If you can't  boot in Safe Mode, you're really stuck.
Try a startup repair:
http://www.bleepingcomputer.com/tutorials/tutorial148.html

-------- Original Message --------
Subject: [PCBUILD] HP Pav. laptop dv4-1140go near dark screen
From: J Bourvic <[log in to unmask]>
Date: Mon, February 15, 2010 11:08 pm
To: [log in to unmask]

Windows Vista 64 bit system with 4 GB memory and a 350 GB HDD. Computer 
had been working fine. Turned it on yesterday morning and it sat there 
for about 1 hour - no one noticed that it almost had no screen. My 
daughter wanted to use it and she was complaining that it was very slow!

When I looked at it, I tried forcing a shutdown and then restarting. A 
"Windows was shut down improperly" DOS message screen appeared and 
offered to start normally, in Safe Mode, in SM w/Networking or SM 
w/Command Prompt. I tried the three versions of safe mode and this is 
what I got: an HP invent logo appeared in the center of the screen and a

DOS text message appeared in the lower left corner (I assume that this 
means the display is not dead). Next a scrolling list of files that are 
being loaded pass by with the last on being 
windows\system32\drivers\crcdisk.sys. The the screen goes near dark and 
the only thing displaying is a slightly oversize cursor arrow. There are

no beeps, no caps-lock lights flashing code (supposed to indicate a post

error) or anything. The hard drive led shows activity for almost 8 
minutes after. There is no inkling of any color on the display 
whatsoever. Just arbitrarily typing in the log-in code doesn't do 
anything. Anyone have any ideas?

Jean Bourvic

 PCBUILD's List Owners:
 Bob Wright<[log in to unmask]>
 Mark Rode<[log in to unmask]>

                         PCBUILD's List Owners:
                      Bob Wright<[log in to unmask]>
                        Mark Rode<[log in to unmask]>