Hello. I am an Italian amateur who from time to time buys a faulty laptop and tries to find the fault and repair it, just for fun. I usually succeed but this time the problem beats me. I bought this laptop which was not showing anything on display. I bought a second-hand mobo and assembled it but the problem persisted. I thought the mobo was faulty and got a refund. With the money I bought a second mobo and assembled it but the problem will not go away. I am writing from Italy. I cannot think that I was sent two different faulty mobos from two different sellers. I cannot get any image not even with an external monitor. I cannot hear any sound coming from the HDD. The power button led lights up and so does the first of three leds placed at the bottom left side of the palmrest. The fan works. It seems very odd to me but I cannot think of anything else but a faulty CPU (but I have tried 3 of them). Has anyone any idea where the defect could be? Thanks a lot and best regards