I turn on the PC it connects, more does not make the beeps test, and not much happens

People today when I turn on the pc it happened I pressed the button to turn on, then he made the noise of the cooler ligand, made noise in the driver DVD and CD, so it did not do those noises of beeps tests and do not mind, I turn it over the monitor, the speaker the mouse all the peripherals And the pc does not care anything then I reninciei him by another little button so that there is not renincio tabm then I apaetei the button that connects him for a while off, and off, so I was trying to connect again and gave him the same thing, it beeps and nothing of the call, so that then I had to leave, and now my little I turn on my little brother pc again and it worked and he said he made the beeps normal care normal, so that when opened the windows screen said it appeared that a screen to send error report and sending it so he does not remember what I was writing it which may have been that? the configuration of my pc is this: Processor AMD Sempron , 1500 MHz (9 x 167) 2200 + PCChips M825G Motherboard RAM 735 1x256 1x512 40GB HD NOTE: My PC has more than 5 years: P --- Probably your memory is having problems, call one at a time to see what is bad. Try to pass a "rubber" (even those white college ") and see if the connectors solves. --- huh is right, I forgot that, once the PC has even more problems in memory and decided I limpeeii