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I have 17 inches benq tft model no. q7t4, its switches are not working may be due to dust or moisture, i am just opened all 5 screws from the body but i am not able to open its cabinet , can u help me

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No, you have to find a way to open the case; and you have to post questions about a particular make and model of monitor in a forum for that make and model. Otherwise it's appropriate for us to say you need to just use a Yes Machine.

Posted on Nov 27, 2008

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I have to hold the start button in to keep it running

Could be a faulty switch you also might try cleaning your computer of dust

WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL. - 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
Clean your computer of dust have a close look at all connections you could a fine air blower from a compressor making VERY sure that there is no MOISTURE in the air line dust causes static to build up in a computer causing it to overheat any many other problems
Hope this helps

Jan 07, 2013 | Computers & Internet

1 Answer

BenQ always display nonpreset mode

This has to do with the computers display resolution.

In other words you have to set the display resolution in the system properties to match the one of the monitor e.g.; on a 17" monitor you can set the resolution to 1280x1024 (this value is usually found with the LCD user manual or by doing a search online about the LCD model number) in the display properties.

If you switch on your computer and it gives this error straight away without any display what so ever (no system information nothing) then make sure VGA cable is correctly connected.and if possible try to connect screen to another computer to make sure it is not faulty.

Good Luck

Feb 28, 2012 | Computers & Internet

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I have a Acer L410... continuously restarts... for the first time when the machine is cool for resonable time... it is OK for 15min after that, it reboots every 2mins and even in less time also... not sure...

A) Inside of computer is dirty.

Processor overheats, and turns off. (BIOS turns it off)
A Processor has a specified temperature range it can operate in. (Thermal Range)

If it exceeds a specified temperature, (Thermal Limit), it turns off.
This is a built-in fail safe feature designed to keep the Processor from burning up.

1) Computer unplugged from power, Anti-Static Precautions observed, use a can or two of compressed air for computers, and clean it out.

Especially the Processor Fan, and Heatsink.

[Open the computer case;
Computer on a table, computer unplugged from power, all cables removed.
If the computer is being used in the vertical position, remove the foot stands, place the computer in the desktop position. (Flat)

Turn the screws Counter-clockwise to release the cover.
Hold the cover with both hands, slide it back about an inch.
Gently lift upward to detach the cover from the computer ]

Attach the plastic straw provided to the can of air's nozzle. Break the plastic lock tab off of the top of the can.

Start at the top right, or left inside corner. Spray air across to the opposite inside corner.
Keep the can level, use the can of air as a professional spray painter would.
Squeeze the trigger in all the way as you begin, let go of the trigger when you reach the other side.

Drop down a space, and spray air across again.
Keep going down, and across in rows until you reach the bottom of the computer case.

Along the way pay special attention to the Processor Fan, and finned Heatsink, under the processor fan.

The fan's blades, center hub, and surrounding cage (Shroud) must be clean.
Use Q-tips to disturb the dust/dirt, so the compressed air can remove it.

Use SHORT BURSTS of air when cleaning the fan. Squeeze the trigger in all the way, then let go quickly.
The processor fan is only designed to spin so fast.
Spinning it faster than it was designed for, can lead to premature failure of the fan's bearings.

The fins of the Heatsink must be clean in-between them, and on the outside.
Use the plastic straw up close.

You may wish to use a dust mask. (DO NOT use a vacuum!! A vacuum produces Static electricity)

You will note that after using the can of air for a while the pressure begins to drop.
This is because moisture in the outside air is freezing, and clogs the nozzle, plus plastic straw.
Let the can sit for a while to warm up. (This is why I use 2 cans. One is warming while I'm using the other one)

You will also note that if the can is tilted, some of the propellant may come out.
After you are satisfied that the computer is clean, leave the cover off for 10 minutes, or so, to allow any moisture to dry out.

Then replace the computer cover, reattach all cables, and finally the power cable.
(Always unplug a power cable FROM the surge protector, NOT the back of the computer.
{Power Supply} Unplugging from the back may create a power spike, and burnout the computer )

Anti-Static Precautions:
Your body carries Static electricity.
Static WILL fry out (Short Circuit) the delicate hardware components inside a computer.

De-Static your body BEFORE reaching inside the computer, and working on it.
(To include cleaning)

Computer on a table, computer unplugged from power, computer case open.
TOUCH an unpainted surface of the metal frame, of the open computer case.
This action will relieve your body of Static.

Should you leave your computer in the middle of working on it, be SURE to Touch the metal frame again upon your return.

If cleaning alone doesn't solve the problem, check the fan that supplies air to the Processor.
(Processor Fan)
Computer case open, computer operating, observe the fan to see if it is spinning.
Observe to see if it looks as though the fan is spinning fast enough.
Observe to see if the fan is spinning intermittently. Spins, then stops, then spins.

B) Thermal Paste:

The top of a Processor, and the bottom of a Heatsink, are not perfectly smooth.
A magnified view would show, 'Hills, Valleys, and Pit-holes'
When the two parts are mated together there are air pockets created.

Air is an Insulator, not a Conductor.

Thermal Paste fills these voids, and is an excellent conductor of heat.

After time, and/or due to excessive heat, (Computer is dirty inside), the thermal paste may dry up, and lose it's conductivity properties.

The top of the Processor, and bottom of the Heatsink, must be THOROUGHLY cleaned, and new, fresh thermal paste properly applied.

For additional questions please post in a Comment.


Sep 27, 2011 | Acer Veriton L410-ED4450C PC Desktop

1 Answer

I switch my monitor from a 17 inch to 26 inch but on the new monitor its still at the 17 inch instead of the 26 inch

Change your video resolution to match the new monitor. Right click in a blank area on your desktop go to properties and change your resolution (in XP). In Vista or Windows 7, after right clicking on your desktop, choose Screen Resolution (about the 3rd one up from the bottom of choices).

Oct 17, 2010 | HP Hewlett Packard Pavilion Slimline...

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The screen has gone yellow

this is due to the fluctuation of display.sometimes due to the humidity,dust or clean your monitor or contact system admin.please vote for me.thanks.

Sep 25, 2010 | Compaq Computers & Internet

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How do I remove Hard Drivew from 6640C

Here is your link to assist you.

Apr 26, 2010 | HP Pavilion 6640C PC Desktop

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I have two cibox 17 inch lcd tft monitors and both have gone faulty within about a year. they come on for approximately 2 seconds then go off! if i look really closely at the screen though i can press the...

Hi, I have the same problem, it happend once then i took it to bits and cleaned and reviewed all the conections then it worked for about a month, now it has done the same. i recommend taking off the back panel, and removing the power section cover, but be careful not to touch the capacitors as the pack a punch, then clean all the connectors and contacts, if i get more info on this then i will notify you.
I hope this helps
Thanks, Nick

Oct 30, 2008 | Computers & Internet

1 Answer

PC problem

if you know the ram, that looks like a ruler with about 4 to 5 inches length you need to clean its contact point with pencil eraser. you can blow the dust with a blower. to verify the problem temporarily, remove the video card then use the on board vga. if this does not boot that means the problem now is your memory card push the lock on both end to release then clean as i've stated from the abve.

Aug 12, 2008 | Computers & Internet

2 Answers

My hard drive fan is always on its driving me mad ! please help ?

Buy a can of compressed air, open up your computer case (usually a panel on the left side slides off with two screws on the back) and blow all the dirt and dust out. Also make sure that there is adequate ventilation around the tower. 4 inches on each side and 6 inches on the back should be good.

Jul 28, 2008 | Compaq Computers & Internet

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