(1) a short ring: Memory refresh failure.
(2) or two short beeps: memory parity error.
(3) Three short beeps: System basic memory test failed.
(4) Four short beeps: the system clock error.
(5) five short blasts: CPU error.
(6) Six short beeps: Keyboard error.
(7) Seven short beeps: real mode system error, can not enter protected mode.
(8) Eight short beeps: Display memory error.
(9) nine short blasts: Motherboard memory error.
(10) a long three short: memory error.
(11) a long eight short: bad display data cable or video card contacts.
