Hi this is from the manual
If the power light is off — The computer is
either turned off or is not receiving power.
• Reseat the power cable into both the
power connector on the computer and the
• If the computer is plugged into a power strip,
ensure that the power strip is plugged into
an electrical outlet and that the power strip
is turned on. Also temporarily bypass power
protection devices, power strips, and power
extension cables to verify that the computer
turns on properly.
• Ensure that the electrical outlet is working
by testing it with another device, such as a
• Check the AC adapter cable connections. If
the AC adapter has a light, ensure that the
light on the AC adapter is on.
If the power light is solid white and the
computer is not responding — The display may
not be connected or powered on. Ensure that
the display is properly connected and then turn
it off then back on.
If the power light is blinking white — The
computer is in standby mode. Press a key on the
keyboard, move the pointer on the trackpad or a
connected mouse, or press the power button to
resume normal operation.
If the power light is solid amber — The
computer has a power problem or an internal
device malfunction. For assistance contact Dell,
see “Contacting Dell” on page 50.
If the power light is blinking amber — The
computer is receiving electrical power, but a
device might be malfunctioning or incorrectly
installed. You may have to remove and then
reinstall the memory modules (for information on
removing and replacing memory modules, see
the Service Manual on the Dell Support website
section 2 page 28 here https://support.dell.com/support/edoc...Y465HA01MR.pdf