Original link: https://zhou.ge/2023-07-06.html
build:
Fault performance: black screen, but all its functions such as radio, DVD, U disk, touch and other buttons can be used normally. I usually ignore it if I don’t open it very much. Recently, I have a little spare time. I am thinking about whether I can dismantle it myself. Open repair.
The first task is how to remove the car engine smoothly. I searched for a few less detailed dismantling videos and watched it several times. Basically, the buckle is fixed without screws. If you master the key points and use proper force, you can easily remove the panel and pull out the car. Machine, take pictures of the tail line first before unplugging it just in case.
First use the elimination method to disassemble the car and machine, and use an eraser to remove all the golden fingers of the cables to eliminate the poor contact, and then install them one by one and test them on the machine. Still only the sound and the display screen do not respond. Poor contact ruled out that only the display screen or power supply module remained. I took a picture of a screen of the same model on the Internet. After the goods arrived, I was full of anticipation and put it on the test machine. The screen was still pitch black…
In the process of repeated disassembly, new problems were encountered. The original normal touch screen was touched randomly, and the volume adjustment button could not be used normally. It shows that the problem is not fully understood, and two more pits have been dug 
.
In the car at night, I accidentally discovered that the screen can see hazy images when the screen is illuminated by the strong light of a flashlight in a dark environment? Obviously the backlight is insufficient, but the same is true for the new screen in the early stage, so there is a high probability that it is a power supply problem. After returning the new screen, I will lose the round-trip shipping fee. After all, the store’s screen is fine. It proves that my screen is also good, but the power supply module is faulty, and there is no problem with the circuit board screen display. Let it go and listen to music as a CD.
Obsessive-compulsive disorder, the two holes I dug by myself have to be filled in by myself, and the problem of touch disorder is temporarily solved by dismantling the touch screen cable. The volume cannot be adjusted. The default decibel is quite high, but fortunately there is a physical mute button. After using it for two or three days, I started tossing again when I was free. The problem of rotating the volume adjustment is generally just a small accessory.
I regretted not buying a soldering iron and came back to replace it myself. I took the accessories to the appliance repair and asked the boss to replace them. Seeing that the boss’s skills and proficiency were comparable to mine, it took more than half an hour to barely install it. At the time of payment, I also made an oolong. At first, I misheard the quotation and ended up paying a single-digit labor fee, which was enough for me to buy a set of soldering iron tools.
After finishing the work, I went back to the computer to test immediately, but the volume was still fixed at the default high decibel level and could not be adjusted. 
. There is a high probability that the accessories are also broken and cost a few dollars. I am too lazy to find a business theory, so I resolutely abandon the pit and refuse to repair it. I want to replace the car machine!
Change:
Xianyu bought a general-purpose car with the same size. The wiring logo on the rear is almost the same as the original car. The reversing image that I haven’t seen for a long time also comes out. Although I hardly look at it and only look at the two rearview mirrors, but my wife is a novice and loves to look at this thing. 
..
No wonder the current car repair shops are all repairing by replacement, only those who have repaired know the pain and joy in it; the labor cost of repairing this one and breaking it is enough to buy a new one. But the process of tossing can still accumulate some experience..
This article is transferred from: https://zhou.ge/2023-07-06.html
This site is only for collection, and the copyright belongs to the original author.