RE: [Need urgent help] Dell latitude e6420 screen blank
Please run diagnostic tool to check the hardware on the system by following steps below:
1. Power off system
2. Power on system, quickly tap the F12 key continuously until you see Preparing one time boot menu in the top right corner of the screen. In the boot menu, stroll down to Diagnostic and then click it. After quick tests, click on hard drive and then Thorough Test Mode. Do same for Memory. Report back any error code.