How to get touch screen on dell latitude e6400?

SOURCE: My Dell latitude E6400 does not power on

Try memory modules individually. See if any change.
Also post whether the Lock LEDs are solid or flashing

SOURCE: wireless connection Dell Latitude E6400

Look for a switch that turns on the wireless device. Also check in the connection manager if the device is active and the wireless adapter is within range.

SOURCE: dell latitude e6400 hard drive failures - is this

have you tested the hdd? i believed dell system has quick test for ram and hdd. try this one, turn off system, press and hold on the Fn key then press once the power button while holding the Fn key. a quick test will appear to check the integrity of the hdd. if the hdd failure after the dell logo then like msgs such as no device found just try to reseat the hdd. this will not void your warranty since the hdd is a customer replaceable unit according to dell terms.

SOURCE: my radio switch on my Dell latitude e6400

start, the control panel, then network connections, then right click then enable the one you use

SOURCE: Wireless on my Dell Latitude E6400 switched off

Press on F2 when turning back the laptop by going to the BIOS setup screen and from there have to enable your WIRELESS CONNECTION. And then have to manually TURN ON your WIRELESS device by enabling or turning ON the Wireless button of the laptop. Thank you.