Dell E5440 no boot and disk led blinking

[PainThonNen]

Hello guys how are you?

I'm facing a Dell E5440 who don't to boot. When I push the power button, the power shows up for some seconds and goes down. After that, wireless and battery led show up (solid white) and the disk led start flashing. No short to ground detected, Tried to flash both U1 et U2 but nothing.

Thank you for any help

[jake-b]

good morning,
i have dell e6540's and not e5440's so your mileage may vary. on the e6540 you can interrupt the boot process by pressing the f12 key after the power key and you will see an option on the resulting menu to run a pre-boot system assessment. it is a comprehensive hardware diagnostic. another option in the e6540 is to hold the "fn" key when powering on which runs hardware tests and produces a combination of led lights that identify possible hardware issues. the led combinations are defined in a table in the users manual. i didn't see the table of codes in the e5440 manual so that capability may not exist on a e5440 but if it does there is a table that maps combinations of leds (disk-battery-wireless) to possible system errors in the e6540 manual on page 54. hope those tests are of some use and best of luck in resolving.