Question about ViewSonic Optiquest Q7b Flat panel TFT 17" Monitor

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Loose connection When I move my video cable at the back of the monitor, the screen goes crazy. How do you open up the monitor to locate the bad connection?

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To open the Monitor take off the base (4 screws). Usually there is a little black covering over it, which just pops off. After that you will see another two screws underneath that connect the back panel to the front (which hold in the button board at the bottom of the screen). From There I just take a Screw driver and start from the bottom where you see a larger gap, and begin prying softly just enough to get past the tabs. I do this all the way around the screen. On the Q7 Monitors there is actually still one cord connecting the back panel to the videoboard. Just reach under and unplug this cord and your able to slid it down the video connection cord so you can get to the inside. Make sure the the cords are connected fully and that you have the cord grounded like the video board. As long as that screw is in, it should not come loose.

Posted on Jan 08, 2009

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Toshiba laptop pas409e-d screen is black


Step 1:
WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL. http://www.kitchentablecomputers.com/static.php - rules Only work inside the computer case when the power has been switched off and disconnected. Never open the power source. Some of the below steps recommend removing physical parts within the computer. While in the computer it is highly recommend that you be aware of ESD and its potential hazards Causes a Computer Monitor to Go Blank b> While a blank screen may be caused by a general power outage, more often it's a problem with the screen itself. It could be a loose video or power cable going to the monitor. If that's the case, you can get the screen working again and be back in business in a few minutes. b> Power Problems All the power might be off due to a bad outlet, switch, fuse, or circuit breaker. If you hear no sound coming from the computer and its power light is off, check the power connection and breaker or fuse. Video Cable Many times the cause of monitor blackouts is a loose video cable connection. This might happen if you move the monitor or the cable. The video cable runs from the back of the computer to the monitor. It has a multi-pin connector on each end and both of them screw down securely. If the screws aren't tight, either connector could become loose. If that happens, the video signal could stop suddenly and make the picture go blank. Check both ends of the connector to make sure they're firmly seated and the screws are tight. The cable itself might be bad.This is unlikely, but possible. b> Display Power The monitor must have power. If the power light isn't lit on the monitor, it may have been turned off or become unplugged. Press the power button to make sure it wasn't accidentally turned off. Make sure the monitor is plugged in. If it's connected to a power strip, check that the power strip is on. If that checks out, unplug the monitor and try a different outlet. Power strip sockets can sometimes fail. Flat-screen monitors may have a power-brick-style adapter. It, too, has connectors. Follow the power cable from the monitor's power plug back to the monitor. About halfway up you'll find a thick rectangular plastic brick. The power goes into a modular-style equipment socket. This can become loose. Follow the wire the rest of the way to the monitor. It connects to the back of the screen with a small round plug. Check that it's firmly plugged in. If everything's plugged in right and the power light on the monitor's still off, the power brick might be bad. b> Video Card Some computers have a separate video card inside. It may come loose and cause a blank screen. If this is the case, open the computer and inspect the video card. Sometimes removing and reseating the card will fix the problem. If it has to be replaced, most video cards are not expensive.
b>

Feb 15, 2013 | Computers & Internet

1 Answer

My acer monitor come on and screen go blank


Step 1:
WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL. http://www.kitchentablecomputers.com/static.php - rules Only work inside the computer case when the power has been switched off and disconnected. Never open the power source. Some of the below steps recommend removing physical parts within the computer. While in the computer it is highly recommend that you be aware of ESD and its potential hazards Causes a Computer Monitor to Go Blank b> While a blank screen may be caused by a general power outage, more often it's a problem with the screen itself. It could be a loose video or power cable going to the monitor. If that's the case, you can get the screen working again and be back in business in a few minutes. b> Power Problems All the power might be off due to a bad outlet, switch, fuse, or circuit breaker. If you hear no sound coming from the computer and its power light is off, check the power connection and breaker or fuse. Video Cable Many times the cause of monitor blackouts is a loose video cable connection. This might happen if you move the monitor or the cable. The video cable runs from the back of the computer to the monitor. It has a multi-pin connector on each end and both of them screw down securely. If the screws aren't tight, either connector could become loose. If that happens, the video signal could stop suddenly and make the picture go blank. Check both ends of the connector to make sure they're firmly seated and the screws are tight. The cable itself might be bad.This is unlikely, but possible. b> Display Power The monitor must have power. If the power light isn't lit on the monitor, it may have been turned off or become unplugged. Press the power button to make sure it wasn't accidentally turned off. Make sure the monitor is plugged in. If it's connected to a power strip, check that the power strip is on. If that checks out, unplug the monitor and try a different outlet. Power strip sockets can sometimes fail. Flat-screen monitors may have a power-brick-style adapter. It, too, has connectors. Follow the power cable from the monitor's power plug back to the monitor. About halfway up you'll find a thick rectangular plastic brick. The power goes into a modular-style equipment socket. This can become loose. Follow the wire the rest of the way to the monitor. It connects to the back of the screen with a small round plug. Check that it's firmly plugged in. If everything's plugged in right and the power light on the monitor's still off, the power brick might be bad. b> Video Card Some computers have a separate video card inside. It may come loose and cause a blank screen. If this is the case, open the computer and inspect the video card. Sometimes removing and reseating the card will fix the problem. If it has to be replaced, most video cards are not expensive.

Feb 15, 2013 | Acer Computers & Internet

1 Answer

White screen acer


White screen when you start the laptop, and then when you connect an external VGA monitor, you can only operate in Safe Mode?

Or white screen except when you are Safe Mode?

Doesn't matter anyway, just wanted to see what you are stating.

1) Have you connected an external VGA monitor to the laptop, and seen if you get a good display on the external VGA monitor?

No display on external monitor?
You have at least 3 display options available;
A) Internal monitor of laptop ONLY
B) Internal monitor of laptop AND external VGA monitor.
C) External VGA monitor ONLY

Hold the Fn key down, and tap once on the F5 key.
(The F5 key is the Display Toggle-Over key)
Still no?
Hold the Fn key down again, and tap once more on the F5 key.

Good display on external VGA monitor?
Problem is the Video Cable, or inside the Display Assembly.

White screen on external VGA monitor also?
Problem is the graphics chipset.

[Actually it is probably inadequate cooling for the graphics chipset, and this makes a bad contact of graphics chipset TO motherboard. If this is found to be the problem I can explain further, and in much more detail ]

Inside the Display Assembly:

A) Screen Inverter if it is CCFL backlighting.
May or may NOT be a screen Inverter if it uses LED backlighting.

[ CCFL - Cold Cathode Fluorescent Lamp
LED - Light Emitting Diode ]

B) LCD screen.

Video Cable:
The Video Cable connects to the motherboard, in an area either under the Keyboard, or under the Switch Cover, or bottom of the laptop.

[Switch Cover,
Goes by many names. It is the strip of plastic above the Keyboard, and below the LCD screen. Usually has the Power On button, and LED indicator lights; plus speakers, sometimes ]

From there the Video Cable goes under the left Hinge, and up into the Display Assembly.
If a screen Inverter is used, a small cable comes from the main cable, and plugs into the screen Inverter.
The main cable connects to the back of the LCD screen.

Due to normal repeated opening, and closing of the laptop; the Video Cable may be pulled on.
This can create a bad connection on motherboard side, and/or screen Inverter cable connection, (IF used), or to the back of the LCD screen.

It can also cause damage to the Video Cable.
(Stretched/Broken wires)

Once you post the product number I can guide you step by step, show you the components I'm talking about, and track down a Service Manual link, and possibly pictorial disassembly information.

The Video Cable connections are checked first.
A loose connection can cause what you are seeing.

The sheath of the Video Cable is also scrutinized for damage.
Obvious damage to the sheath, may mean damage to the tiny wires inside the Video Cable.

Another thing that can cause what you are seeing.

Video Cable connections prove not to be the problem, then the Video Cable is to be removed, and a continuity test performed on it.
Multimeter set to OHM's. (1K)

If a multimeter is not at your access, then suggest taking the Video Cable down to the nearest small computer shop, and have the resident tech check it for continuity. Should only be a couple of bucks.

YOU MUST rule out the Video Cable as the problem, before going on.

Video Cable checks out?
Then if a screen Inverter is used, this is the next component in the diagnostic flowchart.

Problem is this; it requires a sensitive multimeter to test a screen Inverter. Think fairly expensive,

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

The plastic frame in front of the LCD screen, is the Display Bezel.
The screen Inverter is located behind the Display Bezel, and mounted down towards the bottom of the LCD Screen Frame.

Due to the multimeter issue, the above noted ease of accessing to replace, and the usually low cost of the screen Inverter; most decide to just replace.

Screen Inverter replaced? Same problem?
The problem is the LCD screen.

No screen Inverter used? The problem is the LCD screen.

Video Cable; Usually around $9 to $20
Screen Inverter; Same.
LCD Screen; from $70 to $240. Just depends on what Lenovo laptop we're talking about here.

This is why you diagnose first.
Would be foolish to assume the problem is the LCD screen, and purchase one; when the problem may have just been a loose Video Cable connection, or one of the $9 to $20 components stated above.

Ready to diagnose?
Post the Product Number back in a Comment.

Regards,
joecoolvette

Jan 22, 2013 | Acer Computers & Internet

2 Answers

Screen comes on with loads of colouerd lines


Suggest you diagnose, and see if the problem is in the Display Assembly, Video Cable, or graphics chipset.

1) Laptop OFF, monitor OFF, attach a VGA monitor to the laptop.

Since you didn't post the model number of the laptop, (Is it an MSI laptop also?), I can only post generic information.

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

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

You can use a VGA monitor that is the CRT style, (Looks like a small TV), or a flat LCD screen monitor that has a VGA cable attached.

Monitor connected to laptop turn the monitor on. If a CRT style allow it to warm up.
Turn the laptop on.

By default the display should show on the external VGA monitor.
If not, press, and hold down on the Fn key, and tap the Display toggle-over key.

[ The Display toggle-over key is one of the Function hotkeys at the top of the Keyboard. It may be F4, or F5 for example. The key will have a monitor symbol on it, and perhaps an arrow pointing to the side ]

If you hold down on the Fn key, and tap the Display toggle-over key once, and nothing happens, hold the Fn key down again, and tap once more on the Display toggle-over 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

If the display is still the same on the external VGA monitor, as it is on the laptop's internal monitor, you have a bad graphics chipset.

A) IF, the display is Fine on the external monitor, you have a problem with the Display Assembly, or the Video Cable.

B) IF, the display on the external VGA monitor is the same as the internal monitor of the laptop, you have a bad graphics chipset.

I have not seen any service bulletins stating problems with graphics chipsets, or the mounting of the graphics chipset, for MSI laptops/netbooks.

If the graphics chipset is bad you are looking at a motherboard replacement.

Video Cable:
This flat ribbon cable connects to the motherboard, goes up under the left Hinge, (Probably), and connects to the back of the LCD screen.

From opening, and closing during everyday usage, the video cable may have been pulled on, causing damage to the cable. Or pulled it loose from the motherboard connection, or LCD screen connection.

Dropping the laptop will also pull on the Video Cable, if the laptop was open when dropped.

[ The Video Cable plugs into the motherboard, and plugs into the back of the LCD screen. This is an example using an HP dv4 series of Notebook PC,

http://www.insidemylaptop.com/replace-ccfl-lcd-screen-hp-pavilion-dv4-laptop/

Scroll down to Step 19, to see an average Video Cable, and how it connects to the back of the LCD screen.

[ I posted a solution earlier to a problem similar to this, and the asker found the Video Cable was loose on the back of the LCD screen,

http://www.fixya.com/support/t10155788-compaq_presario_cq62_238dx_felloff

The connector on the other end of the Video cable, that plugs into the motherboard, is similar to the LCD screen connector ]

ALL power is removed from the laptop. AC adapter (Charger) and Battery. Anti-Static Precautions are followed.

Then the laptop is partially disassembled down far enough, to see if there is obvious damage to the video cable on the motherboard side, and/or if the connection of the Video Cable to the motherboard is loose.

Look at the sheath of the video cable, and see if there are obvious signs of damage. Damage to the sheath of the cable, may be an indication that the tiny wires inside the cable, are damaged. (Stretched/Broken)

To test the Video Cable to see if it is good, the Video Cable needs to be completely removed, and a continuity test performed.

{A multimeter is set to Ohm's. Each wire is checked in the Video Cable to see if electricity will flow through it. Continuity.
If not the wire is broken.

An economical multimeter that will suffice for this test, can be purchased for around $5 to $12. Available in a multitude of stores. An auto parts store is but one example. Analog, or digital is fine.

If this is not feasible, and/or the knowledge to use the multimeter is not available, ( I can guide you, however ), perhaps take the Video cable to the nearest computer repair shop, and have them check the continuity }

Video Cable connections prove to be tight on the motherboard side, AND on the LCD screen side, go to the screen Inverter.

Primer:
An LCD screen does not produce light. (Or not enough light)
An additional light source is needed.
A Backlight is the additional light source.

A Backlight can be a CCFL, or a series of LED lights.
Don't know the model number of your MSI (?) Notebook PC, or I could tell you which Backlight technology your laptop uses.

A CCFL is a Cold Cathode Fluorescent Lamp.
Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.

(Average size of a CCFL is 2mm Wide, and 334mm Long. That is approximately a little thicker than 1/16th of an inch Wide, (.078 thousandths), and a little over 13 inches Long)

A screen Inverter is used to convert the power (Electricity) from the laptop, for the Backlight, and LCD screen.

A screen Inverter is a small circuit board located behind the Display Bezel, (Also referred to as Display Mask), and at the bottom of the LCD screen.

90 PERCENT OF THE TIME the fault can be attributed to a bad screen Inverter


My thoughts are that you have either a bad connection for the Video Cable, and/or it is damaged, OR you have a bad screen Inverter.

I have access to Service Manuals for MSI Notebook PC's, but only certain models.
However post the model number, (Located on the Bottom of the laptop, in a white service tag, or sticker), in a Comment.

After you have disassembled enough laptops, Julie, they all seem to follow the same basic disassembly pattern.
We'll see what we can do.

Regards,
joecoolvette

Jan 16, 2012 | MSI Computers & Internet

1 Answer

My Lab top SCREEN goes WHITE when I Have It For about 10 minutes or sometimes less


What can you do if the laptop LCD screen turned completely white? From my experience I can tell that this problem may be related to the following:
1. Loose connection between the video cable and the LCD screen.
2. Defective LCD screen.
3. Defective motherboard (I assume the graphics card is integrated into the motherboard).

Most likely you still can use the laptop with an external monitor. Just connect the monitor to the VGA port on the back or side of your laptop and then switch the video output from internal to external mode.
On Toshiba laptops you can toggle between internal and external screens using Fn+F5 keys. Hold down Fn and press on F5 until you get video on the external monitor.
On IBM laptops use Fn+F7.
On HP laptops use Fn+F4.

It’s possible that you have to use a different key combination on your laptop but you get the idea.
On some laptops, in order to be able to use the external monitor, you have to connect it to the laptop and then restart the laptop so the external monitor is detected by the laptop.

I noticed that in some cases the laptop screen may turn white because of poor connection between the video cable and the LCD screen. If you want to check this connection, you’ll have to take apart the display panel because the connector is located on the back side of the LCD screen.

I always check the video cable connection first. Reconnecting the video cable may fix your problem.
If reconnecting the video cable doesn’t help, most likely you have a problem either with the LCD screen or with the motherboard.

The best way to find out witch one is causing the problem is testing the laptop with another working LCD screen. Without this test you’ll have to guess because as I mentioned before this could either bad motherboard or bad LCD screen.

You’ll have to disconnect the video cable from the LCD screen and the inverter board . After that you connect another working screen and test video. If you get a steady picture on the test screen, the problem is the original screen, if you do not get a steady picture on the test screen, you have motherboard issues.

Nov 29, 2009 | Computers & Internet

1 Answer

Have emachines W2060. Can't get screen to show


Hi Joe,

Could be one of several things:

1) Monitor cable connection loose.
2) Video card (if you have one) not seated, or bad.
3) RAM module not seated, bad, or wrong kind. (If you have not messed with the RAM, probably not one of these.)
4) If your video is integrated into the motherboard (no video card) your motherboard may be bad. Installing a separate card could correct this.
5) Bad monitor.

Have you made any changes to your system when this happened?

Try to connect another monitor/cable to your computer and try your monitor on a friend's computer to see if it works.

Comment back with any updates.

Thanks for using Fixya.

Jun 14, 2009 | E-Machines (308714) Motherboard

1 Answer

My problem with this screen is that when I try to go to another web site the whole screen starts flickering and I can't go to another web site. Happens once in awhile, sometimes it works great and then all...


Could be a loose cable inside off the monitor. There is a cable that hooks into the back of the lcd and if that is even loose by a little bit it can make the screen act crazy. If you can get the back cover off of the monitor, try to unseat and reseat that cable to see if the problem goes away.

If you do that and it still exists then the lcd is bad and the whole monitor needs to be replaced.


May 02, 2009 | Acer V193w LCD Monitor

1 Answer

Toshiba L25-1216 LCD Screen cuts out or has


Most likely you have a loose video connection. Reseat the ribbon cable that connects the LCD screen to the motherboard.
This connector is located under the plastic panel that holds the power and various switches near the bottom edge of the LCD screen.

Apr 04, 2009 | Toshiba 15.4-inch 1.6GHz 40GB Laptop PC...

2 Answers

Images and letters are fuzzy on my Westinghouse Monitor


Your monitor settings are not correct or you have a bad monitor cable. Wide screen settings are sometimes hard to figure when you have a wide screen Westinghouse mntr. You have tried all common resolutions? 1024 x 768, 1280 x 800, 1280 x 720? I assume your video drivers are the latest?You have tried all common resolutions? 1024 x 768, 1280 x 800, 1280 x 720? I assume your video drivers are the latest? That monitor is a **** btw! take it back to Best Buy. No other store sells them that I know of.

Jan 15, 2009 | Computers & Internet

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