The trouble with the power sockets _ Hardware Maintenance

I love the machine this period of time encountered a lot of strange things. For example: into the operating system, inexplicably "black screen", the television card to watch the quality of the TV screen is very poor, interference phenomenon is serious, in the peak time use of love machine, obviously feel some "slow";

These puzzling faults have plagued the writer for several months. During this period, the author has reinstalled the operating system, dust and replaced a variety of accessories, check the resource situation, there is no problem.

Until one day, the author inadvertently heard the power outlet has a very slight spark sound, so the power box to take apart, carefully check the contacts and wires, the results of no discovery. So, where exactly is the sound of the spark? After analysis, the author put the doubt on the "short-circuit protection role" of the insurance pipe, open the vault, take out the insurance pipe. Found inside the copper wire has become black, but did not break.

After replacing one of the tubes, a variety of inexplicable failures are no longer present. At this time, the author is really mixed feelings, as a veteran of the DIYer, unexpectedly was an insurance tube tortured for so long.

Reason analysis: Because the quality of the insurance tube is poor, after a long period of use produced a "quality" change. In this way, the tube indirectly acts as a resistor with a larger resistance value, and the resistance value is very unstable, so the voltage provided by the power outlet will be unstable, resulting in a powerful interference signal affect the work of the TV card, so that its screen interference.

In addition, the unstable voltage also affects the chassis power supply, resulting in a variety of inexplicable circumstances occur. For the display, the unstable voltage affects the initialization of the internal I2C control circuit, so the display amplitude becomes larger.

Finally remind everyone, when the computer problems, do not blindly in the computer itself to find reasons, external factors can not be ignored.