Industrial computer common faults and solutions

Industrial computer common faults and solutions First, turn on the computer power and the computer does not respond:

1. Check if the power outlet has power and is properly connected to the computer;

2. Check if the computer power supply works normally (whether the power supply fan is turned after the power is turned on), and whether the display is properly connected to the host;

3. Open the cover to check whether the power supply is properly connected to the computer backplane or motherboard. Is the connection between the backplane and the motherboard loose? Is the power on the backplane or the motherboard powered on, and the ATX power supply is incorrectly connected;

4. Unplug the memory stick to turn on the alarm;

5. Replace the CPU or motherboard.

2. After the power is turned on, the power indicator on the backplane will be off when it is on. It cannot be powered. First, see if there are any foreign objects such as screws in the chassis, resulting in a short circuit. Next, check if the power cord is reversed, resulting in a short circuit to ground. Use the replacement method again to replace the power supply, motherboard, and backplane.

3. After the industrial computer is powered on, the power supply works normally. Does the motherboard have no reflection? First remove the peripheral card and the connected device to see if it can be started. If not, remove the memory to see if it is alarmed. Then check the CPU. Is it normal? Finally replace the motherboard and check if the motherboard is normal.

Fourth, after the boot, I heard the self-test sound of the motherboard but there is no display on the display:

1. Check if the display is properly connected to the host;

2. Insert another display card to check whether it can be displayed normally;

3. Clear CMOS (may be set with errors) or replace the BIOS;

4. Replace the CPU board (board integrated graphics) or monitor.

5. There is no display on the alarm display after power on:

1. Open the cover to check whether the memory module is installed or loose.

2. Unplug the memory stick and turn on the alarm sound after the power is turned on;

3. Clear COMS (may be set with errors) or replace the BIOS;

4. Replace the display card or insert a display card (board integrated graphics).

5, the general long sound is the fault of the memory stick; continuous short sound is divided into two types: one is the video card alarm and the other is the BIOS alarm; can enter the system but has a short interval, there is a CPU temperature alarm under the motherboard BIOS Set, when the CPU temperature reaches the setting, the motherboard will send a short tone alarm with an interval.

6. The sound analysis of the power-on alarm and alarm is as follows:

Award BIOS

1 short --- system starts normally

2 short --- regular error

1 long 1 short --- RAM or motherboard error

1 long 2 short --- display or graphics card error

1 long 3 short --- keyboard controller error

1 long 9 short --- motherboard flash RAM or EPROM error, that is, BIOS damage

Uninterrupted long sound --- memory is not plugged in or memory is damaged

Repeat short sound --- power supply damage

AMI BIOS

1 short --- memory refresh failed

2 short --- memory ECC check error

3 short --- system basic memory, that is, the first 64KB, check failed

4 short --- system clock error

5 short --- CPU error

6 short --- keyboard controller error

7 short --- system real mode error, can not switch to protection mode

8 short --- display memory error

9 short --- ROM BIOS check error

1 long 3 short --- memory check error

1 long 8 short --- display or graphics card error

Phoenix BIOS1 short: system startup is normal

1 short 1 short 1 short: system plus point self-test initialization failed

1 short 1 short 2 short: motherboard error

1 short 1 short 3 short: CMOS or battery error

1 short 1 short 4 short: ROM BIOS failed

1 short 2 short 1 short: system clock error

1 short 2 short 2 short: DMA initialization failed

1 short 2 short 3 short: DMA page register error

1 short 3 short 1 short: RAM refresh error

1 short 3 short 2 short: basic memory error

1 short 4 short 1 short: basic memory address line error

1 short 4 short 2 short: basic memory check error

1 short 4 short 3 short: EISA timing error

1 short 4 short 4 short: EASA NMI port error

2 short 1 short 2 short to 2 short 4 short 4 short (that is, a combination of all sounds starting with 2 short): basic memory error

3 short 1 short 1 short: error from DMA register

3 short 1 short 2 short: main DMA register error

3 short 1 short 3 short: main interrupt processing register error

3 short 1 short 4 short: error from interrupt handling register

3 short 2 short 4 short: keyboard controller error

3 short 3 short 4 short: display card memory error

3 short 4 short 2 short: display error

3 short 4 short 3 short: no read-only memory is found

4 short 2 short 1 short: clock error

4 short 2 short 2 short: shutdown error

4 short 2 short 3 short: A20 door error

4 short 2 short 4 short: protection mode interrupt error

4 short 3 short 1 short: memory error

4 short 3 short 3 short: clock 2 error

4 short 3 short 4 short: real clock error

4 short 4 short 1 short: serial port error

4 short 4 short 2 short: parallel port error

4 short 4 short 3 short: digital coprocessor error

Compatible with BIOS:

1 short: the system is normal

2 short: system power-on self-test (POST) failed

1 long: power supply error, if there is no display, it is a display card error

1 long 1 short: motherboard error

1 long 2 short: graphics card error

1 short 1 short 1 short: power supply error

3 long 1 short: keyboard error

Sixth, the motherboard can not self-test after booting:

1. Press the “Del” button to reset the CMOS or clear the CMOS.

2. Replace the memory module;

3. Re-flash the BIOS or replace the same BIOS chip.

7. After the boot, the motherboard can work normally. The BIOS detects the keyboard part and reports the keyboard error. First, see if the keyboard lock is locked and the keyboard lock is released. If not, check the connection between the motherboard and the backplane and whether the keyboard and mouse are connected correctly.

Eight, after the boot, the other parts work normally, the floppy drive read light is always bright floppy drive can not be used? Should be the floppy drive data line reversed

Nine, the industrial computer installed hard disk can be started before, after installing the hard disk, found that it can not start? Please first check whether the hard disk data cable is reversed

Ten, mouse, keyboard can not be used? Check whether there is a keyboard and mouse one-to-two adapter, if there is a keyboard, mouse reverse connection.

XI. After booting, the motherboard self-test is successful but cannot boot the system from the hard disk:

1. Press the “Del” button to enter the CMOS hard disk parameter setting and boot sequence is correct;

2. After booting with the optical drive or floppy drive, check whether the hard disk has a booting system or whether the hard disk is properly partitioned and the boot partition has been activated.

3. Use the FDISK/MBR command.

12. After the boot, the memory self-test does not match the actual capacity:

1. Check whether the motherboard memory (board integrated graphics) is shared with the motherboard memory, so that part of the memory will be divided into memory;

2, check whether the memory is small particle memory (that is, the capacity of each chip in the memory is less than 16M, such as 128M memory because there are 8 chips), because some old chips do not support large particle memory, only half of the capacity is displayed after plugging in;

3. A very small number of motherboards use a special CPU, occupying part of the memory as an instruction decoder for CPU instruction set conversion, thus causing memory capacity discrepancies.

Thirteen, after booting, you can't completely enter the system and crash or blue screen:

1. Check if there are conflicts in system resources.

2. Is there any error in the BIOS settings?

3. Replace the memory module;

4. Re-partition the hard disk to format the operating system.

Fourteen, the industrial computer in the company test is normal, to the customer when the boot just entered the system is not displayed, the display signal lights continue to flash?

Generally, the resolution or refresh rate is set too high, causing the customer's display to not be displayed. Enter the safe mode and set it as new.

Fifteen, PS/2 mouse can not be found after entering the system:

1. Check if a one-to-two adapter is used and connect normally. Sometimes you need to exchange the plug with the keyboard and mouse.

2. Press the “Del” button to enter the CMOS to see if the PS/2 option is turned on.

3. Check whether the IRQ used by the PS/2 mouse is occupied (the IRQ assigned by the BIOS to the PS/2 mouse is 12);

4. Has the mouse driver been loaded (mainly the NT operating system, if the mouse driver is not loaded when the system is installed, the mouse cannot be driven later);

5. Replace another mouse.

Sixteen, the windows system crashes or blue screen during the running process:

1. Whether a new device is installed causes system resource conflicts;

2. Is the wrong or expired driver installed?

3. Check if the system is infected with a virus.

4. Whether the cpu fan is still rotating normally;

5. System files or applications and disks are damaged;

6. Check if there is a memory incompatibility or a memory problem.

17. The device driver cannot be installed correctly:

1. Check if the driver is up to date and supports the operating system;

2. Whether the driver needs the support of the operating system patch;

3. Whether the resources occupied by other devices conflict with the resources occupied by the devices that need to be driven;

4. If it is a peripheral device, change one slot and reinstall the driver;

5. Replace the device and reinstall the driver.

Eighteen, ATX power can not achieve a complete shutdown:

1. Whether to open the ACPI option under the BIOS;

2. Whether to open the ACPI option when the system is installed or whether the system supports advanced power management;

3. Some motherboards must be connected to the GND pin (such as PEAK-639VL2) when connecting the ATX cable.

Nineteen, the industrial computer startup time is very long (ESP WIN98):

1. Turn off the self-starting item of the system startup file;

2, run SCANDISK to check the disk - whether there are bad sectors;

3, run the disk defragmentation program - eliminate debris;

4, run the disk cleanup program - eliminate junk files;

5, may be related to the installation of the network card: to adjust the network settings;

6, may be infected with the virus: kill.

20. Due to the improper installation of the software, *.vxd is lost, which seriously causes the system to fail to enter:

1. Log in and write down the missing files and paths;

2, boot the computer with the WIN98 boot disk;

3. Type EXT, press Enter at the prompt: PLEASE ENTER THE PATH TO THE WINDOWS CABFILE and enter the full path of the WON98 compression package, press Enter;

4, the next steps according to the computer prompts to enter the file name.

Twenty-one, local printers can not print online:

1. Check whether the network cable and network configuration are correct and can be connected to the network.

2. Check if the printer in the computer print settings matches the shared printer.

3. Check if the printer is working properly.

USB hard disk, U disk can be used as a boot disk? This depends on whether the motherboard BIOS support, such as W130, STX88601, etc., and the previous motherboard generally does not support.