Why does my screen go black after the Windows screen when I boot?

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hi,

im having a serious issue with my pc and i dont know what to do next expect throw my pc through the window. I have XP pro with 2gb ram and 2.4ghz pentium and a quadro 700 agp card. i installed another card (quadro 230) to get dual screens, and after installing the driver and rebooting, my pc went dead. When i say dead i mean that the pc boots up to Dell screen, the window splash screen for 10 seconds, and then the screen goes blank (dark) when the desktop should load. i waited 10, 20 mns but no change.
I can hear things happening, or access the shared directories on my desktop by using my laptop, but i cant see anything on my screen. i can even hit the keys to shut the pc down without seeing them (i remember them) and the pc turns off. so i guess the PC is ok, but the visuals are gone...or semi gone since i can see the boot up and window splash screen.
ive tried changing the graphics card, changing screen, running recovery console chkdsk /r, fixboot and fixmbr or even booting to safe mode, with no success. When i try to go to safe mode, or last config, or any other choice, it stops at iomsys. I tried disabling this service in the recovery console, but that didnt work..in fact, i would auto reboot without going anywhere.

HELPPPPPPPPP!!!!!!

I'm having a weird problem - similar to this. After the Windows screen pops up on start-up my screen goes black for several minutes and finally goes to the Windows user page. This never happened before - what changed and how do I fix it

Thanks

hi i'm having a weird problem. First when i boot my computer it goes to the windows logo. Then it goes black...The way i got around this is to simply reboot my compuer and 1 out of 5 or 6 times it actually lets me into the system. Now that worked for me thus far. I even lowerd my resolution and color like stated above but that didn't do much of a difrence. Now when i try to boot in safe mode it simply puts bunc of petition this and that mostly related to my hardware and then it stops. It goes no fruther, so safe mode does not work for me. So now when i boot up my computer it goes to the windows logo and then a black screen aobut couple minutes later it displays a blue screen and then it restarts again doing the same thing over and over.

i'm thinking the constatns shut downs will damage my computer sooner then later. But now the only way i can get around this problem is after it shows the blue screen and restarts. I have to boot up in safe mode with comand prompt. It freezes then i turn my computer of and then boot in last good knows configuration, then it lets me in.

However if i try any other method it will do show the black then blue then restart.

This is not a good way of getting into my system and i'm afraid that i will damage my cmoputer beyond usage.

Obviously the problem is going from worse to worse, so any help would be greatly aprichiated.

I have one gig of ram, 3 gig pentium procesor, video card is a geforce fx 5700 plus ultra, and motherboard is an sis 800 i think.

HI
I tried method 2 numerous times but to no avail. I can't get to boot in safe mode or any mode. I inadvertantly disabled the VGA mode and that's when my problems started I don't have any bootable discs available. Can someone tell me how to make a disc? or give me another tip on how to get my system working properly? I have windowsXP sp1 intalled and I can access the computer from another computer.
Thanks

about black screen after resolution change,I can't go into save mode and i tryed the other and still no go. Please help?

K, forget the DVI output, I mean, first i thought the MX 440 AGP card driver was the issue, since only a win 2000 version was accepted by my win xp. and none of the updated drivers were recognizing my card. Upon booting my system, the card is recognized as Nvidia Geforece 4 MX 440 64 mb card.
The plug and play always recognized it as an SIS But then i was told video card. the problem here is in both of the above cases i never got the output settings options in the advanced section of the display properties.
But i found out that maybe it is a fake card which is actually an sis card. so got the updated sis for win xp, now after the win logon screen the windows comes on a blank screen, can see it boot and log on to windows but windows upon logging on is blank, no desktop.. and now i cant get it back to working screen in windows, also in safe mode it gets stuck in the agp440.sys, NEED HELP GUYS!

I had the same problem with a Windows Vista RC2 notebook today. Black screen after boot up; just the mouse cursor visibility/functionality was enable. After several unsuscessful tries to boot up in the different save modes, and loading defaults in the BIOS; I converted an WINXP C: drive to USB and plugged it in, changed the boot up to USB hard drive in the BIOS. This time windows bootup gave me an option to boot to a "known good configuration", I chose that and voila! everything is working fine. I don't have any idea what happened before it went bad, only thing I know is that the computer was in sleep mode before it happened.

Also experiencing blank screen problem. When I try to access amy of the safe modes, the process stops at the line "multi(0)disk(0)rdisk(0)partition(1)\WINDOWS\system32\DRIVERS\agp440.sys" and then doesn't go any further no matter how long I wait. I seriously have no clue to what happens after this.

My computer will load to the initial windows logo with the loading bar, then reboot on it's own. I've tried starting in safe mode and lots of data is displayed on the screen, then it locks up and eventually reboots again.

HELP!

I have an old PIII machine that was woking ok with WXP home edition SP2, and 384 MB RAM. One day I was working with a word doc, and it started to shut down, and after that moment It wont boot. It does not boot even in safe mode. It start to load all drivers, and 5 secs after loading AGP440 it goes black, and freezes. Any help? (No recovery console, but anyway i cannot even get to that stage). I have read all about the problems of SP2 and AGP440, but i was working ok before, so it does not looks like this is the problem. I desasembled the machine and cleaned it without results. might that be HW problem? where to start?

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