Lcd shadow when connected to pc but not on dvd

Hello,

My lcd is showing shadow text and icons and some light static interference scrolling slowly downwards. This is not happening when I plug it into my dvd player.

What could be causing this? my computer is grounded properly, and this effect doesn't happen when I use a CRT.

Can you guys help me fix this? I did some research and so far what I gathered is that it could be magnetic interference from other cables and devices but I tried solving it to no avail. I haven't replaced the cable yet since it works fine with the dvd.

My video card is fine with the CRT so , there's no problem with that. Could it be the LCD cable terminals touching the display port and computer casing?
30 answers Last reply
More about shadow connected
  1. I forgot to add, the lcd "blinks" once, into "blank and dark" randomly when connected to pc.
  2. Monitor make and model?
  3. Dell E178FP

    Video card is GEforce 6150SE Nforce 430 (built-in)
  4. I'm using this LCD right now and the interference is moving upwards now, slowly. Just so you know. :D
  5. what type of cable are you using? VGA (D-sub 15), DVI, HDMI...

    edit googled the monitor model, and it only has D-sub so thats it then...
  6. VGA, with "chokes" if that's what they call it on both ends. (sorry for not being so detailed. I'm a total newbie here. )
  7. :lol: This monitor only has the 1 VGA (d-sub) connector is that right? And the cable is the same one you used with the CRT?
  8. paddy, the crt has it's built in D-sub, the cable is brand new and intended solely for this LCD. but it seems like a generic one. it works fine with the dvd and displays perfectly. so im wondering if the pc makes the difference or the cable..
  9. see if adjusting the clock and phase settings on the lcd OSD (on screen display menu) has any effect on what you are seeing
    http://www.lagom.nl/lcd-test/clock_phase.php
  10. ok, I went to the link and the gray phase was distorted and moving, I used the auto feature and the display improved a bit better. there are still shadows though and the interference is still having fun in here.
  11. If you take a screenshot and post it up here or view on another computer, you will definitely know if its an issue before or after the output...have a feeling it is monitor settings though..

    Also...what is your refresh rate set to in windows?
  12. hmmm. I don't have my camera with me..will post screenshot soon. display improved though after the clock phase test. I will play with the other tests for now. Just imagine for now when I look at your username paddys09

    theres almost another full "9" shadow there. but faint. and the envelope and man icon have shadows that attempts to replicate very faintly a third time.

    refresh rate is 60 hz
    resolution is 1280x1024 (native)

    this is the optimum setting.

    tried switching to other refresh rates and resolutions earlier but the shadows persist.

    will try another cable soon and will report back.
  13. Your refresh rate is fine, By screenshot I meant hit the "Printscreen" button on your keyboard and paste into MSpaint etc, then upload to an image hosting site and provide a link
  14. ok will post image in a few minutes.
  15. Cool, have you tried using the "auto adjust" setting on your monitor?
  16. yes paddy09. auto adjust in OSD improves display but does not remove the shadows. btw, thanks kari for the lagom link! that was very useful and improved the display much better. only problem now is the faint static scrolling and the shadow effect.
  17. Yea, all is fine on my end, so I'm guessing its your monitor settings or possibly but unlikely your cable..

    Im not very familiar with that exact monitor but here is the troubleshooting page:

    https://support.dell.com/support/edocs/monitors/E178FP/EN/ug/solve.htm#Common%20Problems

    Run through them and see if you can improve anything
  18. thanks paddy09. will go through that. I just did another auto adjust and no change. it seems like it's steadily improving but can still see the shadows. I can live with it for now, and yeah I agree that it could be the cable...will update.
  19. :) heh thanks! At least it did some good then even if it didnt solve your problem. :)
  20. One thing you should try is to look at the pins if they are ok and reverse the cord. Put the end that is connected to VGA into monitor. I know it sounds odd but it does not hurt to try :) It helped my monitor with fuzziness I had DVI cable tho...you may also try DVI cable and use D-sub/DVI connectors
  21. http://img18.imageshack.us/img18/8675/screenmfb.png

    Uploaded with ImageShack.us

    White vertical lines on the arrows and they go sharper and thinner as I move the window to the far right and they disappear on the far left. When screen is white there are similar lines on the left too, but when black there is none.

    I also tried the LCD conditioning function and they disappear on OSD functions. it looks like a signal issue since I played a dvd on the player(not pc) and there are none of these issues (no interference and shadows at all). gtg for now, thanks for the awesome help guys! you rock. will be back as soon as I test a new cable. :)
  22. Yes maxinexus, I did that earlier and the pins are complete ( I found that odd since I usually saw at least a missing pin on other monitors(crt)...hehe)

    and I've also tried switching the cables but same predicament. The interference has waned a bit now and I am removing all the adjacent cables....l8r
  23. hi guys, just an update. the interference thing is solved. it was caused by my failing power supply. the shadow has waned a bit though but not really eliminated. only issue left is the blinking. like my video card is too sensitive to a current/voltage fluctuation, ie when someone flips a light switch somewhere in the house, it blinks. this was greatly mitigated by me adjusting the refresh rate to 72 hz. it rarely blinks to black now. but it looks like there's something wrong with my built-in nvidia video card. this still happens even if the pc is connected to an AVR.

    so it looks like it's a power supply issue. I put the old power supply back since i've yet to buy a brand new one. and the alternative is low in watt output.

    could it be that my graphics card is failing? or is it just a power issue?

    anyone encountered this before? thanks a lot guys! you've all been helpful.
  24. The issues you described in the OP were not caused by the on board graphics failing, definitely something after the output as the images you posted were fine...

    ...The screen blinking, on the other hand, could be an issue with your GPU, although things like that are usually accompanied by a driver crash...

    Your GPU needs very little power as its part of your motherboard, there isn't many PSU's out there that couldn't power your setup, but it might be failing...either that or your motherboard...

    Could you list your full system specs including PSU make and model if possible?
  25. Specs

    AMD Sempron LE-1200 2.1GHz
    1024 MB RAM - DDR2 Kingston
    NVIDIA GEForce 6150SE nForce 430
    Dell E178FP LCD monitor 17"
    AM2 Board Emaxx EMX MCP61S AVL
    PSU - Trend AJ-500W
    SATA Hard Drives 80 GB, I removed the slaves and DVD ROM
    Ethernet is Marvell Yukon 88E8040 PCI-E built in
    2 memory slots max 4 GB
    2 PCI slots
    1 slot for Graphics card unused
    BIOS settings on optimized defaults
    HD on sata


    The fan at the back of the PSU stop so I removed it and cut the wires. Cooling it with another fan.

    The motherboard I think have some connectivity problems due to stretching. Like when I over exert it when disassembling/assembling, I have to put it into it's right position so it could do a POST. All in all while it's working, there is no problem.

    Fan also stopped while I was having PSU issues. But it's working now no problem with the same PSU. IT could just be the dust interfering with the plugs.

    Built in audio failed way back and I disabled it in the bios.

    Replaced it with an old PCI soundblaster card that works fine.

    if you need more info just let me know, I have to look into the board and it's 3 am already here on my end, a bit sleepy now...
  26. edit : fan *stopped, can't seem to edit posts now
  27. and yeah paddy, I remember issues started happening after a windows 7 driver update so I tried to rollback into the basic windows7 driver for my nvidia card. It lessened the blinking. But back then It was becoming more and more frequent until I discovered the 72 Hz refresh rate solution.
  28. Hi Folks
    I have read this thread with great interest having scoured the web for a solution to the very same problem The shadowy lines o my screen go from left to right and consit of two vertical bars and if I look closely uniform layout of squares with symbols on almost like a keyboard or a layout of wingdings. I run a bank of three identical monitors connected to two seperate PC's. The details of both machines are set out below...
    All monitors run through switches so all three monitors run in the same configuration from both PC's using the same cables and connectors etc.... The Dell PC has no problem whatsoever nor do two other PC's that are connected just to the screen concerned. The problem only exists when using the HP Workstation, so for me at least I am assuming its something in the setup of the HP and or the Nvidia Cards.
    Details...

    Dell
    Graphics=
    Name AMD Radeon HD 6700 Series
    PNP Device ID PCI\VEN_1002&DEV_68B8&SUBSYS_30001002&REV_00\4&DDE86B&0&0008
    Adapter Type AMD Radeon Graphics Processor (0x68B8), Advanced Micro Devices, Inc. compatible
    Adapter Description AMD Radeon HD 6700 Series
    Adapter RAM 1.00 GB (1,073,741,824 bytes)
    Installed Drivers aticfx64.dll,aticfx64.dll,aticfx64.dll,aticfx32,aticfx32,aticfx32,atiumd64.dll,atidxx64.dll,atidxx64.dll,atiumdag,atidxx32,atidxx32,atiumdva,atiumd6a.cap,atitmm64.dll
    Resolution 1920 x 1080 x 60 hertz
    Bits/Pixel 32
    PC=
    OS Name Microsoft Windows 7 Professional
    Version 6.1.7601 Service Pack 1 Build 7601
    Other OS Description Not Available
    OS Manufacturer Microsoft Corporation
    System Name XPS
    System Manufacturer Dell Inc.
    System Model XPS 8300
    System Type x64-based PC
    Processor Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz, 3401 Mhz, 4 Core(s), 8 Logical Processor(s)
    BIOS Version/Date Dell Inc. A03, 15/02/2011
    SMBIOS Version 2.6
    Windows Directory C:\Windows
    System Directory C:\Windows\system32
    Boot Device \Device\HarddiskVolume1
    Locale United Kingdom
    Hardware Abstraction Layer Version = "6.1.7601.17514"
    User Name XPS\Dave
    Time Zone GMT Standard Time
    Installed Physical Memory (RAM) 16.0 GB
    Total Physical Memory 16.0 GB
    Available Physical Memory 11.0 GB
    Total Virtual Memory 32.0 GB
    Available Virtual Memory 26.7 GB
    Page File Space 16.0 GB
    Page File C:\pagefile.sys

    HP
    PC=
    OS Name Microsoft Windows 7 Professional
    Version 6.1.7601 Service Pack 1 Build 7601
    Other OS Description Not Available
    OS Manufacturer Microsoft Corporation
    System Name DAVE-HP
    System Manufacturer Hewlett-Packard
    System Model HP Z600 Workstation
    System Type x64-based PC
    Processor Intel(R) Xeon(R) CPU X5570 @ 2.93GHz, 2926 Mhz, 4 Core(s), 4 Logical Processor(s)
    Processor Intel(R) Xeon(R) CPU X5570 @ 2.93GHz, 2926 Mhz, 4 Core(s), 4 Logical Processor(s)
    BIOS Version/Date Hewlett-Packard 786G4 v03.10, 09/07/2010
    SMBIOS Version 2.6
    Windows Directory C:\Windows
    System Directory C:\Windows\system32
    Boot Device \Device\HarddiskVolume1
    Locale United Kingdom
    Hardware Abstraction Layer Version = "6.1.7601.17514"
    User Name Dave-HP\Dave
    Time Zone GMT Standard Time
    Installed Physical Memory (RAM) 24.0 GB
    Total Physical Memory 24.0 GB
    Available Physical Memory 18.8 GB
    Total Virtual Memory 68.9 GB
    Available Virtual Memory 62.7 GB
    Page File Space 44.9 GB
    Page File C:\pagefile.sys


    Graphics=
    Name NVIDIA Quadro 4000
    PNP Device ID PCI\VEN_10DE&DEV_06DD&SUBSYS_0780103C&REV_A3\4&95673C&0&0018
    Adapter Type Quadro 4000, NVIDIA compatible
    Adapter Description NVIDIA Quadro 4000
    Adapter RAM (2,147,483,648) bytes
    Installed Drivers nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um
    Driver Version 8.17.12.7051
    INF File oem40.inf (Section009 section)
    Color Planes Not Available
    Color Table Entries 4294967296
    Resolution 1920 x 1080 x 59 hertz
    Bits/Pixel 32

    Name NVIDIA Quadro 2000
    PNP Device ID PCI\VEN_10DE&DEV_0DD8&SUBSYS_084A103C&REV_A1\4&16CE3479&0&0038
    Adapter Type Quadro 2000, NVIDIA compatible
    Adapter Description NVIDIA Quadro 2000
    Adapter RAM 1.00 GB (1,073,741,824 bytes)
    Installed Drivers nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um
    Driver Version 8.17.12.7051
    INF File oem40.inf (Section009 section)
    Color Planes Not Available
    Color Table Entries 4294967296
    Resolution 1920 x 1080 x 59 hertz
    Bits/Pixel 32

    I have tried also running the monitors at different refresh rates (max 60Hz).

    If anyone has any ideas I would be grateful...

    Thanks
  29. hey, I've gotten used to the shadows it's not a big problem now.

    If you you want to fix yours, try replacing your PSU. The lines are caused by the failing PSU.

    The blinking could be the LCD's problem(reacting to power surge), this was bought second-hand.
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