (8 pin and 24 pin, 2 different slots)
boot back up
.......take note of what led's are on in trhe motherboard and in what order they come on and go off. Your user handbook for the motherboard will identify what these are and if you look closely each are labelled.
Be a lot more specific when listing symptoms. "A few led's on" doesn't really tell us anything"
Is the Motherboard dead.... Answer no, you answered that yourself when you stated that LED's are on.
The LED's are a diagnosis tool, what colour they illuminate , whether they go and and off or stay on tell us a lot