Analysis and solution for XP computer not booting

What should I do if the XP computer fails to boot? I believe that many users have encountered XP computer can not boot this situation. What is going on here? In fact, in addition to system and software factors, it may also be caused by hardware failures. So how can I solve the problem that XP computer can't boot? The following small series introduces you to the failure analysis and solution of XP computer can not boot.

Solution:

Case 1: boot after pressing the POWER button without any reflection, there is no display screen, the motherboard did not hear the horn of & ldquo; drop & rdquo; sound.

Fault Analysis: The internal BIOS data of the motherboard COMS chip is damaged by CIH virus or static electricity, and cannot be read. The system startup cannot complete the self-test, so it cannot be started.

Known solutions: Contact the motherboard manufacturer to replace the new COMS chip or find the BIOS file provided by the motherboard manufacturer using the burner.

Case 2: After pressing the POWER button, the CD-ROM drive flashes, the motherboard power indicator light is on, the power supply is normal, but the screen is not displayed, there is no “drop” sound.

Fault Analysis: This phenomenon occurs after the CPU is damaged. The BIOS first checks the CPU during the self-test. The CPU fails to pass the self-test and the computer cannot be started.

Known solutions: Check if the CPU is installed correctly, check if the CPU core is damaged, use the replacement method to check if the CPU is damaged, and if the CPU is damaged, replace the CPU.

Case 3: There is no display at boot, no prompt, the motherboard power is normal, the CPU is normal, the fan is normal, but the screen is not displayed. There is also no self-test through the "drip" sound.

Fault Analysis: After using the computer for more than 3 years, the battery voltage for the BIOS setting is gradually reduced, and the data cannot be saved. In some motherboards that use the early chipset, the self-test cannot be completed. There is no problem with the hardware itself.

Known solutions: Purchase a lithium battery of CR2032, replace the existing battery on the motherboard to complete the self-test, and then reset the BIOS parameters.

Case 4: After pressing the POWER button, the computer will automatically shut down or nothing happens.

Fault Analysis: Some motherboard manufacturers have caused the CPU to burn out in order to protect the CPU from the heat sink. The CPU fan is not installed or the CPU fan power cable is not connected to the motherboard CFAN interface, or the CPU is connected. When the fan is connected to the SFAN (on the interface of the system fan), it will not turn on.

Known solutions: Connect the CPU fan to the motherboard's power connector correctly and confirm that it is connected to the CFAN's three-core dedicated CPU fan connector next to the CPU.

Case 5: After pressing the POWER button, the self-test cannot pass, the display is not displayed, and the indicator light is orange or blinking.

Fault Analysis: During the self-test, the graphics card did not pass the self-test and could not complete the basic hardware detection and could not be started.

Known solutions: Check if the gold finger of the graphics card is oxidized or a large amount of dust in the AGP interface causes a short circuit, wipe the gold finger with the rubber, and use the leather tiger to clean the dust in the AGP interface. At the same time, use the replacement method to eliminate the problem of graphics card damage. If the graphics card is damaged, replace the graphics card.

Scenario 6: After the boot, the self-test was not completed, and no sound was heard. At the same time, a continuous “drop-drip-drop” was issued. . . ” Sound.

Fault Analysis: According to the description of the BIOS alarm tone provided by the BIOS manufacturer, the problem is generally in the memory, the probability of memory corruption is relatively small, most of the problems are due to memory oxidation or poor slot contact. Caused.

Known solutions: First check the gold finger, memory slot, chip and PCB for signs of burnout, if there is a suggestion to replace the memory. If not, use the eraser to gently rub the gold finger and reinsert it into the memory slot.

Case 7: After the power is turned on, the power is normal, but the NUM and other indicators on the keyboard are not flashing. Unable to complete self-test.

Fault Analysis: The keyboard controller or I/O chip of the motherboard is damaged, and the self-test cannot be completed.

Known solutions: Replace the I/O chip with the manufacturer and check the keyboard interface circuit.

Case 8: Pressing the POWER button does not respond, and the power and hard disk indicators are not lit.

Fault Analysis: By using a multimeter to check the output voltage of the power supply, it is found that 12V 5V 3.3V is abnormal, and the standard voltage is very different, and there is a problem in the internal circuit of the power supply.

Known solutions: After replacing the high-quality 300W power supply, the problem is solved.

Case 9: The components in the chassis are removed and tested normally. When the chassis is installed, it cannot be turned on. Sometimes the chassis can be turned on normally and cannot be turned on after being placed flat.

Fault Analysis: Some chassis are not made in standard, which causes some motherboards to deform after installation or cause some boards to be deformed. The bottom of the motherboard is in contact with the chassis, causing a short circuit and causing failure to boot.

Known solutions: Replace the high quality chassis and install the components using standard accessories.

Situation 10: The power light flashes rapidly after the power is turned on or the POWER button is pressed. The screen is not displayed.

Fault Analysis: Sometimes the POWER and RESET of some poor quality chassis are easy to be stuck inside or short-circuited internally, causing the button to be connected continuously, repeatedly turning on or restarting, causing the illusion that the power cannot be turned on.

Known solutions: Replace damaged buttons or lubricate buttons with some lubricant to reduce friction.

The above is a fault analysis and solution for the XP computer that Xiaobian introduces to everyone. If you are experiencing a computer that cannot be started, follow the steps above.