My computer is Pentium II using windows 98 I recently open the box and try to adjust the memory, then all the sudden , by the next time i try to turn on again and it fails to turn on can't see anything on the monitor, and I keep hearing some loud beeping noise continuously beeping when I turn the computer on , but no active of the keyboard and mouse and nothing is gone thru except it stops ... right there! is the something wrong with the motherbroard or ???? please Help I am really appreciated... thanks in advance!