I hear noise coming from the back vents and I think it might be the processor fan. Is there a way to fix/clean it so that noise goes away and do I have to open it from the bottom? This is for Qosmio G25.

The whining if it sounds like a mosquito type whine! it can be a capacitor, i have same issue, you can usually hear when u are on standby but if your hearing like a "wheel of fortune"! and slowing down would likely indicate it's a fan which is possibly covered in dust and the whining is the fan stopped trying to power forward or it slowly moving and slowing down. If you think it's the fan you should unplug your TV to avoid the fan burning out then have someone who knows what their doing take a look at than fan for you and clean the dust away from it, you may be able to get some access through vents in the side and can try your vacuum cleaner in those vents while TV is unplugged but i'd not go messing inside a TV without wearing some rubber gloves!
Looks like the engineer would need to remove TV casing, check fan to see if it is blocked with dust or not, or if just failing for other reason then either clean or replace. If you don't get it done and the fan fails to cool the TV your risking other vital components overheating and breaking for good so best get it looked at, sounds like the fan to me...

YOUR ARE GETTING ICE AROUND YOUR FREEZER FAN BLADE THAT IS THE NOISE YOU ARE HEARING IT COMES FOR THE ICE MAKER FILL TUBE THAT COMES IN FROM THE BACK WALL OF FREEZER TO THE ICE MAKE YOU CAN'T DO ANYTHING TO FIX IT JUST MAKE SURE YOU HAVE NO ICE BIULD UP IN THAT TUBE IT MAKES IT LEAK DOWN ON YOUR FAN

Your processor doesn't make noise. The noise you are hearing is most likely the fan. If it is the fan, the noise is because the processor is overheating which may be caused by the collection of dust or the computer sitting on a soft surface such as a couch or a bed and blocking the vent. Some computers just have very loud fans.

I believe this code is ignition failure.
Turn power off and after 20 seconds turn power on with thermostat calling for heat. Vent blower should come on first. After a bit igniter should lite up. You should hear click noise of gas valve open up. If igniter does lite and you hear click noise, flame should come on for a few seconds minimum. If igniter doesn't lite and you hear click noise from gas valve, igniter is bad. If flame lites and then goes out, flame sensor probably needs cleaned. Both igniter and flame sensor are in metal plate under burners. Igniter has 2 wire going to it and flame sensor has one wire. If you think it is flame sensor you can remove with taking it out with 1 1/4" hex screw. Flame sensor will have white film on it if it needs cleaned, clean with steel wool or a dollar bill. If it isn't weither of these it is gas valve or circuit board.

Sounds like filter is clogged or dirty. Take a vac cleaner to the vents. If that doesn't cure it, then disassemble and clean thoroughly.

try to fix back processor fan and heat sink,and also clean your ram and fix back.

Check your processor fan it might have dust on it. your pc seems to be heating up. clean processor fan properly. all noise should go away and the perfromance will come back to normal

I would check the CPU fan, if you can "clean" is with high pressure air that may be your problem, also the power supply fan do the same with

The problem is a buildup of ice on the plastic housing (the curved plastic bit) in the back of the freezer under the fixed shelf where the icetub goes. The fan behind this plastic housing is hitting the ice when the defrost comes on.

Unplug the fridge, unpack the freezer, remove the four screws in the back, take off the sheetmetal backing and let the fridge thaw. You can remove the plastic piece after a while and get the ice off (be careful not to remove the styrofoam insulation by going too quickly).

Reassemble and you're back in business, for a few months. I'm never buying Samsung again myself.

The color wheel is the most common problem when it comes to noise from DLP's. To determine if it is a color wheel or fan: Turn on the set. When the noise starts, turn off the set. If the noise goes away within 5 seconds, then the color wheel is bad. If the noise goes away after one to one and a half minutes after the set was shut off, then one of the fans are making the noise.