No Video on Dell Inspiron 4150 - Boots only with external ..

Archived from groups: comp.sys.laptops (More info?)

After a little experimenting I was able to trick the laptop into activating
the LCD. I power on the laptop with an external monitor attached. When the
POST screen disappears I detach the monitor. The laptop continues to boot
and then I see the Windows XP startup screen on the LCD. I have no idea why
this works and I have used the same technique on the Inspiron 4100. I wonder
why the POST is preventing the system from using the LCD? I can also do the
same with the built-in diagnostics that you can get to via the F12 key. I
start the diagnostics on the external monitor and then unplug it before it
gets the video tests. When it finally gets to the video tests the LCD screen
comes to life. I am wondering if I should flash the BIOS to an older version
or something. I don't know what else to try.

-Jack

"Jack" <jack_nyc_2k@yahoo.com> wrote in message
news:4gSwc.16081$Yd3.12770@newsread3.news.atl.earthlink.net...
> I have (2) Dell Inspiron laptops (a 4100 and a 4150) that are experiencing
> the same issue. The systems boot only when attached to an external
monitor.
> When the external monitor is removed it powers up, the LCD flashes briefly
> and then it shuts down. Would a failed inverter cause this issue?
> Thanks in advance.
>
>