Computer can not open the processing method summary _ Hardware Maintenance

The office computer has been running continuously, because the office computer has been used for several years, almost all the office computer screen is from the "black screen-blurred writing-clear" process of this gradient. At this time, there is a computer very strange, boot, 30 seconds, the host led off;
The rainy days, after the winter vacation back to the office, the computer has been one months did not open.
The office computer has been running continuously, because the office computer has been used for several years, almost all the office computer screen is from the "black screen-blurred writing-clear" process of this gradient.
At this time, there is a computer very strange, boot, 30 seconds, the host led off;
Previously encountered such a situation, the reasons are more: power outlet contact Bad, host power damage, CPU fan or motherboard damage and so on.
So, I start from the following aspects of repair:
First, check that the power outlet is normal. Replace an available power outlet, the failure is still!
Then, look at the power to the computer. The fan on the back of the chassis is turned when it is just opened, indicating that the power supply is not faulty!
Again, check the CPU fan. It can also rotate when it is powered on.
Finally, check the motherboard for a capacitor that has no damage or distortion.
Strange, whether the dampness caused by bad contact?
I blew it for nearly half an hour with the wind, and the trouble remained.
I thought over and over, thinking about all sorts of possible failures, but couldn't explain the phenomenon: the computer was normal when it was first opened, and then suddenly there was no electricity.
I have reviewed a number of newspapers and magazines that introduce computer malfunctions, and consulted many professionals who agree that a certain capacitor or chip in a computer motherboard is problematic, but I have not found a specific fault for the time being. Is it really the motherboard failure? But I always think that the main reason is not here, and I can not rule out, also can not find awaits.
After a few days, the continuous inspection, careful observation found: the motherboard power pins connected to the chassis will cause this failure?
I carried out the test with a skeptical attitude: first check the Reset key is whether normal use, in the case of the reset key to ensure normal, the reset connected power cord unplug, connected to the electricity line interface.
Boot, the computer can be normal boot!
Originally all this is the chassis power cord damage reason!
So, I put the reset key instead of power key to boot, the computer can be used normally. Although, there is no reset function, but at least can ensure the normal operation of the computer.
Later, buy back a chassis connected to the motherboard power pins on the cable, the computer is normal, no more than the fault.
Summary: In the past I always thought that the machine is a power supply or other important parts of the fault, never considered that there may be a small power cord. For our generally inexperienced office staff, sometimes difficult to consider, so, if your computer has more than the fault appears, do not try.