Intel DZ77BH-55K Technical Product Specification - Page 79
Error Messages and Beep Codes - problems
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4 Error Messages and Beep Codes 4.1 Speaker The board-mounted speaker provides audible error code (beep code) information during POST. For information about The location of the onboard speaker Refer to Figure 1, page 13 4.2 BIOS Beep Codes Whenever a recoverable error occurs during POST, the BIOS causes the board's speaker to beep an error message describing the problem (see Table 43). Table 43. BIOS Beep Codes Type Pattern F2 Setup/F10 Boot Menu Prompt One 0.5 second beep when BIOS is ready to accept keyboard input BIOS update in progress None Video error On-off (1.0 second each) two times, then 2.5-second pause (off), entire pattern repeats (beeps and pause) once and the BIOS will continue to boot. Memory error On-off (1.0 second each) three times, then 2.5-second pause (off), entire pattern repeats (beeps and pause) until the system is powered off. Thermal trip warning Alternate high and low beeps (1.0 second each) for 8 beeps, followed by system shut down. Frequency 932 Hz 932 Hz When no VGA option ROM is found. 932 Hz High beep 2000 Hz Low beep 1500 Hz 79