RE: Dell laptop memory install Prpoblem
I remember once when I upgraded one of the RAM sticks in my laptop it didnt boot as well. And then I switched the location of the two (made sure the original OEM stick was in slot 1, and new ram in slot 2), the system booted up and read the memory just fine. I've had the same problem with two other friends laptops (compaqs this time), and a third friend (I think it was a hp or compaq as well back when they were seperate) which it would not boot unless we purchased the original ones that come with the laptop (expensive if you get them from the manufacturer of the laptop, but picked it up for fairly cheap on ebay)
Sometimes laptops, and desktops, are tied to certain RAM sticks. You have to get certain brands sometimes, sometimes you have to get OEM only, and so on.
Have you tried using one at a time? have you tried using one new and one old? Which dell do you have? Also when you say it doesn't boot, does it post atleast or go to the dell screen at least?
sometimes a simple BIOS upgrade helps but I do not recommend unless you feel comfortable doing a bios flash upgrade, keep in mind a bad bios flash can just make your laptop a HUGE paper weight.