Troubleshooting method for computer industrial computer boot without display failure. (no alarm sound)
Step 1: First check whether the external wiring of the computer is connected well, and re-plug each connection to see if the fault is eliminated.
Step 2: If the fault persists, then open the main case to check whether there are any excess metal objects in the case, or a short circuit caused by the deformation of the main board, smell the burnt smell in the case, whether there are burnt chips on the main board, and whether there is any burnt chip on the main board, and around the CPU. whether the capacitor is damaged, etc.
Step 3: If not, then clean the dust off the motherboard and check if the computer is normal.
Step 4: If the fault persists, unplug the reset line and other switches and indicator lights on the motherboard, and then use a screwdriver to short-circuit the switch to see if it can be turned on.
Step 5: If it cannot be turned on, then use the minimum system method to unplug the data cables of the hard disk, floppy drive, and optical drive, and then check whether the computer can be turned on. Then connect the above devices to the computer one by one. When a certain device is connected, the failure recurs, indicating that the failure is caused by this device. Finally, focus on checking this device.
Step 6: If the fault persists, the fault may be caused by memory, graphics card, CPU, motherboard and other devices. Then use the plugging method, the swapping method and other methods to check whether the memory, graphics card, CPU and other equipment are normal. If there is any damaged equipment, replace the damaged equipment.
Step 7: If the memory, graphics card, CPU and other equipment are normal, then discharge the BIOS, use the isolation method, place the motherboard outside the chassis, connect the memory, graphics card, CPU, etc. to test, if the computer can display, then The motherboard is installed into the case and tested until the cause of the failure is found. If the fault persists, the motherboard needs to be returned to the factory for repair.
Step 8: When the computer is turned on, there is no display but there is an alarm sound. When the computer is turned on, the system BIOS starts to perform POST (power-on self-test). When a fatal error is detected in a certain device in the computer, it will control the speaker to emit a sound report. Mistake. Therefore, there may be a fault that there is no display and an alarm sound when the machine is turned on. If there is no alarm sound when the computer is turned on, you can check the faulty device according to the meaning of the BIOS alarm sound to eliminate the fault.
Discharge the BIOS battery (restore the BIOS factory defaults), it is recommended to plug and unplug the graphics card and memory, clean up the hygiene, and polish the golden fingers of the graphics card and memory.
