The notebook reveived an impact during work and turned immediately off. Pressing the on-switch had no effects afterwards. The LED on the power supply extinguishes when it is connected to the notebook, so I assume a kind of short circuit in the Inspirion. I disassembled the mainboard and all components on it and plugged in the power supply with the same reaction as before. Inspection of the mainboard with a magnifying glass showed me no cracks on the PCB or soldering points. Can I assume, that at least the mainboared is dead? Is there any hope to repair the mainboard?