Question about Vga Computers & Internet

1 Answer

White display on my monitor even if I have not connected a VGA cable

Posted by Kibwana Rajab on

  • 2 more comments 
  • Larry Ng
    Larry Ng Feb 25, 2021

    first off some old monitors did that bad act/. VGA !!!
    2000 to 2010 years
    on all modern monitors this lack of sync on the sync pin VGA causes all modern monitors to shut down so not to burn the LCD cells.
    called the nasty shadow effect on LCD.
    yes some old monitors did that 20 years ago.

    you failed to tell maker of monitor nor model off the rear sticker clearly there.
    even some old CRT monitors did that. too..
    and all are bad acts. that.

    modern monitors all (energy star) USA
    go to sleep ,deep sleep, with lost of sync or RGB signals dead (red green blue), and go BLACK. and super low power, usage BY DESIGN.

    no monitor told why post lacking such a key fact????
    in text box we can not look over your shoulder. sorry can not!!!

    we have monitors now from 1981 to 2021.
    10000 of models. 2010 an newer are best !!!
    before that called terminals.
    I repaired to for ages. even RADAR scopes,

  • Larry Ng
    Larry Ng Feb 25, 2021

    OP next time tell what PC you have
    PC make & model
    monitor make and model
    or answers will be wrong, I promise !

  • Larry Ng
    Larry Ng Feb 25, 2021

    double posted so is Hp L1740
    in other post.
    see below for all monitors tests.
    OSD screens must work , with nO PC present
    if not the monitor is toasted.

  • Anonymous Feb 25, 2021

    Hp L1740
    test it on any PC with VGA jack
    even vast old laptops had VGA there.
    test it,
    if bad , trash that 16 year old pig.

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1 Answer

Aron

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  • Master
  • 1,761 Answers

Issues that could bring up the white screen problem on your computer can include a bad video graphics card or the graphics card is bad. Or blown capacitors or the video card is not working. Try and reboot your computer first to see if the problem goes away.

Posted on Feb 25, 2021

  • 2 more comments 
  • Anonymous Feb 25, 2021

    not if monitor fails on 2 PCs
    test #1 is that.
    test #2 is monitors OSD checks, for sure.

  • Larry Ng
    Larry Ng Feb 25, 2021

    Hp L1740, seen in his other post.
    bad monitor or VGA cable bad.
    this monitor does show
    "no input signal if missing"
    this monitor turned on last after PC turned on first
    will show these errors. (in your manual)

    "Monitor Going to Sleep— Indicates the screen display is
    entering a sleep mode.
    ?
    Check Video Cable— Indicates the video cable is not
    properly connected to the computer.
    ?
    No Input Signal— Indicates the monitor is entering a reduced
    power state but the power saving feature is set to off." manual quoted and true.
    sleep means black screened

    so if the cable VGA both ends removed
    did you,
    the screen must go black or the monitor is bad. white screens are not allowed, VGA cable pulled.

    test #1 , no PC needed (yet)
    remove all cables not AC below. (yes)
    turn on monitor.
    just show no input signal error message on the screen.
    if that fails or not . next
    power on the monitor only
    and push OSD menu button under 15seconds time. if you get the OSD pop up menu good
    if not the monitor is Dead.
    end story.
    if OSD works try new VGA cable to working PC
    test on 2 PCs to be sure the monitor is bad.

    OSD can in fact be working but the video ports are blown out inside the monitor;
    OSD = on screen display,
    RTM read your manual.


    In my shop I have VGA test box.
    I can test monitors with no PC present.
    and have adapters to do them all.


  • Larry Ng
    Larry Ng Feb 25, 2021

    test with #1 only. connected first AC cord.
    test OSD,
    see black screen 15 seconds after turned on.
    see warning
    OSD button is dead on some after 15 seconds
    a very simple test here, I bet yours fails.

  • Anonymous Feb 25, 2021

    once monitors test all pass
    we then attack PC. if dead.
    hint, you can not work blind.
    first things first.

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5 Related Answers

Anonymous

  • 1 Answer

SOURCE: DVI input on monitor not working

Contacted viewsonic about this issue- they suggested- have both dvi and vga hooked up to same machine. start with poweroff on both. power on monitor, then power on computer. when you see display coming from the vga, power off pc, then disconnect vga cable, turn off power to monitor, disconnect power cord from monitor for 5 + seconds, reconnect power cord, power on monitor, then power on pc.
If this doesn't work to get the dvi working, (as happened to us) we returned our monitor for a replacement, since it was still under warranty.

Posted on Nov 26, 2007

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Saigua

Steve Nordquist

  • 981 Answers

SOURCE: Monitor displays white screen when connected and powered.

Does the OSD settings menu work or (say, contrast) controls work? It could be a control circuit that somehow gets as far as switching the backlight on but can't get the video detection or further (resolution data interchange, etc.) stuff going. There might be a reset jumper for that somewhere in the monitor, or via holding Power for a few seconds, or a Power/brightness-down combo.

Without going to open it up for reset and test connections; there might be a utility (if you can borrow another monitor to get it going) supplied with the monitor to provide settings for it from the PC end! Wacky, but true.

Posted on Feb 23, 2008

Anonymous

  • 180 Answers

SOURCE: Missing VGA Cable for LCD Monitor - Help?

It should be 15 pin connector VGA .It should work.

Posted on Apr 19, 2008

Anonymous

  • 300 Answers

SOURCE: "No signal detected" when LCD connected with DVI-D Cable

Thank you for providing your configuration details.
You have failed to specify wheather or not your LCD Display is under Warrenty.

Perhaps these simple trouble shooting procedures will get the job done.

1. use the DVI to VGA adaptor that came with your card

Plug in a regular CRT monitor to the Primary Display Output Port using the DVI to VGA adaptor
( either port can be designated as the primary by you )
I like to use the Port nearest to the motherboard as the Primary

2. plug in the your LCD monitor on Secondary Display port using your DVI cable

At this point you should be able to see your desktop on the Primary CRT Display

3. Go to the display properties and use the Nvidia Dual Display Setup Wizard

set both desktops to CLONED at a resolution of 1024x768 and set the refresh to 60Hz
which is default for most LCD displays , some have higher refresh rates , consult your user manuel

If the display resolution and refresh are set incorrectly for your CRT or LCD you will see
Signal Out of Range ( if the display has the ability to display that error message )

At this stage both displays should be showing a Windows Desktop

If you now see your desktop on both displays , you can now put the LCD on the Primary Port



No Signal Detected ( this means the display device is not receiving a signal )

If your LCD display is still displaying the error message
"No Signal Detected" after performing the trouble shooting proceedures
You may need to read the user manuel about how to enable DVI signal input.

If you are certan you have done everything correctly but still see only "No Signal Detected"

Your LCD Display may need replacement

Loch Hime :-)

Posted on Sep 14, 2008

zecs

zaheer abbas

  • 123 Answers

SOURCE: Trying to hook up HP DV6000 laptop to Mits 55859.

heat vga chip

Posted on Jul 13, 2010

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1 Answer

My screen keep going white


To me this is a hardware problem.

Let's diagnose, and see Shunka_Reid.
Connect a VGA monitor to the laptop.

A) Laptop OFF, monitor OFF, connect a VGA monitor to the VGA port, on the laptop.

http://support.gateway.com/s/notebook/2009/gateway/nv/NV78/NV78lv.shtml

Number 3 - External VGA display port

General example of VGA connector (port), and VGA cable,

http://en.wikipedia.org/wiki/VGA_Connector

Scroll down a little for the VGA cable example.

You can use a CRT type of monitor, (Looks like a small TV), or a flat LCD screen monitor if it has a VGA cable.
General example of a CRT type of monitor,

http://www.wisegeek.org/what-is-a-crt-monitor.htm

B) Turn the monitor on. If a CRT type allow it to warm up.
Turn the laptop on.
By factory default settings, the display should show on the external VGA monitor.

IF not;
There are at least 3 display options available;
1) Internal monitor of laptop ONLY
2) Internal monitor of laptop AND external VGA monitor.
3) External VGA monitor ONLY.

Press, and hold the Fn key down, and at the SAME time tap once on the F4 key.
The F4 key is the Display Toggle-Over key.

Still no?
Hold the Fn key down again, and tap on the F4 key once more.

Do you get a good display on the external VGA monitor?
Post back in a Comment.

Also, has the laptop ever been cleaned on the Inside, to your knowledge?

Regards,
joecoolvette

Mar 04, 2013 | Gateway NV7923u 173Inch Laptop (NightSky...

1 Answer

I have replaced the screen in my Easy Note TJ65 but the screen is still white


Did you diagnose first?

1) First thing to check is to make sure the graphics chipset is OK.

[Chip and Chipset are slang terms for I.C.
Integrated Circuit,

http://en.wikipedia.org/wiki/Integrated_Circuit

The I.C. for graphics is the graphics chipset, or more properly, the G.P.U.
Graphics Processing Unit,

http://en.wikipedia.org/wiki/GPU ]

A) Laptop OFF, monitor OFF, connect a VGA monitor to the blue VGA port, on the left side of the laptop.

You can use a CRT type of monitor (Looks like a small TV), or a flat LCD screen monitor if it has a VGA Cable,

http://en.wikipedia.org/wiki/VGA_connector

(Scroll down a little bit for example of VGA Cable)

B) Turn the monitor on. If a CRT type allow it to warm up a couple of minutes.
Turn the laptop on.
No display on external VGA monitor?

Hold the Fn key down, and tap once on the F8 key.
(The F8 key is the Display Toggle-Over key)

Still no? Hold the Fn key down again, and tap once more on the F8 key.

[There are at least 3 display options available;
1) Internal monitor of laptop ONLY
2) Internal monitor of laptop AND external VGA monitor
3) External VGA monitor ONLY ]

Good display on external VGA monitor = good graphics chipset.

Going on.
The problem is the Video Cable, or in the Display Assembly.

Small primer;
An LCD screen does not produce light. It needs an additional light source.
A Backlight is the additional light source.

A Backlight can be a CCFL, (Or two of them), or a series of LED's.
(Light Emitting Diode)

A CCFL is a Cold Cathode Fluorescent Lamp.
Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.
Average thickness is 2mm. That is a little larger than 1/16th of an Inch.
Average length is almost as long, as the LCD screen is in height.

The Packard Bell Easynote TJ65 uses LED backlighting.

A screen Inverter is used to convert the power (Electricity), from the laptop; for the LCD screen, and Backlight.
LED backlighting does not use a screen Inverter.

http://www.laptopscreen.com/Spanish/model/Packard%20Bell/EASYNOTE%20TJ65/

Primer over.

You are down to the Video Cable, since you have installed a new LCD screen.

The Video Cable connects to the motherboard either under an area, under the Keyboard; or under the Switch Cover.
It then leads across the motherboard, and through the left Hinge.

From there the Video Cable leads into the Display Assembly, and connects to the LCD screen, and LED backlighting.

Due to just normal repeated opening, and closing of the laptop; the Video Cable connections TO motherboard, and/or TO back of LCD screen; may become loose.

Connection at motherboard side needs to be physically checked; to ensure this connection is not the problem.

You also may not have made a good connection to the back of the LCD screen.

(And it would be logical to also check the LED cable connection, while you are at it. Even though a bad LED connection would cause a dark screen, and not a White one)

Also the Video Cable's sheath should be visually checked for obvious signs of damage.
Any apparent signs of damage to the sheath of the Video Cable; may also mean damage to the tiny wires inside the cable.
(Stretched/Broken)

In your situation you need to know for SURE, if the Video Cable is good. Video Cable should be removed, and a multimeter set to OHM's is used, to check continuity of every wire in the Video Cable.

An economical multimeter is around $5 to $12, if you do not have one. Or take to a small computer shop, and have it checked for a few bucks.

Video Cable checks out for continuity, and connections are Tight; you have a bad new LCD screen, or the wrong one.

For additional questions please post in a Comment.
Regards,
joecoolvette

Nov 21, 2012 | Packard Bell Easy Note Tj65 554bu01031...

1 Answer

Display divided into 3 parts


LCD screen cracked, and Three even strips going across? Doubtful. Haven't seen it but I always have my mind open.

Three strips that are irregularly shaped? Look like glass that has cracked?
'Jagged edges'?

LCD screen is broken.

Three even strips indicates to me, that there may be a problem with the Video Cable. Then the screen Inverter is next in the diagnoses.
My money is on the Video Cable.

ALL power removed, Anti-Static Precautions FOLLOWED, I would check out the graphics chipset first.

1) Laptop OFF, monitor OFF, connect a VGA monitor to the VGA port on the laptop.
Left rear side. This is an example of a VGA Cable, and VGA connector. (VGA port on a laptop ),

http://en.wikipedia.org/wiki/VGA_connector

(Color of connector does Not matter. It is generally Blue, though)

You can use a CRT type of monitor, (Looks like a small TV), or a flat LCD screen monitor if it has a VGA cable.

2) Turn the monitor on. If a CRT type allow it to warm up.
Turn the laptop on.

There are at least 3 display options available;
1) Laptop internal monitor ONLY
2) Laptop internal monitor AND external VGA monitor
3) External VGA monitor ONLY

Press, and hold down on the Fn key, and at the same time tap once on the F5 key. (The F5 key is the Display Toggle-Over key)

No display on external VGA monitor?
Hold the Fn key down again, and tap once more on the F5 key.

Is the display on the external VGA monitor, the same as the internal monitor of the laptop?

Problem is the graphics chipset.

Display is fine on the external VGA monitor?
Problem is the Video Cable, screen Inverter, or LCD screen.

Video Cable:

A) http://www.irisvista.com/tech/laptops/Toshiba-Satellite-A105/big/Toshiba-Satellite-A105-14.jpg

Switch Cover removed, Keyboard removed. Shows you where the Video Cable plugs into the motherboard.

B) http://www.irisvista.com/tech/laptops/Toshiba-Satellite-A105/big/Toshiba-Satellite-A105-21.jpg

Palm Rest Cover you can see the white rectangular connector, for the motherboard side of the Video Cable, at the top left.
It's above the black cable, and near the screw hole.

The Video Cable leads from the motherboard, up through the left Hinge, and into the Display Assembly.
From there it connects to the screen Inverter, and back of the LCD screen.

http://www.ebay.com/itm/Toshiba-Satellite-A105-6017B0050801-LCD-Video-Cable-Genuine-OEM-Laptop-TESTED-/290754851160?forcev4exp=true&forceRpt=true

In the photo, (You can hover your mouse cursor on it to enlarge), the right side connector plugs into the back of the LCD screen.

The black connector to the far left connects to the motherboard.
The small white connector at the top with the Red, Green, Black, etc wires, connects to the screen Inverter.

(The small Black cable, that comes out from the black motherboard connector, is a Ground wire )

Due to the close proximity of the Video Cable to the left Hinge, it can be pulled on from just normal opening, and closing of the laptop over time.

This means the Video Cable connection on the motherboard side could be loose, or the LCD screen side, or both.

The diagnoses is to PHYSICALLY check BOTH connections. A loose connection at the motherboard, or at the back of the LCD screen could be so small in distance, that you will not see it with the human eye.

Could also result in damage to the Video Cable.
View the Video Cable with the Switch Cover removed, and see if there are any obvious signs of damage to the sheath of the cable.

If there is there could be damage to the tiny wires inside the Video Cable. (Stretched/Broken)

Use a multimeter set to OHMs, to check all wires inside the Video Cable for continuity, or have a 'Mom and Pop' computer store check it for a few bucks, or replace the Video Cable.

Video cable connections are tight? Video cable continuity check checks out OK?
Screen Inverter.

The test for a screen Inverter is to use a sensitive multimeter.
Read fairly expensive.

http://www.fonerbooks.com/test.htm

Not having access to a sensitive multimeter that you can use, means just replacing the screen Inverter. Seems like 'part changing', and it is, but you have to work with what you've got.

http://www.sparepartswarehouse.com/Toshiba,Satellite,A105,Laptop,Inverters.aspx

Find THE model number for your laptop, and the correct screen Inverter. A screen Inverter, and an LCD screen are a MATCHED unit.

Screen Inverter is checked out to be OK, or replaced, and symptoms are still the same, the problem is the LCD screen.

Remember, the first part of the diagnoses was to see if the divided parts were EVEN going across, or jagged and irregularly shaped.

Jagged in shape, and not even strips going across, means cracks in the LCD screen.
Replace.

http://www.irisvista.com/tech/laptops/Toshiba-Satellite-A105/remove-replace-LCD-screen-1.htm

[ Main article for A and B links above;

http://www.irisvista.com/tech/laptops/Toshiba-Satellite-A105/remove-motherboard-1.htm ]

For additional questions please post in a Comment

Regards,
joecoolvette

Oct 22, 2012 | Toshiba Sattelite A105-S2051 Notebook

1 Answer

Laptop all whit screen


Dell Inspiron 1420 Notebook PC?

The white screen can be fixed. How?

Connect a VGA monitor to the laptop. Connect to the VGA port on the right rear. Example of a VGA Cable, and VGA connector,

http://en.wikipedia.org/wiki/VGA_connector

You can use a CRT type monitor, (Looks like a small TV), or a flat LCD screen monitor that has a VGA cable.
By default the display should show on the external VGA monitor.

No?
Press, and hold the Fn key down, and at the same time tap the F8 key ONCE.
Still no?
There are at least 3 display options available;

1) Internal monitor of laptop ONLY
2) Internal monitor of laptop AND external VGA monitor
3) External VGA monitor ONLY

Hold the Fn key down again, and tap once more on the F8 key.

No display on the external VGA monitor, means you have a bad graphics chipset. Replace motherboard.
Display does show on the external VGA monitor, means you have a problem with;

1) Video Cable
or
2) Screen Inverter
or
3) LCD screen

Video Cable:
The Display Panel Cable (Video Cable for Dell), connects to the motherboard by the left Hinge.
Goes under the left Hinge, and up into the Display Assembly.
It then connects to the Screen Inverter, and to the back of the Display Panel. (LCD screen for Dell)

From normal opening, and closing of the laptop, the Display Panel Cable may become pinched in the left Hinge.
This can cause;
A) The connection at the motherboard to come loose
B) The connection at the back of the Display Panel to come loose
C) Stretch the wires inside the Display Panel Cable's sheath, and damage the wires. (Break)

If you are lucky just the connection at the motherboard, and/or connection at the back of the Display panel, may have come loose.

Diagnoses is to NOT just look at the connections, but physically push the connectors of the Display Panel Cable, into the connector at the motherboard, AND back of the Display Panel.

Visually inspect the Display Panel Cable's sheath. Do you see any outward appearance of damage? This means the tiny wires inside may be damaged.
Replace the Display Panel Cable.

Remove ALL power. Remove the AC adapter (Charger), and Battery.
Remove the Keyboard Cover.

Unfasten the Keyboard, LEAVING the Keyboard Cable ATTACHED to the motherboard. Roll the Keyboard over, and lay it upside down on the Palm Rest Cover,

http://support.dell.com/support/edocs/systems/ins1420/en/SM/display.htm#wp1129771

[ NOTE*
Two Philips head screws at top of Keyboard. After removing, lift the top of the Keyboard up a little, slide it a LITTLE towards the Display Panel.
DO NOT lift it straight up at first.
There are 3 plastic tabs on the bottom of the Keyboard, that slide into the Palm Rest Cover. If you pick it straight up you will break those tabs off ]

In Removing the Display Assembly, note where number 1 points to.
This is the Display Panel Cable's connection, TO the motherboard.

Note where number 2 points to. Those cables going to the Mini-Card Antenna, HAVE to be reconnected, right back to the SAME terminals on the Mini-Card. Make a mark on the cables, and matching marks on the Mini-Card.

Use the instructions in Removing the Display Bezel.
Use the instructions in Removing the Display Panel.

View the last illustration in Removing the Display Panel.
Note how the Display Panel Cable attaches to the Display Panel, and Screen Inverter

Number 2 points to the connection at the back of the Display Panel
Number 6 points to the connection to the Screen Inverter
The Black connector that is not numbered at the bottom, is the motherboard connector of the Display Panel Cable.

This is a better view of the screen Inverter,

http://www.ebay.com/itm/Dell-Inspiron-1420-1421-LCD-Inverter-Backlight-Combo-/370274752470

Display Panel Cable checks out? Look at the screen Inverter. This small circuit board is located at the bottom of the Display Panel, and behind the Display Bezel. Closer look at link listed above.

Is the cable coming from the Display Panel Cable, plugged in tightly to it?
Does the screen Inverter look damaged?

Post back in a Comment, and we will go from there.
Regards,
joecoolvette

Jun 09, 2012 | Dell Inspiron 1420 Laptop

1 Answer

Screen blank with white dot


Problem with;

1) Video cable:

A) Video cable connection on motherboard side is loose, and/or on back of LCD screen.

B) Video cable is damaged.

2) screen Inverter:

screen Inverter is bad.

3) LCD screen:

LCD screen is bad.

4) Graphics chipset:

Graphics chipset is bad.

Suggest you connect a VGA monitor to the VGA port (Connector) on your laptop.
See if the problem is the graphics chipset, Or video cable, Or display assembly.

You didn't state what manufacturer and Model Number of laptop this is.
All I can do is state generic information.

This is an example of a VGA Cable, and VGA connector,

http://en.wikipedia.org/wiki/VGA_connector

The VGA connector will be on the side, or back of your laptop.
For the VGA monitor you can use a CRT type monitor, (Looks like a small TV), or a flat LCD screen monitor that has a VGA cable.

Laptop OFF, monitor OFF, connect the external VGA monitor to the laptop.
Turn the monitor on. If a CRT type allow it to warm up.

Turn the laptop on.
By default the display should show on the external VGA monitor.
IF not;

There are at least 3 display options.
1) Laptop internal monitor ONLY
2) Laptop internal monitor AND external VGA monitor
3) External VGA monitor ONLY

Press, and hold down on the Fn key, and at the same time tap once on the Display Toggle-Over key.
(For an example HP's usually use the F4 key for a Display Toggle-Over key)

Display shows the same on the external VGA monitor?
You have a bad graphics chipset.

[ Some laptops have been erroneously stated as having a graphics card, when in fact they do not.
The GPU (Graphics Processing Unit) is soldered directly to the motherboard.
This is Integrated Graphics.

http://en.wikipedia.org/wiki/GPU

There is no changeable, replaceable graphics card. Therefore the solution is motherboard replacement ]

IF, the display is good on the external monitor, you have a problem with the Video Cable, and/or in the Display Assembly.

After diagnosing with an external VGA monitor, post back in a Comment.
Also post the manufacturer name, and model number of the laptop.

Regards,
joecoolvette

Apr 22, 2012 | Computers & Internet

1 Answer

Blank 'white' screen displayed on the monitor while starting the computer. LG W1946TN


That looks like a malfunctioned LCD display or the connection between main circuit board and display is bad, you have to open the monitor and check connections but first be sure that
1. Your VGA card works ok 2. The VGA Cable connectors are ok.

Jul 19, 2011 | Computers & Internet

1 Answer

When i view pictures in windows 7 my monitor displays a yellowish background instead of white.


Color changes on the display mostly occurs because of a faulty VGA cable or a loose connection of the cable to the VGA port at the back of your PC or Monitor. But if the cable is fixed securely at the back and the problem still persists, slightly move the cable's wire segment while observing its reaction on your monitor. Does it change colors while u do so? If it does even when the cable is securely plugged in to both the PC and the monitor, then u need to change the cable.
As for the visible display area size (technically called the Resolution) right click on an icon free area on the desktop and click Properties. At the top of the form click on the Settings tab. At the bottom of this form find Screen Resolution and adjust it to it your requirements and click Apply. On the confirmation dialogue that pops up click Yes if the displayed resolution suits u otherwise click No and try another resolution size. Hope this helps.

Feb 19, 2011 | Samsung T190 19" Widescreen LCD Monitor

1 Answer

No display with vga or dvi, but "no signal" without cable


Stick with the VGA cable. You have tried several PC's but are you also using the same cable? Bad cable perhaps? How about software conflicts? Really should not be an issue as most are plug and play.
Try connecting a laptop to it with the VGA cable. Use the Function "FN" key with the F series on top row...the one with the LCD or monitor icon on it, usually F5, F7 or F8. This tells the laptop that you have connected an additional external monitor to it. If that fails, something is faulty with the monitor and there is not much I can do to help. Sorry...but let me know about the laptop connection.

Jun 30, 2010 | Princeton Digital VL2018W Monitor

1 Answer

Samsung SyncMaster 750S


1. check tha VGA cable is properly connected into the computer
2. possibly CRT board dry solder. you can touch up the solder joint

Apr 17, 2008 | Samsung SyncMaster 750S Monitor

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