Dell OptiPlex 7071 Tower Tower Service Manual - Page 89
Table 19. Power LED summary, Table 20. Amber LED blinking failures
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Table 19. Power LED summary Amber LED state White LED state Off Off Off Blinking Previous State Previous State Blinking Off Steady Off Off Steady Table 20. Amber LED blinking failures Amber LED state White LED state 2 1 2 2 2 3 2 4 Table 21. States Under Host BIOS Control Amber LED state White LED state 2 5 2 6 2 7 System state S4, S5 Notes • Hibernate or Suspend to Disk (S4) • Power is off (S5) S1, S3 System is in a low power state, either S1 or S3. This does not indicate a fault condition. S3, no PWRGD_PS S0, no PWRGD_PS This entry provides for the possibility of a delay from SLP_S3# active to PWRGD_PS inactive. Boot Failure - The computer is receiving electrical power, and power supplied by the power supply is normal. A device might be malfunctioning or incorrectly installed. Refer to the table below for Amber Blinking Pattern diagnostics suggestion and possible failures. S0, no PWRGD_PS, Code fetch = 0 Boot Failure - This is a system fault error condition, including the power supply. Only the +5VSB rail on the power supply is working correctly. S0, no PWRGD_PS, Code fetch This indicates that the host = 1 BIOS has started to execute and the LED register is now writable. System state Bad MBD Bad MB, PSU or cabling Bad MBD, DIMMS, or CPU Bad coin cell Notes Bad MBD - Rows A, G, H, and J from table 12.4 of SIO Spec Pre-Post indicators [40] Bad MBD, PSU or PSU cabling Rows B, C and D of table 12.4 SIO spec [40] Bad MBD, DIMMS or CPU Rows F and K from table 12.4 of SIO spec [40] Bad coin cell - Row M of table 12.4 in SIO spec [40] System state BIOS state 1 BIOS state 2 BIOS state 3 Notes BIOS Post code (Old LED pattern 0001) Corrupt BIOS. BIOS Post code (Old LED pattern 0010) CPU config or CPU failure. BIOS Post code (Old LED pattern 0011) MEM config in Troubleshooting 89