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1) Switch the system on. Can you tell me if the power button is flashing amber or a solid amber? Please also tell me if you notice any diagnostics LEDs staying lit - these are labelled 1,2,3 and 4 and are near the front headphone sockets 2) Please remove all peripherals at the back of the system and switch the system on. Does this affect the power button LED or diagnostic LEDs 3) Have you added any components to the system e.g. video cards, sound cards etc... 4) Please open the system and remove the following components: a) Power and data cables from hard drives and optical drivesb) Any PCI/PCI-Express expansion cardsc) All memory from the systemd) The system fan 5) With the above removed, please reconnect the power cord to the back of the system and switch the system on. Please make a note of what happens with the power button LED and the diagnostic LEDs 6) If there are no changes to the power button LED or diagnostic LEDs, please remove the power cord from the back of the system and remove the following components: a) I/O panel cableb) CMOS battery 7) With the I/O panel cable and CMOS battery removed, please connect the power cord to the back of the system. The system should automatically try to switch on. Do you hear any beeps from the system? If so, can you tell us exactly what you hear?
If you need any assistance with removing these components, please see the User Manual here: http://support.euro.dell.com/support/edocs/systems/op380/en/index.htm
Please keep us updated on how you get on!
Since that isn't one of the listed codes, it is important to see what the POWER LED indicates.
If it is Flashing Amber, most likely a bad power supply
If power LED is solid amber, then either the motherboard, or a expansion card in the motherboard has failed. Remove any expansion cards, (Modem, sound or video card) try booting again.
If no Change then a motherboard
Power led on the front of the tower, it should be solid green when on. Flashing Amber is generally an indication of a bad power supply inside the tower
Power LED Solid AMBER indicates system is not finishing the power on self test (POST) and you remove all connections from the tower except power and try turning on again. If no change, remove all PCI and PCI-E cards from system, try again, no change replace motherboard.
On the back of the tower are 4 diagnostic LEDs near the ps2 ports marked ABCD, after the POST, during a normal boot the will flash in several sequences and with boot is finished all 4 should be green. If they stop an a different pattern, then that indicates a failure Yellow Yellow Green Green indicate bad RAM for example
If the LEDs on front and back are Green then the system appears to be booting but the monitor display is not functional