Elite book 840 does not turn on. Power, Mute, Wireless and keyboard LEDs Blink (slowly)

[spagangriso]

This morning my (4 years old) elitebook 840 is not turning on. After I press the power button, the power, wireless, Mute and keyboard backlit LEDs Blink. They do one Blink every about 4/5 seconds.
I've tried to do an hard reset unplugging the laptop and keeping the power button pressed for 15 seconds. Still, I get the same behavior after plugging it back to the power adapter and pressing the power button.
I've tried to look up the blinking error codes but I'm not sure the behavior described above is the one expected in that case.
Is there any other debug/attempt I can do on my own? (I'm travelling right now and won't be able to get to an assistance shop before a couple of days very likely).
Thanks!

[spagangriso · Accepted solution]

Problem solved.
The culprit was a faulty RAM module.
It is interesting to note I was not getting the correct blinking of LEDs that should appear when this is the problem. Once I removed one of the RAM module and left only the faulty one then I got that error and leaving only the other module did power on and boot correctly.
I did also test if it was the RAM module or the slot with various combinations and its clearly the RAM module.

[Leo1337]

Dude ! Spot on ! I just had the same issue, you just saved my life, thank you