When turning on my laptop, only black screen appears
I have Samsung NP350V5C-A03AE laptop. When turning it on, only black screen appears. After trying to disconnect it from power source and turning it on again for several times, it will boot and work normal after around 15mins from turning it on.
I tried to reset BIOS. Disconnect battery, memory, DVD drive, Hard Drive, Wifi adapter, Keybord one by one and cleaned CPU fan, but nothing happened.
Can anyone help me to fix the issue?