Cleaning the adhesive off the motherboard was extremely difficult. But since Xing Baohua had come up with the solution himself, after cleaning the adhesive, he started measuring. The CPU was fine; it was just that the voltage protection on the motherboard had burned out.
This indicates a design flaw in the power manager; it's not properly controlling the current.
After replacing the component, add another resistor to control the current.
When I plugged in the CPU to prepare for testing, Zhang Dongshuo stopped me and said, "Hang the anti-static wire on your wrist."
Xing Baohua nodded, almost forgetting that he had already removed the gelatin. It wasn't that he was afraid of short circuits on the motherboard, but rather that he was worried about static electricity.
Static electricity is like a small lightning bolt in the world of low-voltage circuits, and it can cause significant damage to electronic components. You can't feel it when you touch low-voltage circuits, but everyone has experienced static electricity; a single hit can be quite painful.
The lights were turned on again, and Xing Baohua used a multimeter to test the current. The main components were found to be fine, but the screen was still waiting to boot into the system. To be honest, this system was a bit slow!
*Snap*, the power went out again, this time with a slightly burnt smell.
Is this never going to end? You can see the burnt components with the naked eye; this time it's the transistor IC that burned out. Xing Baohua integrated the transistor ICs together for convenience and to save space.
What went wrong? Logically speaking, Xing Baohua should have been very confident in the motherboard he made; all the parameters were custom-designed. But this time, something strange happened—only the transistors burned out.
That must be a problem with current and voltage.
However, no problem was found during the measurement. The voltage and current were within safe limits. In just over ten seconds, the IC was burned out by a powerful current.
From overheating to burning out, it was also caused by the impact of a large current.
Okay, let's find the cause step by step.
It's actually quite simple: any problem with an electronic component can be tested using the process of elimination.
Start by checking from the largest components to the smallest. Without the CPU, check the power supply and the current it carries. Then observe the components that are prone to overheating. Since there is no thermal sensor, a temperature meter has to be used for testing.
Fortunately, the temperature readings were normal. After about an hour, the motherboard was fine. Previously, when the CPU was plugged in, the motherboard would burn out in just a few seconds. Now, even after an hour without the CPU plugged in, there were no signs of it burning out, which means the motherboard is indeed fine.
If there's a problem with the CPU, these things undergo rigorous testing before leaving the factory. Although there's a one in a thousand chance of failure, the probability of it happening to Xing Baohua is absolutely impossible.
Regarding quality, Xing Baohua was absolutely certain that the CPU was without fault.
Then plug it back in and test it.
It's still burning.
After replacing the motherboard's electronic components, Xing Baohua set these four chips aside. Since there were so many chips, he didn't believe they all had problems.
No operating system installed, so it's fine. The CPU got hot, so I added a heatsink and tested it with a thermometer; it's over 30 degrees Celsius, which is normal.
Xing Baohua looked at Xiao Tianna and said, "Go to the system."
Even after installing the system, the motherboard still had more than a dozen sides burning out.
The initial assessment was that the system caused the motherboard to burn out. This was the first time Xing Baohua had encountered such a problem. If the system has a problem, it won't turn on unless there is an aggressive virus that specifically targets certain electronic components to damage the motherboard. Such viruses cause the transistor IC to suddenly increase the current or voltage, causing the transistor to burn out.
The pressure is now on Xiao Tian's side.
This guy really wanted to say that the system was fine, but tests don't lie. He made an apologetic face, quickly grabbed the disk, went to his computer, and started disassembling the system to look for bugs.
Xing Baohua and Zhang Dongshuo stood behind Xiao Tian, watching him find the bugs.
Even in this cool, deep cave of the underworld, this guy was sweating profusely, which showed how much pressure he was under.
Finding bugs is the most troublesome problem for programmers. They search for them over and over again, and everything looks correct. It's like looking for a typo in a million words. Everything looks right to them.
The system was enormous; it would take forever for Xiaotian to find it on his own. After backing up the data, seven or eight people began searching by allocating areas.
After looking at it for a while, Zhang Dongshuo stopped. It wasn't that he didn't understand it, but rather that he was also thinking about which part of the process was malfunctioning. He worked in hardware, and now that there was a problem with the hardware, he was also actively trying to figure out the issue.
He hadn't been involved in the development of the motherboard, but now he walked over there, picked it up to examine it, and occasionally compared it with the blueprints designed by Xing Baohua.
Overall, Xing Baohua is technically quite skilled, and there are no major issues with his design.
But as he looked at it, he noticed something amiss.
"Boss, come here for a second." Zhang Dongshuo called out to Xing Baohua, who was holding down Xiao Tianna.
Xiao Tian heard the sound and turned his head, only to be slapped by Xing Baohua: "Get back to work, look at what you do every day."
After saying that, Xing Baohua walked over to Zhang Dongshuo, saw him holding the blueprints, and asked, "Where do you see the problem?"
“Yes, there is, but I’m not sure yet. Look, you designed four chips, and the main control is integrated into one IC. So, after powering on, will all four work together or will each chip work individually?” Zhang Dongshuo asked.
"One!" Xing Baohua immediately understood. He asked Xiao Tian to bring over the system disk. The child had no choice but to reinstall the disassembled system and plug it into the motherboard.
Xing Baohua first inserted one chip. After it powered on, the computer booted up and entered the system. After waiting for about half an hour, he inserted the second chip. He could clearly feel the power supply fan speed increasing. The two chips did not cause the motherboard to burn out. He took a thermometer to test the temperature, and the motherboard power IC started to heat up to over 40 degrees Celsius, but it did not rise any higher.
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