


What does it mean when the computer motherboard test card shows D4?
The motherboard test card displays D4, which means the memory test failed.
Memory testing refers to the multiple inspections that the memory undergoes during the production process. These inspections include: welding inspection, PCB appearance inspection, functional inspection and overall appearance inspection, etc.
On the other hand, it also refers to software memory testing. It also needs to test the occupancy rate of the software's maximum memory and other resources to prevent the software from using resources beyond the system limits. At the same time, it is also necessary to test the software behavior of system resources under extreme circumstances, such as when the system memory resources are consumed by other applications and the program runs for a long time.
The motherboard diagnostic card displays D4 error, what does it mean?
The motherboard diagnostic card displays D4, which means: the memory test failed.
Solution: Use an eraser to rub the contact points of the CPU. There may be aging areas. If the motherboard is not deformed, you can try changing the CPU. If it still doesn't work, it is recommended to replace the memory.
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