Solved: Dell Latitude boots into Diagnostic Mode every time
My customer needed his computer repaired. It was a Dell Latitude e6400 that had the following weird symptoms:
- Power button does not work – The power button would not turn the computer on or off
- Computer boots into Diagnostic mode – Every time the computer starts up, it would say “Diagnostic Boot Selected” and try to run through its diagnostics
The only way to turn the computer on and off was to unplug it.
After removing the hard drive, RAM sticks and keyboard then unplugging the CMOS battery, the computer still did the same thing. As it turned out the simplest fix worked.
Let the diagnostics start, hit escape when it’s available and tell the computer to reboot, quickly start hitting the F2 key to get into BIOS setup. Once in BIOS, click the “Load Defaults” button, Apply, exit, reboot. This fixed my problem, I hope it fixes yours.