I've just done my first custom build. Everything looks like it powers on fine (the heatsink fan spins and the motherboard light is on). The problem is after switch on there's 3 beeps, 1 long 2 short. There's also no video signal to the monitor from either the on board graphics or the dedicated card. At first after some google searching I thought it might be down to bad ram. So I replaced the Corsair 4gb ram for some Kingston 4gb ram that was on the motherboards compatibility list, same result. Now I think I've narrowed it down to a CPU/Motherboard issue. If I remove the CPU and boot up there's no beeping. Still there's no video signal, though. So I can't tell if it's down to a faulty Motherboard, CPU or graphics card. Or even something else...
Any idea where the problem lies?
AMD Athlon II X3 450 AM3
Sapphire HD5450 1GB DDR3
Kingston 4GB 1333MHz DDR3
CIT 550w Silent ATX Power Supply
Any help appreciated!