I was attempting to add ram to my acer 5742. I opened the back replaced the old ram with new apparatus, but when I attempted to start the computer it would not respond. I could see the blue start up light come on and hear the fan, but the screen did not come on. When installing the new ram I didn't remove the battery. Can you help me?
see if the backlight went bad or your running on the ext video port and not the lcd. try connection the laptop to a monitor and see if anything comes on the monitor. you may have to use one of the f keys to turn the vga port on. if nothing comes on pull the battery and ac power and see if there a key stokes or a jumper to reset the mb.