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  1. #1
    Silver Lounger
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    Problems with screen after reboot/boot (Home/SP2)

    Well, this is another one of those problems that can be hard to find the cause, let's see if the Lounge can help.

    Sometimes when I reboot the PC in question (Start>Turn Off Computer>Restart), it reboots OK, I can see BIOS POST (or in my case an Asus logo), I see Windows load indicator, but instead of Welcome Screen (or Desktop) next is a "scattered display". The screen is a mess of coloured dots, BUT mouse cursor is working (and PC has not hanged). So when I move the cursor around this mess of dots I can find the link in left corner of Welcome Screen to reboot the machine or turn it off.

    There is a second version of this; after POST or Windows load indicator a completely black screen. This one is a hang, since Caps Lock on keyboard isn't working, Num Lock light goes out after some shifts. If I wait for some time and at last press the reboot button on PC case, I, after reboot get the Windows "black screen" with options for Safe Mode, Last known good, Normal Mode etc.

    In both above cases, and sometimes even when loading OK, during the Windows load indicator screen there is a short "flicker", I don't know how to describe this since English isn't my native language, but most of the time the lower part of the screen (load indicator) gets sliced and jumps, then goes back to looking normal.

    After I built this PC 3 months ago I did a test installation and ran it one week. Mostly to test different tools and drivers that came with the new hardware, to know what I later wanted to install. During that period I used the Nvidia driver from vendor on CD, Forceware 84.21 WHQL from March this year. When thinking about it, I can't recall that I did see this behaviour then. At final install I, however, chose the later 91.47.

    On this PC there has been very few programs installed. On the other hand I saw case 1 from above on the second day after install during update installation. I don't use MU/WU, in this case patches was/is installed from HD. After installation of 913580 (number 31 of 46 updates that day!) and following reboot, the screen looked like case 1. After some reboot to Safe Mode etc. etc. (this is 3 months ago, can't remember everything) it looked OK in Normal Mode. I thought this was a one time glitch at the time, especially since it was a massive update install and at this point 3-5 reboots following each other.

    I cannot see any pattern; some hours before a reboot today, I installed an old non-security patch, 920872, for audio related files. The forced reboot went OK, but a later reboot didn't (case 2). This is an old patch, and there hasn't been any issues related to it in this context. Some have had other problems with it, but not related to this.

    What could cause this? Can it be related to graphic drivers? Today I was actually preparing the PC for some new software (WMP11, etc.), but instead have to decide if I'm going to uninstall Forceware 91.47 and go back to 84.21, or even hope it works better with the latest 93.71. But then again, every driver has some non-solved issues. Then also decide if to use some driver cleaner software, or if it's OK to follow Nvidia's advice and just uninstall ... sigh.

    Nothing found in Event Viewer.

    Any help & comments is appreciated.

  2. #2
    Plutonium Lounger Leif's Avatar
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    Re: Problems with screen after reboot/boot (Home/S

    What happens if you turn off, wait for (say) 10 seconds, then restart?

    (Probably not an easy question to answer if it is a random fault...)

  3. #3
    Silver Lounger
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    Re: Problems with screen after reboot/boot (Home/S

    Leif,
    I don't know. Turn off sounds easy, but if one can chose, I would normally not just press and hold the power button. In case 1, working cursor but nothing else, then I can select Restart, and in most cases the next boot is normal. Can't remember if I have ever chosen Turn off in case 1.

    In case 2, the PC has hanged or at least black screen and keyboard not working. In this case pressing reboot button results in Windows "black screen" with options Safe Mode/Last Known Good/Normal Mode etc. If I don't press reboot button in case 2, but press power button 3-4 seconds to turn off, I guess I'll see Windows "black screen" the next time I turn on PC, since no normal start.

    Are you thinking about heat related problems?

  4. #4
    Plutonium Lounger Leif's Avatar
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    Re: Problems with screen after reboot/boot (Home/S

    Not sure what I'm thinking about actually <img src=/S/laugh.gif border=0 alt=laugh width=15 height=15>

    Have you run a full chkdsk of the boot drive?

    Can you try a different monitor? What happens if you unplug the monitor and plug it back in when the display is bad?

  5. #5
    Silver Lounger
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    Re: Problems with screen after reboot/boot (Home/S

    "Not sure what I'm thinking about actually" <img src=/S/yikes.gif border=0 alt=yikes width=15 height=15> Leif is not thinking! <img src=/S/laugh.gif border=0 alt=laugh width=15 height=15>

    Thanks for your comments! Well, this PC is quite virgin in many aspects, there are many things I have not run on it or done since the build (obviously: it is updated with everything; OS, programs, AV etc. and I have run defrag and some other tools). So, no I have not run any chkdsk yet. Maybe should.

    I have had 3 fine months, without an error, then I installed Real Alternative and it gives me an error almost every time I close a streaming session, filling my application log. <img src=/S/groan.gif border=0 alt=groan width=16 height=15> But now I've installed the latest WMP, HA! so no more RA for a while (since many of my preferred sites use WM/changed to WM). Sorry, had to rant a little after some bad days with RA.

    Yesterday I installed the latest graphic drivers for my card, this is what happened:

    PC is running fine and stable, did some preparation, cleaning cache files, some temp files etc. Then I uninstalled the Nvidia 91.47 drivers. This prompted a reboot, that went OK.

    After the reboot I started the install of Nvidia 93.71 drivers. This went OK, I was prompted that to finish the install I had to reboot. The default check is "not to reboot now", so one can finish whatever one likes. After installation I just looked at some items on start menu, then selected Log off>Restart.

    Oh dear: after reboot, black screen. Keyboard not working. Wait, then I turned off with button. Waits some minute, power on, oh dear, black screen again. The change of drivers was supposed to help, not exactly what one wants during an installation reboot.

    Now at the second black screen I press the reboot button, and since I did that, I get the Windows "black screen" with options: Safe Mode etc.

    I chose Safe Mode, it starts OK but stops with a blinking cursor top left (maybe I now should have waited some more minutes, but) I pressed reboot button once more, back to "black screen" with options: Safe Mode again.

    This time Safe Mode works OK. I take a look at everything, remembering that there yet hasn't been any successful boot to Normal Mode after installation. At the Device Manager, with the "non_present variable" in use, I find two monitors (same details/drivers), see screen shot. I remove both entries, and then log off and restarts.

    Normal Mode boot is OK. Only one monitor in DM, correctly identified. Have to adjust screen resolution and frequency, as expected. Seems stable and OK. Later another reboot to Normal Mode is OK, but the text on the Windows load screen is "jumping" for a short time.

    Have no other working monitor around to test with. Could maybe do a check of "cables and connections".

    Again, thanks for comments.

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