Home System FAILURE at boot

Motherboard msi kt4v won’t start. Blue screen at start up. At reset began rapid long & short beeping. Powered down for a short time and tried resetting the bios did not think to count the number of beeps as I thought it would be repeated but it did not. Now when powered up hard drive and lan lights light up but nothing happens – no beeping no nothing. However, not completely dead – when removing ram gives memory error beeps. Any help would be appreciated – don’t want to throw a bunch of money away replacing the wrong parts. This an about 5 year old board and cpu but recently purchased new vid card and hard drive and would prefer to not have to get entirely new setup.