Good night guys; I tell you; I have a bangho b240 xhu notebook; The team arrives at the workshop originally because of the sudden blackouts it suffered while it was being used. a complete hardware maintenance service was done, including thermal paste change and complete cleaning, the equipment continues to shut down. I will tell you a detail that I noticed in the notebook; the client tells me that he uses it with a connected headset cable because when not connected it makes a constant beep in the speakers and never stops; we check it in the workshop and detect a short usb port, which we remove from the board; When the beep is turned on, the PC switches off connected by charger and using the battery, even using the battery independently or connected by the charger without the battery. In addition to this; We notice that the equipment when it is turned off, if we connect the battery or the charger turns on alone; no need to press the power button: .. If anyone can give me any advice I would appreciate it. thank you ; regards