|Don't worry about taking RAM out for starters. |
It is what's called volatile memory which means that once the stored charge is released all information on the RAM will be lost.
First try removing all power sources, the battery and the power cable and pressing and holding the power button for a few seconds. Won't hurt to press and hold the power button a couple of times. The reconnect everything and see if you can get the laptop to boot up.
If the RAM was the reason for the laptop failing to boot you would normally get a series of beeps when you try to turn it on. Do you hear any beeps?
Also are there any noises coming from the laptop when you try to power it on? Do you hear fans? Do you hear any clicking sounds coming from the computer if you put your ear up to it? Are there any lights on the laptop that fail to glow? The problem could possibly be a faulty power supply.