Chosen Solution
The laptop displays on its MONITOR only when an external VGA monitor is connected. Otherwise, it emits 8 beeps, waits for about then 8 beeps again after about 3 seconds. On its display, it shows a blinking cursor while beeping.
mmachofa, eight beeps means it is a display/LCD failure. Since your computer works with an external, you already know it’s not a video card error. Try to hold down the “D” key and power the laptop on. If you get solid colors on the screen, then you know the LCD is working as well, then check for a problem with the LVDS cable. If you do not get anything on your screen, it may be time to replace the LCD. Hope this helps, good luck.
You are in quite and interesting predicament. It is already unusual for a laptop to run dual display at the BIOS (dual display usually initializes once the operating system starts). The beeps do usually indicate a display problem is present, but I do believe that oldturkey03 is on to something. The first thing I would try is reconnecting the cable that connects the LCD display to the motherboard. It is possible that it something has come loose in the laptop and is causing it to ground out the system. Good luck!
