Question about Dell Dimension 4600 PC Desktop

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I want to change the processor

How do i disassemble the air tunnel

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It is either on a pivert or spring loaded

Posted on Jun 04, 2008


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Posted on Jan 02, 2017


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Hello, welcome to Fixya!

Over heating maybe caused as a result of weak fan, ineffective heat sink, (dried thermal paste on the processor) or dust around the fan area in the system preventing free passage of air.
Also, where you keep your laptop when using it matters too. If you place your laptop on a foam, rug or too close to things preventing free passage of air may cause overheating.
You have to disassemble your laptop, and use a paint brush to remove every dust around the fan. Also, apply thermal paste on the processor to reduce the heat.
If you don't know how to disassemble your laptop, then you need someone to do that for you.

Take care.

Oct 24, 2015 | Computers & Internet


Infocus 4805 Light Tunnel DIY Replacement Option

About a year ago my light tunnel failed and I was able to fix it thanks to info on the net. Then about a month ago I decided to try to finally replace my Light Tunnel. Mainly because replacement parts are discontinued and manufacturer repair is way too expensive. In the process of failing, I was able to find a great low cost solution that's pretty easy to fabricate. My post is here:

If you have never opened your Projector go here:
It's regarding Dust Blobs, but it has pics to show how to disassemble the unit.

So as for the Tunnel and getting to is a thread for a different model PJ, but the layout is very similar:

Hope this post is helpful to you :)

on Jan 07, 2011 | InFocus ScreenPlay 4805 Multimedia...


Freezer is cool, but the refrigerator side is warm !

The fridge gets it cold air from the freezer. There is like an air tunnel that goes from the freezer (usually in the back) to your fridge to provide cold air.

What probably happened it the tunnel is blocked with ice or another liquid. The easiest thing to do is unplug the fridge for 24 hour so the ice can melt.
If that doesn't help, we will have to manually clear the debris in the tunnel.

on May 30, 2010 | Refrigerators

1 Answer

Microsoft teredo tunneling adapter

The teredo tunnelling adapter is necessary to translate/interpret network/internet requests in Windows, so you should leave it alone.

Jun 23, 2014 | Intel Acer Aspire 4745G-432G50 14.0" Intel


Rear projection TV displays a shadow on one corner or side of the screen.


This tip may be helpful only if your rear projection TV is displaying a darker shadow on one portion of the screen. If the shadow shape and size will not vary, that means that there is probably a detached mirror in the device called Light Tunnel, located inside your TV.

Most rear projection TV works projecting the light from the internal lamp on the screen. Before reaching the screen , the light will pass through a 'pipe' whose internal surface is covered in rectangular mirrors, located all over the tunnel surface.

A quite common fault is caused by one of the mirror detaching from the the light tunnel internal surface , and falling down or hanging in there. This will be seen on the display as a darker shade located near to one side of the screen.

The light tunnel is located in the light engine. To repair the problem the TV must be disassembled by a technician. Accessing and disassembling the light engine is not a repair that can be done by the owner.

Click here to view pictures of a light engine for a Samsung rear projection model. The tunnel is the optical device located in the light engine.

If you are a technician, to replace the light tunnel you will have to take apart the light engine, that apart of being quite a sensitive optical device, is also the most expensive part on a rear projection TV.

In that case you may find useful the service bulletin posted below, that is illustrating how to replace the light tunnel on a light engine for Samsung rear projection TV. Please be aware, that if you attempt doing this operation without sufficient knowledge and experience, you may damage your TV set beyond repair, as the light engine is very expensive.

How to replace light tunnel on a Samsung rear projection:SERVICE BULLETIN

The file is on PDF format.



on Feb 05, 2010 | Samsung HL-P5063W 50" Rear Projection HDTV

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My laptop shutdown suddenly, and I try to run the DELL Diagnostic there's an error "SMBIOS - Processor CPU Internal Temperature Critical. Service Tag # 37PHY1S How could I eliminate this problem

This is a sign that your laptop is overheating. If you touch the laptop while it is running & you find it too hot, make sure that the fan is running properly & that the air ways are not blocked.
You can blow compressed air into the cooling vents of the fan. If you notice clouds of dust coming out, then it might be a good idea to disassemble the laptop, clean the fan & air ways, & reassemble it back. If the fan has failed & is no longer running, it might need to be replaced.

When you disassemble the laptop, one thing worth doing is to check the thermal grease applied on the surface of the processor. Most probably it will have been dried up. In this case, clean it up carefully from both the processor's surface & the heat sink's lower surface, & re-apply fresh thermal grease. You can buy it online or at an electronics store.

Dec 11, 2010 | Dell 1525 PC Notebook

2 Answers

Heat related shut downs, dirty fan and heat sink? How to best clean?

Best is to get a compress air duster, you can disassemble your processor fan but be careful not to take it off. If you keep getting heat related shut downs try applying new thermal paste to your processor.

Mar 20, 2010 | Dell OptiPlex GX520 PC Desktop

1 Answer

It blows cold air, takes a long time to dry

the heating element broke and cant complete the circuit to heat up (they sell replacements) . you find a tunnel looking pipe and inside it you will see a spring coiled around inside the tunnel - pipe . change it.

Nov 19, 2009 | Maytag Dryers

1 Answer

New Problem after fixing Light Tunnel on a SP 4805

It sounds like you have mounted the replacement light tunnel incorrectly. It is a common error. What has happened is you have the light tunnel sitting on yop of the positioning stop which is opposite from the color wheel side. If you take it back apart you will see that it's not laying parallel to the casting. if you reposition it so it is just touching where the opening is in the clamp on the color wheel side you will feel it fall into place.

Jan 22, 2009 | InFocus ScreenPlay 4805 Multimedia...

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