Dusty computer
During operation, any electrical circuits heat up its elements. This applies to the power supply and to the system unit. To ensure stable operation of the computer is passive (through the holes in the case) and forced (using fans) for heat dissipation. The user's guide always specify the permissible limits of temperatures at which a particular node of the system unit is working fine.
If the power supply got a lot of dust, the heat sink is significantly reduced, which leads to overheating of the device. Disconnect the computer from network and remove the screws that the power supply is attached to the back of the system unit. Remove the cover from the PSU by unscrewing the 4 screws. Carefully blow out the unit from dust with a vacuum cleaner, included in the blow-out, hair dryer or can of compressed gas. Stiff brush will clean all the Board elements.
Usually the power supply is attached to the top panel of the system unit. If the holes of the system unit clogged with dust, hot air, finding no outlet, rises and additionally heats up the PSU. Blowing the power supply, do not forget to get dust and the system unit.
Quality expensive power supplies are equipped with protection system that shuts off the PSU overheating. If your computer frequently disconnects may cause problems with the food.
Fan malfunction
The power supply may overheat due to lack of forced heat sink. If fan BP much buzz or taps during operation, disassemble the power supply as described above. Unscrew the 4 screws that the cooler is fastened to the wall of the PSU, and remove it from the housing. Remove the sticker and remove the rubber plug in the center. Apply a couple of drops of bearing oil and spin the fan blades in different directions so that the oil gets evenly distributed.
Put back the rubber plug and remove with a cotton swab excess oil from the surface. Apply the adhesive sticker and attach it on the cap. Screw the fan to the power supply enclosure and verify that it works.
The failure of elements of the power supply
Disassemble the power supply and carefully inspect the Board on the subject of swollen or exploded electrolytic capacitors – a healthy top end should be flat or slightly depressed. Please note, there are no on-Board blackened burnt plots and elements. All these malfunctions can lead to overheating the PSU.
Defective items can be replaced at home. But, if you are not confident in their own abilities, better to buy a new power supply, so as not to risk costly nodes of the system unit.
Design features
Some manufacturers to reduce the cost of their products produced is too small in size of BP. Due to lack of free space elements inside the housing are heated much stronger. So experts recommend not to skimp when buying a power supply. Better to take the product of well-established firms.
The laptop power supply
The removal of hot air from the laptop casing is carried out through vents on its underside. To prevent overheating of the power supply, the laptop cannot be put on a pillow, sofa and other surfaces, hold the heat well. It is best to use special supports which do not interfere with heat dissipation and do not give the laptop overly warm.