having a constant beeping sound ,tried new memory & graphics card but it is still there. havent a clue.
I'm afraid we are going to need more info than that! What are your system specs? This includes the motherboard, RAM, video card, PSU, CD/DVD drives and any other peripheral cards you may have. What else have you done to rectify the problem? And most important is what are the sequence of beeps and what BIOS version does the motherboard use?
Pelvis_3 is right, we need more information then that. Constant long beeps is normally a memory failure, or no memory detected. Make sure the first RAM slot (nearest the CPU) is occupied with a stick of RAM