I have this Dell inspiron N5030 laptop that a customer brought to me that she had spilled water on it. She traded it for another one that I had for sale. So I purchased a new motherboard & keyboard and the laptop ran perfect for a couple of days and then suddenly when I wanted to start it up to let a customer look at it, the screen would not come on. I then purchased a new screen cable to see if that would fix it.
In the mean-time another customer needed a screen for his laptop so I robbed the screen from this one to get him going and ordered a new screen for this laptop. So now this Dell in question has a new motherboard, new keyboard, new cable, & a new screen.
It still has the same issue. Intermittently, the screen will not come on when I turn on the laptop and if I turn it off and then turn it right back on the screen comes on fine. This only happens when the charger is not plugged in. When the charger is plugged the screen comes on every time.
Could the battery be the cause of this? I have already did a BIOS update but that did no good.