Hp Pavilion DV7-1232nr Black Screen Caps lock flashing
This laptop had a bad power supply. The owner continued to use the ac adapter and i suppose they blew the mobo or cpu. I have used the link below to attempt to troubleshoot. My guess would be the cpu was shorted due to the faulty power supply - the owner didn't notice sparks flying off the ac adapter!
anyhow, when i power on the notebook, nothing shows on the screen and the cap locks and number locks flash continuously with short pauses between each blink - maybe 2 or 3 seconds between each blink. But it does this infinitely untill i power off the machine.