I have encountered many strange things during this period of time. For example: after entering the operating system, the inexplicable "black screen" is inexplicably; the quality of the TV picture viewed through the TV card is very poor and the interference is serious; when using the love phone during peak power consumption, it is obviously a bit "slow"; the line width of the monitor becomes larger when it is turned on, etc.
These inexplicable failures have troubled the author for several months. During this period, the author has reinstalled the operating system, removed dust and replaced various accessories, and checked the resource status, without any problems.
Until one day, I accidentally heard a very slight ignition sound in the power socket, so I took the power box apart and carefully checked the conditions of each contact and wire, but nothing was found. So, where did the ignition sound make? After analysis, the author puts the doubts on the fuse that plays a "short-circuit protection role", opens the insurance compartment, and takes out the fuse. It was found that the copper wire inside it had turned black, but it did not melt.
After replacing a fuse, all kinds of inexplicable faults no longer occur. At this time, the author was really mixed with emotion. As a veteran DIYer, he was tortured by a security guard for so long.
Cause analysis: Due to the poor quality of the fuse, a "quality" change occurred after long-term use. In this way, the fuse indirectly acts as a resistor with a large resistance value, and this resistance value is very unstable, so the voltage provided by the power socket will be unstable, thereby generating a powerful interference signal to affect the operation of the TV card and causing its picture to be disturbed.
In addition, the unstable voltage also affects the chassis power supply synchronously, resulting in various inexplicable situations. For the display, the unstable voltage affects the initialization of the I2C control circuit inside it, so the display line amplitude becomes larger.
Finally, I would like to remind everyone that when there is a problem with the computer, don’t just look for the reasons in the computer itself, external factors should not be ignored.
These inexplicable failures have troubled the author for several months. During this period, the author has reinstalled the operating system, removed dust and replaced various accessories, and checked the resource status, without any problems.
Until one day, I accidentally heard a very slight ignition sound in the power socket, so I took the power box apart and carefully checked the conditions of each contact and wire, but nothing was found. So, where did the ignition sound make? After analysis, the author puts the doubts on the fuse that plays a "short-circuit protection role", opens the insurance compartment, and takes out the fuse. It was found that the copper wire inside it had turned black, but it did not melt.
After replacing a fuse, all kinds of inexplicable faults no longer occur. At this time, the author was really mixed with emotion. As a veteran DIYer, he was tortured by a security guard for so long.
Cause analysis: Due to the poor quality of the fuse, a "quality" change occurred after long-term use. In this way, the fuse indirectly acts as a resistor with a large resistance value, and this resistance value is very unstable, so the voltage provided by the power socket will be unstable, thereby generating a powerful interference signal to affect the operation of the TV card and causing its picture to be disturbed.
In addition, the unstable voltage also affects the chassis power supply synchronously, resulting in various inexplicable situations. For the display, the unstable voltage affects the initialization of the I2C control circuit inside it, so the display line amplitude becomes larger.
Finally, I would like to remind everyone that when there is a problem with the computer, don’t just look for the reasons in the computer itself, external factors should not be ignored.