Bought a laptop Compaq nc 6220 with problems. It is not loaded. Writes, " no disc or disc error". I can not enter the BIOS by conventional methods. I carried her laptop in the studio, the master checked the hard drive, and said that he was okay. He was able to go into the Bios, somehow complicated method. I asked the experts, no one knows how to do it. Ask for advice - how do I enter the Bios?He sat battery Bios.