Re-occuring Black Screen - HP Pavilion a6700F desktop

We have an HP Pavilion a6700F desktop Vista that started getting a black screen - from what we can tell, it started when the Nvidia driver auto updated. We then upgraded to Windows 7 and ran the latest HP Updates, hoping that would fix the issue. It has not.
We've tried to remove the Nvidia driver, however, each time the system restarts, it auto-installs it.
We've been reading recommendations about upgrades to video cards, power supplies, etc., however, thought we'd come to the main source for advice, before we attempt to swap anthing out on own.
Your guidance/recommendations is greatly appreciated.

Hey italianice,
I'm sorry you're running into this issue with the black screen. Is there any pattern to when the black screen appears? During videos? Games? High CPU usage? During other specific programs?
It would be helpful to know which video driver and BIOS version you have currently. Here is a link for steps to find your current BIOS version. I'll keep an eye out for your reply

Similar Messages

[Solved] Black Screen after KDM - plasma-desktop error with libpng

Hey,
i just wanted to log in to my arch session, but after KDM theres just a black screen.
I found out, that all programs startet via krunner are working.
So it's just plasma-desktop, what makes the problems
plasme-desktop
LONG OUTPUT AND IN THE END
libpng warning: IDAT CRC error
lippng error: PNG unsigned integer out of range
thats it... plasma-netbook works without any problems... also window effects are working
Dont know wheter its any help, but i dualboot with macOS and share the desktop, where 2 .jpgs are stored, dont know wether this is important...
Edit:
I've tried to delet the jpgs in the desktop folder and uninstalled kde-wallpapers. Still no luck
I've also tried to downgrade libpng to 1.5.14, but when i reboot, kdm wont start.... maybe there's something i haven't thought through....
However the Output changed a bit, heres the full output:
[markus@MacBook ~]$ plasma-desktop
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
Fontconfig warning: "/etc/fonts/conf.d/50-user.conf", line 14: reading configurations from ~/.fonts.conf is deprecated.
QDBusObjectPath: invalid path ""
QDBusObjectPath: invalid path ""
QGraphicsLinearLayout::insertItem: cannot insert null item
QGraphicsLinearLayout::insertItem: cannot insert null item
plasma-desktop(1757)/libplasma Plasma::isPluginVersionCompatible: unversioned plugin detected, may result in instability
13:11:22.331 Info [Appl. Thread] YaWP::YaWP (Line 95):
13:11:22.331 Info [Appl. Thread] YaWP::YaWP (Line 96): yaWP 0.4.2 compiled at Mar 30 2012 22:19:57 for KDE 4.8.1 (4.8.1)
13:11:22.332 Info [Appl. Thread] YaWP::YaWP (Line 97): yaWP 0.4.2 is running on KDE 4.10.4
13:11:22.332 Info [Appl. Thread] YaWP::YaWP (Line 98):
plasma-desktop(1757)/libplasma Plasma::isPluginVersionCompatible: unversioned plugin detected, may result in instability
plasma-desktop(1757)/libplasma Plasma::isPluginVersionCompatible: unversioned plugin detected, may result in instability
plasma-desktop(1757)/libplasma Plasma::isPluginVersionCompatible: unversioned plugin detected, may result in instability
plasma-desktop(1757)/libplasma Plasma::isPluginVersionCompatible: unversioned plugin detected, may result in instability
13:11:22.735 Debug [Appl. Thread] YaWP::loadConfig (Line 529): "wunderground" "Nuernberg, Germany" "Germany" "de" "airport:EDDN" "Europe/Berlin" "DE"
13:11:22.746 Info [Appl. Thread] WundergroundIon::WundergroundIon (Line 203): WundergroundIon 0.4.2 compiled at Mar 30 2012 22:20:16 for KDE 4.8.1 (4.8.1)
13:11:22.746 Debug [Appl. Thread] WundergroundIon::getWeatherData (Line 758): QUrl("http://api.wunderground.com/auto/wui/geo/WXCurrentObXML/index.xml?query=EDDN")
13:11:22.747 Debug [Appl. Thread] WundergroundIon::getWeatherData (Line 819): Added XmlWeatherData for "airport:EDDN"
libpng error: bad adaptive filter value
Thanks for any help!
Last edited by markus2107 (2013-06-17 14:52:06)

Should have done that earlier... renaming .kde4
Now it workes... and after uninstalling yawp-plasmoid i renamed .kde4... everything's fine now!
So if anybody else runs in this problem too, my advice: check your aur-plasmoids!

Flashing black screen hp pavilion dm4

For a few weeks/months (since mid august) now my laptop (hp pavilion dm4-2070us) has been flashing a black screen every so often, sometimes repeatedly within a few minute time span or there could be hours at a time that it does not flash. Also, only parts of the screen flashes black not the whole thing. I have taken it to the store I bought it from and another store and they said it could need a new screen, but I am not sure if this is a hardware problem. The laptop has no water damage and no other external damage. I do not know if this is a sign of a crashing computer.
Thank you for your help!

A flashing screen is usually a hardware problem, along the lines of a damaged ribbon cable. However, there are a few things you can try to resolve the issue. Try the steps in this document and let me know if any of those help.
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Click the "Accept as Solution" button if I resolve your issue.

T400 stuck on black screen or empty blue desktop

T400 won't boot; it is stuck on either a black screen or an empty useless blue desktop with no icons. Removing battery and holding down power button trick thwn powéing back up did exaxtly nothing.
What do I do? Is my system hosed???

Hi HokeyPokey,
Welcome to Lenovo Community!
As per the query we understood that you are facing the issue with No Boot on your ThinkPad T400.
Are you able to see Lenovo logo after switching ON the system?
Have you checked with booting the system to safe mode option?
Boot the system to BIOS mode and check if Hard disk drive is detecting?
Please let us know the result after performing the steps.
Hope to hear back soon!
Best regards,
Hemanth Kumar
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Black Screen HP Pavilion g7

I have a HP Pavilion G7 running Windows 8 and when i turn it on the HP logo display the dots go around in the circle. After few minutes if flash a blue screen quickly and than say "Preparing Automatic Repair" and goes to a black screen and nothing happen. Try several times to hardreboot (removing power supply and battery, hold the power button and than reconnect), hold F10 for the BIOS screen. But when i holg down F11 for system recovery...it just be a black screen........Please help

Enter BIOS setup by tapping/holding the F10 key immediately after powering on the laptop.Use Diagnostics to test your hard drive.
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(Resolved - My own stupidity) Remote Desktop 8.1.3 for iOS (iOS 8.0) - Connects to Black Screen

New version, new problems!
After finally solving my problems with connecting introduced in 8.1.0 for iOS, I have updated to 8.1.3 and have a new problem!
I am able to log in, but upon login, I am presented with a black screen instead of my desktop. If I turn on the mouse pointer, the pointer shows up, but it does not control the remote computer.
Additionally, the iOS Remote Desktop Client is not "taking over" the remote computer... I am typing on the computer to write this, while my iPad's Remote Desktop app is supposedly "connected" to it.
Anyone else having this new issue?

Resolved - My own stupidity! :-P
Garbage in, garbage out! I have two computers connected to the same monitor...My 2nd computer was active on the monitor, hiding the fact that my primary computer (and remote desktop host computer) needed a restart! I restarted, and the issue
was resolved!

Black screen after unlocking PC that was previously Remote Desktop-ped to

I'm running Windows Server 2008 R2 Standard, Service Pack 1.
Often I need to work from home, in which case I jump onto a VPN via Citrix client and remote desktop to my work PC. Subsequently, when I come to work in the morning and attempt to unlock my PC, from time to time after entering my login credentials and pressing
'Enter' I get presented with two blank/black screens instead of my desktop. I tried being patient, moving my mouse a bit etc but to no avail. I notice that the keyboard is still functional (CAPS LOCK light goes on/off), and there appears to be some hard drive
activity. However I end up needing to reboot the PC (and lose whatever unsaved work I had).
I've done some googling, attempted most of the suggested solutions (involving changing some registry settings, updating video card drivers etc) but to no avail.
My video card is NVIDIA Quadro NVS 295, driver date 24/01/2014. I do have dual monitors configured (lenovo).
Any tips/suggestions would be much appreciated,
Greg

Hi Greg,
Thank you for posting in Windows Server Forum.
You can try the sfc /scannow command to scans the integrity of all protected system files and repairs files with problems when possible. For more details, please refer to the following article.
Sfc
http://technet.microsoft.com/en-us/library/ff950779.aspx
Also perform the clean boot after restarting system and check the status. You can refer
this KB article.
In addition to this, please check below article and KB for additional details.
1. Windows Server 2008 Repair Steps for No Boot Issues
2. Windows Server 2008 R2 hangs at black screen during boot
Hope it helps!
Thanks.
Dharmesh Solanki

Random black screen freezes - GPU or PSU issue?

Relevant specs:
Gigabyte Z87
MSI GTX 770 (N770 TF 2GD5/OC) - stock speeds, 335.23 WHQL drivers
i7 4771
750w Antec High Current Gamer
Windows 8.1 Pro 64 bit
For the past three weeks, this setup has been very stable. I then went on vacation for 3 days and then came back. All of a sudden, I then started getting random black screens (which occured in the middle two consecutive LOL matches, I'm quite sure I'm in the tribunal now...). If I'm in the middle of a game, the sound will stutter, and the game/system might appear that it's still playing for a few more seconds even though I can't see anything. I either have to manually reboot, or it'll just restart itself. I don't notice any error message when my system restarts. I tried doing a 3DMARK run to stress-test it, and it black-screened during Fire Strike. Sometimes I'll get a black screen at the Windows desktop doing nothing in particular to stress the card; I even got one in my BIOS setup screen!
This morning, I did a fresh boot and ran GPU-Z. The VDDC graph doesn't look quite right to me, given all the hiccups. Oh, and 5 minutes after that screenshot, another black screen.
The reason I mention the PSU is 1) I noticed that that particular PSU is rated 40A on the 12V rail, and yet the GPU requires at least 42A. but there are two 12V rails on that PSU, for 80A, which should be more than sufficient, and 2) I didn't notice any artifacts prior to any black screen. It's just weird that these would happening out of the blue - it sounds like the kind of issue that would've been present on day 1.
Any thoughts?

I have the same issues.
Specs:
I7-4771
ASRock B85M Pro4
MSI GeForce GTX 750 [N750 TF 1GD5/OC]
Super Flower Golden King SF-550P14PE 550W
Windows 8.1 Pro 64bit
Same thing on Windows 7 Ultimate 64bit
Tried both WHQL and beta drivers. This is the second GTX 750 with the same issues, my first card was replaced.

HP Pavilion a6000 desktop with Vista black screen - need help please!

I have an HP Pavilion a6000 desktop with Vista. Yesterday it was working fine and today we have the black screen that reads:
Award BootBlock BIOS v1.0
Copyright (c) 2000, Award Software, Inc.
BIOS ROM checksum error
Detecting IDE ATAPI device...
Found CDROM, try to boot from it...Fail
Detecting IDE ATAPI device...
Detecting IDE ATAPI device...
Detecting floppy drive A media...
Drive A error. System halt
I am not a techie, but looked at online forums and have tried f10 at startup with no change to the screen other than it stops after the first four lines and does not try the floppy drive. I also pulled out the round battery, waited and then reintstalled. Same problem.
Also, computer emits a single, repeating beep after startup.
HELP!

jjeahall
I saw your post and wanted to comment. I'm not an expert on these types of situations but did some digging around and found the following at Tips4PC.com.... read below
"There are two types of computer black screens that can appear in Windows. One where the computer will not boot up but you have a beep sequence sounding to let you know what the problem could be, and the other has nothing at all. No beeps, no cursor, no logo screen, and no choice to boot to safe mode or access the bios.
If your computer will not boot up and you get a beep sequence, I am not saying it is good news, however it is a step in the right direction towards solving this problem. This is a message from your computer that can be understood by looking up your bios (the brand) beep code. For example you may have an Award Bios, Ami Bios, Phoenix BIOS, Compaq, Dell, or Acer Bios. This list goes on and on. You can search for Bios beep codes in Google. Here is an example of results in Google search"
Link
Also I went into the Troubleshooting Guide for the A6000 and found the following information. You need to use F11 for recovery. See below
Starting System Recovery from system startup
1
Turn off the computer. If necessary, press and hold the On button until the computer
turns off.
2
Remove the HP Personal Media Drive if your computer includes one. Disconnect all
peripheral devices from the computer except the monitor, the keyboard, and the
mouse.
3
Press the On button to turn on the computer.
4
During the startup, do the following to enter the Recovery Manager program:
When the blue screen with the HP Invent logo appears, press the F11 key on the
keyboard. (You have only a few seconds to press the F11 key before the normal
startup process continues.)
5
The computer starts the Recovery Manager program; wait for the onscreen instructions
to display, and then follow those instructions.
6
Complete the computer startup, finish the registration process, and wait until you see
the desktop. Then, turn off the computer, reconnect all peripheral devices, and turn on
the computer.
I am an HP employee.
Regards,
Cooper56
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HP Pavilion DV6; Black Screen & Atikmpag.sys BSOD with external Monitor

Hello Guys.
I have HP Pavilion DV6 Core i7 with ATI Mobility Radeon HD 5650 Graphics Card. Two weeks ago, I started getting continous Atikmpag,sys BSODs. The operating system also started giving me warnings about the hardrive. After a few days, the BSODs got more frequent. Then one day, I was doing normal stuff on my PC and the Display Driver crashed. Instead of recovering, the PC froze. I forced restart my PC but it got worse. The display of my laptop went black. I connected the laptop to external monitor which detected the display. When I tried to load the windows, it started giving me the Atikmpag.sys BSOD on the start up. Now the operating system works fine in the Safe Mode but with nothing on the laptop's screen. The soultions I have tried so far are.
-Reinstalled the windows thrice
-Removed the drivers and installed the updated ones a bunch of times.
-Rolled back the bios to an earlier version
-Removed the hardrive and tried to load it from an operating system installed on external flash drive
-Tried loading the PC with linux on external flash drive
-Opened the laptop and cleaned it thoroughly
-Removed all the components and plugged them one by one.
-Removed the old Atikmpag.sys in system32 folder and expanded it with the latest ones.
-Installed every thing fresh from HP website
None of these tricks have given me any luck yet. The only way, I could use the operating system in normal mode, is to delete the atikmpag.sys file in safe mode and then log on back in normal mode. I also analysed the minidump file through window debugger and it says that atikmpag.sys is causing this crash with the TDR message. I did all these with an external monitor as the display of the laptop is black since that day.
Below are the detailed specs of my laptop.
OS Name: Microsoft Windows 7 (64 bit) Home Premium
Version: 6.1.7601
System Model: HP Pavilion Dv6 Notebook PC
Processor: Intel Core i7 Q 721 @ 1.60 GHz
Bios Version/Date: Hewlett- Packard F.29, 11/7/2011
Installed Physical Memory (RAM): 6GB
Graphics Card: ATI Mobility Radeon HD 5650 1 GB
I have tried almost every solution available on these forums but still have not gotten any where. I am wondering how could the display, graphics card and hard drive stop working at the same time .
I would really appreciate if someone colud help me through this problem.
Thank you
P.S. Kindly ignore my English mistakes as it is not my first language.

Hi Goloono,
Welcome to the HP Forums!
I would like to take a moment and thank you for using the forum, it is a great place to find answers. For you to have the best experience in the HP forum, I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
First I would like to reassure you your English was great, I had no problems understanding you.
I grasp that you are getting a black screen with the error message " Atikmpag.sys".
Here is a link to Troubleshooting Error Messages on a Black Screen that may Occur During Startup or Boot.
Have you run The HP Support Assistant to help with updates and resolving issues.
Here is a link to a Microsoft Community Page with this exact issue. There are some suggestions that may help.
Blue Screen error with atikmpag.sys in Windows 7 .
Here is a link to the HP software and driver page. You will need to input your exact model of DV6 you have and follow the prompts. This page will have the recommended drivers and it will list bios updates. if there are any applicable ones.
HP Drivers & Downloads.
How Do I Find My Model Number or Product Number?
At one point you state you had a hard drive error, to rule that out I would run a diagnostics. SMART Media Test Error Appears when Notebook is Started
Please let me know if this has helped.
Sparkles1
I work on behalf of HP
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Windows 8 HP Pavilion dv7-4285dx Upgrade results in black screen after intallation finalizes.

I have a 2011 HP Pavilion dv7-4285dx with Windows 7 64 bit Home premium installed. The notebook/laptop has a AMD Radeon HD 6300M series display adapter with driver version 9.2.2.0 dated 9/27/2012 and an ATI technologies Intel HD Graphics display adapter with driver version 8.7771.1.0. The notebook/laptop has not had a hardware upgrade and contiains the orignal factory OS. BIOS is current to latest available.
The issue I had while upgrading to Windows 8 is after the install finalizes (settings and preferences are entered) and the system boots to the tiles screen, the display works fine. Clicking to the desktop works only for a few moments before the screen goes dark. Pressing the power button and/or closing/opening the lid results in at times a black screen (no power to the screen) or black screen (power to the screen) or a black screen where only the mouse pointer is visible and moves around the screen. Restarting the computer results in a repeat of the issue at times while other times it will boot directly to what appears to be the windows desktop. You can interact with the file folder icon on the task bar as well as internet explorer, and you can get the charms bar and tile screen. Any attempt to open computer management or any control panel or task manager will open the window as an icon on the task bar. You can mouseover the icon to "preview" a small version of the window but you can not click on it to maximize.
I attempted the following workarounds:
1) Clean install of Windows 8: Installs but fails with same result as above
Refresh PC from windows 8 rescue media: Works slightly longer until AMD driver fails and then reverts to situation above.
2) Uninstalling all display adapters (via computer management) and then upgrading to Windows 8: Results in microsoft drivers getting installed, works much as refresh above until AMD driver fails and then reverts to above situation.
3) In Scenarios 1 and 2, I also tried to use windows update within Win8 to update the drivers there are updated MS drivers available ,(dated as late as 10/27/2012) but intalling those drivers also resulted in a failure of the adapter within a short period of time as did NOT updating the drivers.
4) Disabling display adapters and then restarting: Results in a BSOD (Blue Screen) IRQL_NOT_LESS_OR_EQUAL Stop: 0x0000000A error during boot as the OS runs into trouble with the driver before Windows 7 boots. This happens if one or both drivers are disabled.
5) Disabling display adapters before in-place upgrade to Windows 8 results in the Windows 8 equivalent of a BSOD and results in the system shutting down and then reverting to Windows 7.
Through research, I determined some ppl had luck connecting another monitor/HD TV through VGA/HDMI and then using the function-screen button to switch, with my system this resulted in the same issue displayed on the TV/Monitor. There are also updates to ATI and Catalyst center available including drivers and installing these do not remedy the issue. Intel was checked and there are no drivers available as HP uses a "custom" driver for intel. Attempting to install any of these Intel drivers will result in a fail with a compatiblity error.
Windows 8 has no safe mode ability from the windows 8 rescue media disk, you cannot F-8 as you could in the preview. Safe mode must be reached via charms, settings, startup and then selecting safe mode as a boot option, which is not available as the display adapter malfunctions. In those scenarios where I was able to get a windows desktop to boot up as in the first paragaph I can get to the restart settings via charms, but clicking to bring up the restart menu requires another window to open which is only visible as a "preview" on the windows task bar.
if you are going to attempt to try any of these,
1) Use a third party software to image your pre-win 8 upgrade system that you can boot into from USB or CD;
2) Before starting the process, disable the UAC prompt and remove any passwords from logon, as those things will require you to interact with the OS and you will not be able to do this when the adapters fail. The screen will shadow out as it usually does but the prompt will not be viewable.
3) Create an ISO image of the Win8 install media and write down the product key. If you are able to get a successful boot, before the drivers fail, create a Windows 8 rescue media disk.
I spoke with HP tech support this morning (10/29/2012) they are aware of the issues and they lie with the display adapters. They are working toward a solutuion but there are none available at this time and no date when they will be available. They recommend checking the support website and having the web page autoscan your PC as the drivers will show there when they are posted and they will be installable from Windows 7 so there will be no issue with upgrading to Windows 8. Bottom line, do not upgrade to Windows 8 at this time.
MS Tech support escalation tier reps also informed me there is no present workaround available.
Hope this helps and saves somebody some time!
JJ

My laptop sat at BestBuy from Friday night until today (10-31-12)! They couldn't figure out how to fix the problem so I finally told them to revert my latop back to Windows 7! I hope HP reads these and will hurry up and make the updates needed so that I can run Windows 8 on my Laptop! I just bought mine in July of last year there is nothing wrong with it and after dropping about $1200.00 for my dv7-4285dx along with the Best Buy Geek Squad package I do not feel like having to drop more money into another laptop!! PLEASE HURRY AND FIX THIS I DIDN"T DROP $69.99 plus tx to not be able to use Windows 8! Even before I did the upgrade I had the GEEk Squad check to make sure I could make the upgrade and was told this laptop well surpasses the required minium to run Windows 8!!!!!!

Pavilion a6700f hangs on HP Splash Screen, but does boot up after 10 minutes

I've got a new (2 months old) Pavilion a6700f
Everything was working fine the first six weeks
Not sure what triggered this, but now, when I try to start / restart the computer
It gets to the HP splash screen and just hangs there for over 5 minutes (literally)
Then it goes to a black screen for another 3 minutes or so,
Till it finally says its loading Windows, where it boots into Vista 64 and all is working
I was thinking its something going on with the BIOS
So I downloaded one from HP, old bios was 5.28, "new" one is 5.17 (that is what it has now)
This had no impact on the 10 minute boot up
Anyone have any ideas?

When you don't have the BIOS update for download then it is not possible to get it from any where.
Although I am an HP employee, I am speaking for myself and not for HP.
Say thanks by clicking the "Kudos! Star" which is on the left.
Make it easier for other people to find solutions, by marking my answer with "Accept as Solution" if it solves your issue.

HP Pavilion DV7-1428ca _ CAPS + NUM LOCK Continually Blinks + Will not Start up Black Screen

Would appreciate any suggestions on the issue I am encountering.
I have an HP Pavilion DV7-1428ca that was left powered on, so it went into Safe mode (screen goes blank). Once I came back to my Laptop hitting any key would take out of of the Safe mode however this time it did not. It remained with black screen irregardless of buttons pressed.
Had booted and can hear the fan and hdd go for the 2secs then it stops to a Black Screen with the "CAPS + NUM LOCK" Continually Blinking. Tried to Hard Boot several times but the same thing re-occurs.
It does not seem to be blinking in a series a code, just a steady blink (every sec) for both the CAPS + NUM Lock for as long as I leave it on. HP Site provides a chart from 1-6 series of blink codes which does not seem to apply to me.
Being out of Warranty I am hesitant in bringing it to a local repair shop without trying any alternate trouble shooting first.
Thanks

Hi,
First of all, shutdown the notebook, unplug the AC Adapter unplugged, remove the battery, and then hold down the Power button for a full minute. Plug in the AC Adapter ( leave the battery out ) and see if the notebook will start.
Regards,
DP-K
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Desktop stuck at black screen with cursor in normal mode but boots fine in safe mode after updates.

After running some updates the other night my laptop stopped loading the desktop and just gets stuck at a black screen with a cursor after I log in to the user account. The only thing I can do from there is do ctrl+alt+delete, then log off or restart.
I can't open up task manager. I tried creating another account in safe mode thinking there was an issue with the account but I still have the same issue. In event viewer I have two warnings one is
event 6000 winlogon, The winlogon notification subscriber <GP Client> was unable to handle the notification event
and event 4006, winlogon The windows logon process has failed to spawn a user application. Application name. Command line parameters: C:\Windows\system32\userinint.exe.
As well as error event id 1003, CertificateServicesClient Certificate Services Client failed to invoke the Providers in response to event 512. Error code 2147956401
and error 1001, certificate services client. certificate services client failed to load provider pautoenr.dll. error code 14001. I checked the registry and the path points to the right directory for userinit. I have tried running
System Repair but no errors were found, and I ran sfc /scannow and no errors were found either. The computer did not have System Restore enabled and I do not want to restore to factory settings. I also ran registry mechanic and it found no errors. Any suggestions
besides restoring to factory settings?

Hi,
We may try to reinstall Windows 7 Service Pack 1 for a test.
In addition, let us perform the following steps.
1. Click Start, Run, type lusrmgr.msc then ENTER.
2. Select Groups in the left pane.
3. Double-click Users in the right pane.
4. Click Add, and then click Locations. Scroll to the top of the Locations dialog and select the local computer name, then click OK.
5. In the Enter the object names to select field, type Interactive; Authenticated Users (separated by a semi-colon). Then click OK.
6. Restart the computer.
Or we can run the following commands from a command prompt:
Net localgroup Users Interactive /add
Net localgroup Users "Authenticated Users" /add
Kim Zhou
TechNet Community Support

Remote desktop (and VNC) show black screen

I am using Remote Desktop (or VNC) on a 10.6 laptop to access my 10.6 Mac Pro at work. The desktop Mac is up and awake because I can connect to it by SFTP and pull down files. But when I make a Remote Desktop connection, all I see is a black screen and no password window (to break through the screensaver, as usually happens). This used to work just fine - I don't know what changed. How do I diagnose and/or fix this - why isn't my remote access working? (btw, I don't know if this matters, but I have 4 monitors on this Desktop Mac Pro, although it used to work just fine).

Hi,
Please make sure you have installed the correct NIC drivers for your RDS server and PC, and checking the switches, setting the speed of NIC's to auto might help you to solve the problem.
You can also check the following items:
Please try lower screen(no full screen) resolution in Remote Desktop Connection to see whether this issue still exists.
Disable the use of "Bitmap Caching" on the RDP client.
Verity that the server, client and the network equipment using the "MTU" size.
More information:
A black screen may appear while logon by using remote desktop
http://support.microsoft.com/kb/555840
Technology changes life……

Re-occuring Black Screen - HP Pavilion a6700F desktop

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