1) One Short Beep Sound During Boot-up; --System check is okay and no problem found. 2) Long Beeps Every Other Second; -- It means no DRAM detected by the system or DRAM is not installed. 3) One Long Beep Followed By Two Short Beeps; -- It means video card memory is bad or video card cannot recognize by the system. 4) High-Low Siren Sound; -- It means CPU is over-heated and system will shut down automatically to protect the CPU.
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