The methods described in this article draw from the experiences of predecessors and the practical operations summarized by Lao Mo. This document is organized to serve as a reminder, as they say, “Previous events can serve as a teacher for future ones.” This article only represents Lao Mo’s personal views, serving as a record for future reference.
Relying on oneself— It’s unclear when we started living in cities, increasingly afraid to trouble others. Some say that to be remembered, one must frequently trouble others. However, the old saying goes, “Those who mix in society will eventually pay their debts,” especially when it comes to owed favors.
Urban Workers generally cannot do without computers. Over time, issues are bound to arise, and the most common problem is when the computer suddenly becomes unresponsive. You press the power button repeatedly, shake the chassis, but alas, the flowers fall with intention while the water flows without emotion.
After some effort, the chassis cover is opened, but the computer still shows no response; the power fan is silent, and the CPU fan is silent. In such cases, how does Lao Mo determine the fault? Friends with a desire to troubleshoot may want to read on.
Lao Mo’s Two-Step Approach:
First, determine if the power supply is working (whether there is a fault in the power supply);
Second, check if the power button on the chassis panel is functioning normally.
Step One:
1.
Unplug the 24-pin main power connector from the power supply connected to the motherboard, as shown in the picture below.
With the power connector clip facing up, short-circuit pins 3 (12V) and 4 (ground) as shown in the picture below.
Possible Fault One: If the fan does not spin, it is likely a power supply issue; generally, replacing it with a new power supply will solve the problem.
Possible Fault Two: If the fan spins, it generally indicates that the power supply is functioning correctly; continue troubleshooting (here, Lao Mo discusses the most probable scenarios, please do not get caught up in minor details).
Step Two:
1.
The extension cable for the chassis panel buttons is generally located at the lower right corner of the motherboard, as shown in the picture below.
2.
Unplug the PWR SW front panel power button connection line, and directly short-circuit it on the motherboard as shown in the picture below.
Possible Fault One: If the CPU fan does not spin, it is a motherboard issue; this could be a hardware fault (for a small cost, you can go to a local electronics market, generally only about 50 yuan – of course, if you want someone to come to your location, that fee is another matter; for a larger cost, directly replace it with a similar model motherboard from Taobao).
Possible Fault Two: If the CPU fan spins, it is highly likely that it will boot normally; if it still does not work, the reason might be that after all the fuss, the memory might be a bit loose; reseating it generally solves the issue.
What is memory? You can check the article below.
If the computer powers on but does not display, the host is running, but there is no display on the screen, and the host fan spins for a moment and then stops repeatedly.
