An Ubuntu install smashed my HP Compaq 8510w built-in LCD display and presumably the firmware/BIOS.
I did an install a while ago of Lubuntu 12.10 - somewhere in the process, my laptop display started flickering, and went black.
I could use the PC with an external VGA monitor, when the lid was closed.
An installation of Fedora 18 and NVIDIA binary drivers cured the flickering display, and I could use both displays again.
I decided trying a fresh Ubuntu 12.10 install - the nouveau drivers for NVIDIA made my display flicker and shut down again; this happened during installation.
After a reboot, I could not turn on the PC, the hard drive LED just blinks - perhaps some firmware/microcode was flashed - I don't know.
I have removed the battery, performed a 15 seconds power button press while off AC and battery power, as the HP support webpages recommends -but the Notebook seems permanently unable to start.... the hard drive LED just blinks.