Answer to "My laptop screen goes blank after powering it in"Laptop screen blink could be bad Hall effect sensor all the way to bad LCD cable or backlight power supply. Haier are not known for quality anything, so I am not sure why anyone is buying these things, but ok. :)
Answer to "How to Replace the PCV Diaphragm on a Volvo V50 2006?"PCV valves are usually really simple across all vehicles. They just pop out usually from the valve cover and detach from the pcv hose, and just pop another one in. Do not forget to take a bit of engine oil and lube the pcv o-ring before trying to reseat the new one or you will damage the o-ring.