I bought an Alienware 18 off of eBay that was not working and I am trying to figure out what I need to get it working. Currently, when you try to power it on it doesn't do anything, no lights, no fans, no screen backlight, no beeps. I have tried unplugging it, taking the battery and CMOS battery out, hold the power button for 30 seconds etc. still doesn't work. I also tried the steps found in this thread. http://forum.notebookreview.com/threads/how-to-reset-the-bios-if-one-runs-into-no-post-with-a-messed-up-bios.735514/ The power adapter powers up other computers, so that seems good. I also measured the voltage on the motherboard and it is 19.1 volts. So everything seems good. I am thinking the motherboard is bad and I need to order another one, but before I did that I wanted to see if there was anything else to check/do. Any help would be greatly appreciated.