I sparyed air in back to blow dust out and sparked where the power panel is

Unit needs to be taken apart and washed out , also check to see if motor turns freely by hand , clean base of unit fans / blowers and drain ports / channels . Check outdoor motor to see if bearings are tight or fan overheats and cuts off if so replace outdoor motor .

You should clean your computer of dust

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.

Most of the maintenance you will do in the course of your desktop PC's life is software-based: adding and removing programs or updating drivers.

But from time to time, you may need to clean the inside of your desktop computer.

Dust, carpet fibers, hair and smoke can enter the system and clog the cooling fan and other vital components.

Close all of your programs and save your work.

Click "Start" and "Shut down" to turn off your PC.

Then, unplug all of the cables and cords from the back of the tower and move the case to a flat, dry surface where you have room to work.

Press and hold the power button for 10 seconds to clear any static electrical charges from the system.

Let the computer cool off for a few minutes before opening it.

Use a screwdriver to remove the side panel of your PC, if necessary.

Different desktop systems have different ways of being opened.

Older systems those made around 2000 usually have a few captive screws on the back that hold the side panels in place.

Systems made since 2001 or 2002 are usually a lot easier to open and feature a large release button that, when pressed, allows the system to swing open like a book.

Have a close look at your desktop computer, or refer to the user manual if you aren't sure how to open it.

You don't need to remove both the left and right panel.

For low-profile systems that sit horizontally instead of vertically, remove the top panel assembly as

Identify the power supply from the inside.

You can look at the back of the computer to see where your AC power plugs in, and then just follow the part inside.

The power supply has a fan in the back and extends into your system as a large metal box. Hold the compressed air canister upright and spray compressed air around the power supply and fan, using the extended nozzle.

Use the compressed air canister to blow dust and debris out of your system, beginning at the power supply and moving toward the outer edges of the computer.

Blow the dust clear of the PC completely.

Check the side panels for built-up dust, and wipe the panels clean with a dry paper towel.

Reattach the side panels or close the PC, and reconnect it to its cables.


Check you CPU central processing unit make sure its securely seated and has thermal paste it might be getting to hot the thermal paste will help disperse the heat

Thermal compound is a sticky paste that is placed directly onto the CPU.

http://www.hardwaresecrets.com/article/Thermal-Compound-Roundup-February-2012/1490


Allowing for a more direct heat transfer between the CPU and HEAT SINK and preventing air gaps from forming between the CPU and heat sink.

Hope this helps.

Respected sir, well there is a thing you can try before calling to customer care.open up the 1st panel from the sides there would be a arrows at the end.now 1ce you have the1st panel out u will see a frame like structure.It would be full of dust.so carefully remove it from a side.and than wash it with water as well as clean the dust.After cleaning it would be transparent.Than fix every thing again step by step.1st fix the plastic frame and than put the panel back.

Clean the small front projection mirror. That mirror can get dust on it and will cause the projected image to appear dull and dim and cleaning that mirror will usually restore the brightness and crisp details in the image.

Cleaned the filter screen or the coils? There are two coils. The evaporator coil and the condensor. There is the "filter screen" in which you can clean which is located in the back top portion of the panel that is easily accessible. However to clean the coils you need to remove ALL the back screws from the back cover and remove the entire back panel. There you will see both coils. From your statement it sounds like there isn't sufficient airflow over your coils and the freon cannot release its cooling effect into the hot air thus it tends to ice up on the coils. You need to wash out all the lint dust from both coils. You can do this with with air conditioning coil cleaner or for starters use a stiff paint brush and vaccuum. Clean as much debris off as you can, then run the unit. It should last longer than your previous five minutes. If it doesn't work then your in trouble. There is a metering device called a TXV or expansion valve that may have failed causing the freon not to flow freely thoughout your system. However it is a rare occassion that it fails so it should be that the coils are dirty. GOOD LUCK

I am guessing, that you have your board laying flat, and the computer is unhooked from all the cables.
first thing is to make sure that all your sockets are clear of dust by blowing high pressure air to the board (dust is a killer of boards).
ok onto the next step turn the computer over to check for lose screws that might have dropped onto the motherboard
ok next is that all of your cards are clean dust free you can take a static free cloth or high pressure air to clean/clear your cards then replace all the cards and memory sticks
if you have a extra power supply that you know is good or a friend has one thats good try hooking that up first.
If your computer fire's up now then you can try your power supply if dosen't work then you have boiled your problem down to your power supply and that it should be replaced

If the clicking sound is coming directly from the power supply, it could mean any number of things, including a faulty power supply.

If you can open the case cover, check inside for dust buildup. (Note: Make sure the computer is unplugged from the AC power source before doing this!) Try using canned air to blow dust buildup off any heat sinks and fan assemblies you see inside the computer, this includes the power supply as well. A good, general dusting of the backs of drives is also a good idea. Do not tilt or invert the canned air while you are using it, or propellant could be sprayed onto the components!

After cleaning out the PC, put the cover back on, plug the unit in and see if there's any improvement. If not, without testing individual components it would be difficult to troubleshoot your problem. A trained service technician's physical assessment would be a solid next step.

A.Unplug the unit
B. get a air compressor with a air nozzel and vacume cleaner.
C. remove lower panel in back of unit to get to compressor and fan.
D. blow out any dust in coils and surrounding area. Clean fan.
E. put back panel/plug in and try

Hi there.
Its possible that the machines are overheating, take off the side panel and clean the CPU fans and heat syncs.
Get a can of compressed air and clean the dust out of the cases, if you have no compressed air, get a clean, dry, soft paintbrush and a powerful hairdryer, set it to cold air and gently brush the dust away and blow it out with the hair dryer.
I also recommend you take out the system memory and clean the contacts on that too.

Good luck and thanks for using Fixya!!!

as i previously posted, my picture was dim, muddy looking after replacing lamp with osram lamp. i fixed mine by taking the screen off and cleaning the small mirror. it had a thick layer of dust on it, cleaned with a microfiber cloth. no water, no glass cleaners. i also used a very fine new small paint brush and dusted the projector lens which also had a dust film. brightness, contrast and clarity returned!