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Table 15. BIOS Beep Codes Type Pattern Frequency/Comments F2 Setup/F10 Boot Menu Prompt One 0.5 second beep when the BIOS is ready to accept keyboard input 932 Hz BIOS update in progress None Video error (no add- in graphics card installed) On-off (1.0 second each) two times, then a 2.5-second pause (off), the entire pattern repeats (beeps and pause) once and the BIOS will continue to boot. 932 Hz For processors requiring an add-in graphics card Memory error On-off (1.0 second each) three times, then a 2.5-second pause (off), the entire pattern repeats (beeps and pause) until the system is powered off. 932 Hz Thermal trip warning Alternate high and low beeps (1.0 second each) for eight beeps followed by system shut down. High beep 2000 Hz Low beep 1500 Hz Intel Desktop Board DH55TC Product Guide Table 16. Front-panel Power LED Blink Codes Type Pattern Note F2 Setup/F10 Boot Menu Prompt None BIOS update in progress Off when the update begins, then on for 0.5 seconds, then off for 0.5 seconds. The pattern repeats until the BIOS update is complete. Video error (no add- in graphics card installed) On-off (1.0 second each) two times, then a 2.5-second pause (off), the entire pattern repeats (blink and pause) until the system is powered off. For processors requiring an add-in graphics card Memory error On-off (1.0 second each) three times, then a 2.5-second pause (off), the entire pattern repeats (blinks and pause) until the system is powered off. Thermal trip warning Each beep will be accompanied by the following blink pattern: .25 seconds on, .25 seconds off, .25 seconds on, .25 seconds off. This results in a total of 16 blinks. BIOS Error Messages When a recoverable error occurs during the POST, the BIOS displays an error message describing the problem. Table 17 gives an explanation of the BIOS error messages. Table 17. BIOS Error Messages Error Message Explanation CMOS Battery Low The battery may be losing power. Replace the battery soon. CMOS Checksum Bad The CMOS checksum is incorrect. CMOS memory may have been corrupted. Run Setup to reset values. Memory Size Decreased Memory size has decreased since the last boot. If no memory was removed, then memory may be bad. No Boot Device Available System did not find a device to boot. B Regulatory Compliance This appendix contains the following regulatory compliance information for Intel Desktop Board DH55TC: • Safety standards • European Union Declaration of Conformity statement • Product Ecology statements • Electromagnetic Compatibility (EMC) regulations • Product certifications Safety Standards Intel Desktop Board DH55TC complies with the safety standards stated in Table 18 when correctly installed in a compatible host system. Table 18. Safety Standards Regulation Title CSA/UL 60950-1, First Edition Information Technology Equipment – Safety - Part 1: General Requirements (USA and Canada) EN 60950-1:2006, Second Edition Information Technology Equipment – Safety - Part 1: General Requirements (European Union) IEC 60950-1:2005, Second Edition Information Technology Equipment – Safety - Part 1: General Requirements (International) Place Battery Marking There is insufficient space on this Desktop Board to provide instructions for replacing and disposing of the Lithium ion coin cell battery. For system safety certification, the statement below or an equivalent statement is required to be permanently and legibly marked on the chassis near the battery. CAUTION Risk of explosion if the battery is replaced with an incorrect type. Batteries should be recycled where possible. Disposal of used batteries must be in accordance with local environmental regulations. A suitable caution label is included with Intel Desktop Board DH55TC. For information about replacing the battery, go to page 56. Intel Desktop Board DH55TC Product Guide European Union Declaration of Conformity Statement We, Intel Corporation, declare under our sole responsibility that the product Intel® Desktop Board DH55TC is in conformity with all applicable essential requirements necessary for CE marking, following the provisions of the European Council Directives 2004/108/EC (EMC Directive) and 2006/95/EC (Low Voltage Directive). The product is properly CE marked demonstrating this conformity and is for distribution within all member states of the EU with no restrictions. This product follows the provisions of the European Directives 2004/108/EC and 2006/95/EC. Cestina Tento vyrobek odpovida pozadavkum evropskych smernic 2004/108/EC a 2006/95/EC. Dansk Dette produkt er i overensstemmelse med det europ.iske direktiv 2004/108/EC & 2006/95/EC. Dutch Dit product is in navolging van de bepalingen van Europees Directief 2004/108/EC & 2006/95/EC. Eesti Antud toode vastab Euroopa direktiivides 2004/108/EC ja 2006/95/EC kehtestatud nouetele. Suomi Tama tuote noudattaa EU-direktiivin 2004/108/EC & 2006/95/EC maarayksia. Francais Ce produit est conforme aux exigences de la Directive Europeenne 2004/108/EC & 2006/95/EC. D...