Four main possible causes: First, it's worth trying a reset: If the same thing occurs, then it's a process of elimination to figure out where the problem lies, or at least where it doesn't lie. For example, if your AC adapter is recognized and works on another Dell laptop, then the problem is likely your charging jack or charging circuit. Check if the light is lit at the plug end of the AC adaptor. And see if that light remains lit when you plug it into the laptop's jack. Hold F2 while booting, to enter BIOS. See if the AC adaptor is recognized. Try another genuine Dell AC adapter of at least the same wattage/amperage. If that second Dell AC adapter works, then the fault is likely with your AC adapter. If it doesn't work, then the fault is likely with the jack or the circuit. The jack is a relatively inexpensive item that is not difficult to replace for someone experienced in working on laptops. If a good AC adapter and a new jack won't work, then the fault is likely with the charging circuit on the motherboard, which would normally require replacement of the motherboard. Run Dell Diagnostics:Press and hold F12 while booting to enter the One Time Boot Menu, select Diagnostics and press Enter. The Dell Diagnostics will test major hardware components.
Hello. This is my used E6540 Latitude laptop. Why does this screen show up every time I turn on the laptop? [IMAGE]
DELL Latitude E6540 battery and AC adapter issue!