Some customers suddenly couldn’t turn on the computer after buying an industrial tablet and using it for a period of time. The company was anxious about the operation of the machine and didn’t understand the construction principle of the industrial tablet. Naturally, they didn’t know the specific reason and how to go. operating.
What is the reason why the general industrial tablet computer cannot boot normally? Our technical summary has 10 faults.
The following editor will teach you how to troubleshoot industrial tablet PCs that cannot be turned on, black screens, blue screens, etc. If you encounter the following ten common failure phenomena, analysis and solutions to do a simple analysis, I hope to help users who encounter such problems.
1. Trouble phenomenon: press the power button, no response
Analyze the problem: If you press the power button, the indicator light of the industrial tablet computer does not light up, we must make sure whether the power cord is loose, or whether the power adapter has been short-circuited and burned out, and whether the supply voltage is normal
Solution: check the circuit and make sure the power is normal.
2. Failure phenomenon: There is no response after pressing the power button, and there is no display on the screen after the industrial tablet computer is turned on.
Analyze the problem: the internal data of the motherboard COMS chip is damaged by viruses or static electricity and cannot be read. The system cannot be started because the self-check cannot be completed.
Solution: Contact the motherboard manufacturer to replace the new COMS chip or find the BIOS file provided by the motherboard manufacturer and use the burner to write it.
3. Trouble phenomenon: After pressing the power button, the optical drive light flashes, the mainboard power prompt light is on, the power supply is normal, but there is no display on the screen.
Analyze the problem: This phenomenon occurs after the CPU is damaged. The BIOS first checks the CPU during the self-check process. The CPU is damaged and cannot pass the self-check, and the computer cannot be started.
Solution: Check whether the CPU is installed correctly, check whether the CPU core is damaged, use the replacement method to check whether the CPU is damaged, if the CPU is damaged, replace the CPU.
4. Trouble phenomenon: After pressing the power button, the industrial panel computer will automatically shut down immediately or there will be no response.
Analyze the problem: The problem is clear whether this industrial panel computer uses a motherboard with a fan. In order to protect the CPU from the heat dissipation device, some motherboard manufacturers may cause the CPU to burn out without installing a CPU fan or not connecting to the motherboard. When you connect the CPU fan power cable or connect the CPU fan to SFAN (system fan interface), it will not boot.
Solution: Correctly connect the CPU fan to the power interface of the motherboard, and confirm that it is connected to the three-core dedicated CPU fan interface next to the CPU.
5. Failure phenomenon: There is no display or prompt when booting, the mainboard power is normal, and the CPU is normal, but there is no display on the screen.
Analyze the problem: After the computer has been used for more than 3 years, the battery voltage for the BIOS settings gradually decreases, and data cannot be saved. Some motherboards using early chipsets may fail to complete the self-test phenomenon, and the motherboard itself has no hardware problems.
Solution: Buy CR2032 lithium battery, replace the existing battery on the motherboard to complete the self-test normally, and then reset the BIOS parameters.
6. Trouble phenomenon: The self-check is not completed after the machine is turned on, and there is no "di" sound, and a continuous "di-di-di" sound is emitted.
Analyze the problem: According to the description of the BIOS alarm sound provided by the BIOS manufacturer (Note: There is no boot sound on the motherboard used by this manufacturer. However, many motherboard manufacturers have motherboard buzzer alarms), the problem is generally caused by the memory , The chance of memory damage is relatively small, most of the problems are caused by memory oxidation or poor contact of the socket.
Solution: First check whether the golden fingers, memory slots, chips and PCB are burnt out. If there are any, it is recommended to replace the memory. If not, use an eraser to gently rub the golden finger, and then reinsert the memory slot.
7. Trouble phenomenon: After turning on the power, the power supply is normal, but the NUM indicator on the keyboard does not flash. Unable to complete the self-test.
Analyze the problem: the keyboard controller or I/O chip of the motherboard is damaged and the self-check cannot be completed.
Solution: Replace the I/O chip by the manufacturer and check the keyboard interface circuit.
8. Trouble phenomenon: There is no response when the power button is pressed, and the power and hard disk indicators are not on.
Analyze the problem: by using a multimeter to check the output voltage of the power supply, it is found that 12V, 5V, and 3.3V are all abnormal, which is very different from the standard voltage, and there is a problem with the internal circuit of the power supply.
Solution: After replacing the high-quality 300W power supply, the problem is solved.
9. Trouble phenomenon: After pressing the power button, the industrial tablet computer fails to pass the self-test, the display does not display, and the display indicator is orange or flashing.
Analyze the problem: During the self-test, the graphics card failed the self-test, failed to complete the basic hardware test, and failed to start.
Solution: Check whether the gold finger of the graphics card is oxidized or there is a large amount of dust in the AGP interface that causes a short circuit, rub the gold finger with an eraser, and clean the dust in the AGP interface with a leather tiger. At the same time, use the replacement method to eliminate the problem of damage to the graphics card. If the graphics card is damaged, replace the graphics card.
10. Trouble phenomenon: Remove the parts in the industrial panel computer case and test it normally. When installed in the case, it cannot be turned on. Sometimes the case can be turned on normally when the case is erected, but it cannot be turned on after being laid flat.
Analyze the problem: some cases are not made standardly, causing some motherboards to be deformed after installation or some boards are deformed. The bottom of the motherboard is in contact with the case, causing a short circuit and making it impossible to boot.
Solution: Replace the chassis with good quality and use standard accessories to install the components.
