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Wanting to use tv as monitor with benq a52 v03 joybook

I have connected the benq and the samsung lcd tv using the 9 pin vga connections. switched tv on and selected PC as source. No result. Is there another necessary step or more to enable the laptop to use the tv as a monitor

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  • iananddesley Jun 15, 2009

    Thanks for that info. Did as instructed and laptop screen blanked out as expected. However the TV screen did not take over. A message came up saying "mode not supported"

    Any more ideas on that one?

  • iananddesley Jun 15, 2009

    My laptop runs at 1280 X 800. The TV is a 55" and runs way above that. Shouldn't it be able to handle the lesser figure?

  • iananddesley Jun 16, 2009

    Well, you were right and wrong!! Resolution was the issue but in the opposite direction. Needed to set laptop up to 1920 X 1080 to get the image to appear. Hertz at 60 was OK on each.
    All now working perfectly which is great.
    Thanks a lot for your input.




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Yes, you need to press the key combination for your laptop to direct the video output through the external VGA port. It varies by laptop, but it usually involves the use of the Function (Fn) key and another key like F4...look for a picture of a screen in the same color as your function key.

Posted on Jun 15, 2009

  • Kevin Shafer
    Kevin Shafer Jun 15, 2009

    Try reducing the resolution of your screen; your TV is saying it can't display the current resolution. Try putting it at 800 x 600; it should display that. Then once you get the display you can play around to see what the maximum resolution is your TV will support.

  • Kevin Shafer
    Kevin Shafer Jun 15, 2009

    It just may be an odd resolution. The error you got is because the TV can't display that resolution. So once you get it to display the simple resolution then you can adjust your laptop to something the TV will display.


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In laptops there is a selection where you can set it to display in external monitor. push that key then the laptop display will sw. to external monitor.

Posted on Jun 15, 2009


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Benq joybook a52 windows 7 drivers

Drivers are available at the manufacturers web site.

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What could be the problem of my laptop,after start up a few minute the screen will become full white,the antivirus already expired

Nothing to do with a virus........

Not software related.
It is hardware related.

Problem can be;
A) Graphics chipset on the motherboard
B) Video Cable. (Also known as LCD Cable, and a few other monikers)
C) screen Inverter
D) LCD screen

The method to find what the problem is, is to Diagnose.......

1) Graphics chipset:

Laptop OFF, monitor OFF, connect a VGA monitor to the VGA port, on BACK of the laptop.

(Pretty sad when you go to BenQ's 'support website'.
Couldn't pull a frigging photo up of the Joybook A53, and no User Manual download.
Sure isn't a laptop manufacturer that I would recommend!)

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.

VGA connector (Port), and VGA Cable example,

Scroll down a little for VGA Cable example.

Turn the monitor on. If a CRT type allow it to warm up a little.
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;
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 at the SAME time tap once on the Display Toggle-Over key.

Which key is that? Dunno. Thank BenQ for all of the detailed, wonderful information.........NOT.
It will be one of the F keys at the top of the Keyboard.
F1 through F12.
Usually has a monitor icon on it, and perhaps an arrow on one side.
HP is F4.
Acer usually F5
Toshiba - F8
IBM/Lenovo - F7

Just some examples.

No display showing?
Hold the Fn key down again, and tap once more on the Display Toggle-Over key.

No display on external VGA monitor suggests problem with graphics chipset.

(Most of the time it isn't the chipset itself, but rather it is the MOUNTING of the graphics chipset TO the motherboard.
The graphics chipset is soldered to the motherboard, with a BGA surface mount. Ball Grid Array.
Someone states it has a graphics card? Just laugh, and walk away. No reason to subject yourself to ignorance ]

Display shows on external VGA monitor?
The problem is the Video Cable, or screen Inverter, or LCD screen.

2) Video Cable:

The Video Cable connects to the motherboard, in an area under the Keyboard, or Switch Cover.
[Switch Cover;
The strip of plastic above the Keyboard, and below the Display Assembly.
Has the Power On button in it, for one]

From there the Video Cable goes by the left Hinge, and up into the Display Assembly.
One single cable comes off of the main body, of the Video Cable; and connects to one side of the screen Inverter.
The rest of the Video Cable, or Main body, goes on to connect to the back of the LCD screen.

Just from normal repeated opening, and closing of the laptop; the Video Cable may be pulled on. This chance also increases as the laptop ages. The sheath of the Video Cable, and the insulation on the wires inside the Video Cable; get stiff from age.

(Laptop is 5 years old, right?)

The pulling can cause loose connections of the Video Cable.
Loose on the motherboard side, or single cable connection to screen Inverter loose; or Video Cable connection to back of LCD screen, loose.

ALL power removed, AC adapter (Charger), and Battery; the connections are checked for tightness.
A visual inspection alone will NOT do.
The Video Cable connection MUST be physically checked.
Physically try to plug in tighter.
The loose connection could be so small, that you will not detect it with the human eye.

Pulling on the Video Cable can also damage it.
Stretched/Broken wires inside the Video Cable.
If, after the connections are proved to be tight, and this does not repair the problem; the Video Cable is removed, and every wire inside the Video Cable checked for Continuity.

A multimeter is used, and set to OHM's. (1K)
If this is not feasible for you, suggest take Video Cable down to nearest small computer repair shop, and have the resident tech check it out. Should only be a few bucks.

Video Cable continuity test proves Video Cable to be good, the screen Inverter is next in the diagnosis.

3) screen Inverter:
The screen Inverter converts the power (Electricity), from the laptop; for the Backlight, and LCD screen.
I know your laptop uses a screen Inverter, because it uses a CCFL for a Backlight,

90 PERCENT of the time, the fault can be attributed to a bad screen Inverter.
It is just a small circuit board, and only lasts so long.
HOWEVER, this is a diagnosis, and NOT a guessing game.

To test a screen Inverter requires a sensitive multimeter. Read fairly expensive,

The screen Inverter is located behind the Display Bezel, and mounted towards the bottom of the LCD Screen Frame.

[The plastic thin frame in front of the LCD screen, is the Display Bezel.
The LCD screen is composed of layers. These layers are kept in the factory set alignment, by a metal Screen Frame.
It resembles a picture frame ]

Because of the ease of access to replace, not having access to a sensitive multimeter, and the usually low cost; the screen Inverter is just replaced.

4) LCD screen:

If the Video Cable connections were tight, and Video Cable is good, plus the screen Inverter is replaced, and this does no good; then replace the LCD screen.

Video Cable cost?
Guessing around $9 to $12.
Screen Inverter?
Usually $9 to $20.
LCD screen?
$60 to $225 depending on laptop.

This is why the laptop is diagnosed.
Don't want to spend $225, when a $9 Video Cable, or $9 screen Inverter was the problem.

There is one tool you will DEFINITELY need, for checking the motherboard connection of the Video Cable, along with the basic tools.......

An ESD wrist strap......

Electro Static Discharge
Average cost is $3 to $6.
Connect it's alligator clip to a good ground source.

Need help in disassembling laptop to check motherboard connection, and LCD screen/screen Inverter connection of Video Cable?
Post back in a Comment, or click on Reply at end of solution.

There are no Service Manuals available. (BenQ, remember?)
However I am confidant I can guide you in this endeavor.
9 years at performing this online, (4 here), and over 10,000 solutions on this website. A LOT of them deal with this problem.


[Just to show you basics, here is an online computer repair tech I respect,

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"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
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Atlast I got some help from the right people (Samsung)! I would like to share it with others facing the same problem:

If you are using the D-sub 15 pin jack (VGA Monitor Cable: make sure its 15 pin and NOT 14 pins), follow these steps:
  1. Make sure your TV and computer are off.
  2. Using a 15 pin D-sub (standard) video cable, connect the Video Out jack on your computer's video card to the PC In jack on the back of your TV.
  3. Using an audio cable with a min-stereo plug on one end and two RCA jacks on the other, connect the Audio Out jack on your computer to the left and right PC Audio In jacks on your TV. (Note: If you have your computer connected to separate speakers, you can skip this step)
  4. Switch on the Notebook and Adjust the Resolution (800 x 600 pixels would do). You can go to Control Panel and Adjust the screen resolution. (Keep ‘Screen Refresh rate’ at 60hz in the Monitor Settings)
  5. Switch on the TV and try to Select the Source as 'PC' (you can do this by either pressing the 'Source' button several times on your TV remote or go to the Menu - Setup and Select the 'PC' as source there).
  6. In most cases, after following the above steps, the TV would start to show 'Auto Adjusting' message and it will start showing your Desk top on the TV. But incase it doesn't work, you can do the following:
a. Mostly the problem lies with the VGA cable. Make sure you have the right one (15 pin) and its securely attached at both ends. If you are not using the right VGA Cable, it means that there is no connection between your TV and Notebook. Your TV will show 'PC' in Grey in the Source Input list (Go to ‘Menu’ from the TV remote).
b. Both your Notebook and TV should be switched off when you are connecting the cable otherwise one of them might have a problem detecting the other one.
c. Try Pressing Fn + F5, F6, F7 (depends on which Notebook brand you are using) on your Notebook several times. At times, you will see some signs that the Notebook and TV are trying to connect. Select 'CRT' from list of displays available to you.

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Audio device

Dear Catz ,
you can direct download the sound driver for XP ,of your Benq joybook - A-52 from this site:

Cheerup and be happy Always

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Samsung LCD TV not receiving PC signal

Check your vga cable. Some cables have only 14 pins, some have all 15. The missing pin is pin 9, in the 15 pin cable it carries 5v from the graphics card to the screen. Without that 5v signal most LCD and Plasma television screens won't recognise a PC input. I had the same problem and only managed to fix it when my girlfriend swapped a cable over for me and as she did so glanced inside and said "it's got a bit missing" The cable that came with your PC most likely only has 14 ins as that is all a monitor screen needs.
You can buy a 15 pin cable at most PC or electronic shops, just check that isdoes have all 15 pins befiore you buy it. The cheap ones are just as good as the expensive ones unless you are buying 20 foot cable. For 6 foot cable the cheap ones are just as good as the expensive ones.

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No 9 pin video socket

Most video cards use a 15 pin VGA connector.

There is also a 9 pin VGA connector, but they are a lot less common - I'm guessing this is what you have.

Is the video cable hard-wired into your monitor or is it connected via a plug? If it's a plug, is that a 15 or 9 pin? If it's a 15 pin, then all you need to do is buy a new 15-15pin VGA cable.

If it's hard-wired, you'll need to buy some sort of adapter. These are available and don't cost much either, but you might need to try a more specialist computer store to find one.

Hope this helps!


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