|You can download the manual here:|
According to it a 'long beeps in an endless loop" means 'no dram installed or detected'.
So, do you have the ram sticks installed? If so, are they the ones that you were using when the motherboard was working OK? Did you remove them, swap them or do anything with them between the last time it worked OK and the first time it didn't?
Are the ram slots clean and the sticks firmly installed?
You're not really green until you're soylent green.