Hello. I'm trying to fix a Dell Latitude E5440. At first, I saw no display, but the lights would turn on. I connected it to a tv to test if just the display is bad, but I got no signal. I then took out the one RAM stick and put it in other slot. The laptop turned on fine. I ran Windows memory diagnostic tool and it detected no errors. I did not run the extended one. I wanted to get 2nd opinion of memtest86 and made a USB. When I shut down the laptop, it went back to how it was of not turning on. I noticed the fan on bottom spins for a bit, but stops.
Should I buy another RAM stick, or is the fan not spinning all the time the problem? My guess is it can't be heat problem if the laptop turned on fine and ran the memory diagnostic tool fine? It also wasn't used for a day and didn't work when I first tried to turn it on, so it was cool. It only worked when I moved the RAM. Could it be motherboard issue or even CPU? I tried both plugged into wall and with battery. Thank you.
Should I buy another RAM stick, or is the fan not spinning all the time the problem? My guess is it can't be heat problem if the laptop turned on fine and ran the memory diagnostic tool fine? It also wasn't used for a day and didn't work when I first tried to turn it on, so it was cool. It only worked when I moved the RAM. Could it be motherboard issue or even CPU? I tried both plugged into wall and with battery. Thank you.