Dell OptiPlex 5055 Ryzen APU Tower Owners Manual - Page 80
Table 34. Power LED states continued, Table 35. Diagnostic power LED codes, Power LED light status
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Table 34. Power LED states (continued) Power LED light status Possible cause Troubleshooting steps ● Ensure the display is connected and turned on. ● If the display is connected and turned on, listen for a beep code. NOTE: Amber LED blinking pattern : The pattern is 2 or 3 blinks followed by a short pause then X number of blinks up to 7. The repeated pattern has a long pause inserted in the middle. Example 2,3 = 2 amber blinks, short pause, 3 amber blinks followed by long pause then repeats. Table 35. Diagnostic power LED codes State State Name - - Blinking Amber Pattern Problem Description 2 blinks > short pause > Bad Motherboard 1 blink > long pause > repeats Suggested Resolution Replace the motherboard - - 2 blinks > short pause > Bad Motherboard, If customer can assist 2 blinks > long pause > repeats Power Supply or Power to troubleshoot, narrow Supply cabling down the issue with PSU BIST Test, reseat cable. If nothing works, replace the motherboard, power supply or cabling - - 2 blinks > short pause > Bad Motherboard, If customer can assist Memory or Processor 3 blinks > long pause > repeats to troubleshoot, narrow down the issue by reseating memory and swapping an available known good memory. If nothing works, replace the motherboard, memory or processor - - 2 blinks > short pause > Bad coin cell battery If customer can assist 4 blinks > long pause > repeats to troubleshoot, narrow down the issue by swapping a known good coin cell battery if available. If nothing works, replace the coin cell battery S1 RCM 2 blinks > short pause > BIOS Checksum Failure System is in Recovery 5 blinks > long pause > Mode. repeats Flash latest BIOS version. If problem persists, replace the motherboard 80 Troubleshooting
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