my pc display a small message as this"Press Esc to Skip Test Memory"
comment my key board in this moment dont work
You probably have a USB keyboard - ideally you need to try a PS2 keyboard which will work from the start. Then access the BIOS/SETUP and check that 'USB legacy' device is enabled, then your USB keyboard should work. If it still doesn't than you may have an old(ish) pc which doesn't support USB at boot. "I've always been mad, I know I've been mad, like the most of us..."
It also helps if the USB keyboard is plugged directly to one of the rear USB ports directly on the motherboard, NOT a front one or any using an expansion card or a hub.
the keyboard is correctly pluged but either RAM OR it's slot may be is Infected because when Im try removing the ram and insert it again may be correctly booting
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