After having my laptop for over 2 years, it started getting a black screen at startup with the HDD and Wifi lights not showing. The laptop had overheated the week before and would randomly work at startup at times and show a black screen the majority of the others. I have already tried taking out the battery and holding the power button, hooking it up to a external monitor with no luck with only another black screen, and using a flashdrive to get another bios, all with no help. My work is on this computer and I really need it to work by Friday. Any help would be greatly appreciated.
Before you do anything else you should pull the drive and copy the data you need off it.
It sounds as if it's locking before it has even started POST, so any fix is not going to be easy. Since it was sporadically getting past POST, I might guess it's a motherboard issue. Voltage regulation maybe.
It's not going going through POST or showing the BIOS screen. I power the laptop on, but the screen remains black without any shift in color showing the screen works. Also the temperatures seem normal at an average of 75C idle.