Suspected to be wet and the motherboard (can not be switched), will be how to solve?
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Experts answer: computer starts without display troubleshooting method (see if there is the drum of the capacitor). Step 1: First check the computer's external wiring is connected to each connection re-inserted again to see if the fault is ruled out. Step 2: If the problem persists, then open the main chassis and see whether the excess payments within the chassis Metal object deformation caused by short circuit or motherboard, chassis, and whether the smell of burnt paste flavor, without the burnt chip on the motherboard, CPU, etc. around the capacitor is not damaged. Step 3: If not, then clean up the dust on the motherboard, then check whether the computer normally. Step 4: If the problem persists, then unplug Reset line on the motherboard and other switches, light connection, and then short-circuit switch with a screwdriver to see if can boot. Step 5: If you can not boot, then use the minimum system method, the hard drive, floppy drive, unplug the drive's data, then check whether the computer can boot the boot if the computer displays, painting Surface, the problem in these devices. Then, one by one over several devices to access the computer, when access to a particular device, the failure to reproduce, indicating that the failure was caused by this device, and finally focus on examination of the device. Step 6: If the problem persists, then the fault may be caused by memory, graphics card, CPU, motherboard And other equipment caused. Then use the plug method, exchange and other methods were examined memory, graphics, CPU and other equipment is normal, if there is damage to the equipment, replacement of damaged equipment. Step 7: If the memory, graphics card, CPU and other equipment properly, then the BIOS discharge, the use of isolation, the board placed Outside of the chassis, connected to memory, graphics, CPU and other tests, if the computer can display, and then install the motherboard to the chassis and then testing, until you find the problem. If the fault is still the need to return the motherboard manufacturer repair. Step 8: computer boots but no display alarm, when the computer boot time , The system BIOS to start POST (Power On Self Test), when the computer detects a device with a fatal error, they control the speaker sound reporting errors. Therefore, there may be no display power failure alarm. For the computer starts without showing fault alarm can sound the alarm BIOS The meaning of failure to check equipment to troubleshooting. The BIOS battery discharge (recovery BIOS factory default) recommended plug about graphics cards, memory, and clear up health and polished graphics, memory cheat. Fault diagnosis motherboard (motherboard failure can cause can not be switched): Computer motherboards structure is complicated, relatively high failure rate, fault distribution are more dispersed. According to the fault generation source, the motherboard power failure, failure can be classified, bus faults, failures and other components. The main reason causing the motherboard failure include the following. 1, components reasons: the chip on the motherboard and other components of poor quality, Damage caused by aging of the motherboard, causing the motherboard failure. 2, human reason: the use of computer, hardware or indiscriminate use of free hot metal to touch a variety of joints causing board failure. 3, dust, electrostatic reasons: due to dust or static electricity caused the motherboard is bad, short or burnt chip on the motherboard, and lead To motherboard failure. Bad reasons: due to rust, oxidation, less flexible, pin sealing off, break the motherboard in a variety of other causes, chip, socket, interface is bad, which led to the motherboard failure. The characteristics and fault for the cause of the motherboard, when the board fails, the motherboard fault diagnosis method is as follows. 1 Steps: First, check carefully view all the motherboard slots, fans, chips, etc. There is no signs of damage: whether the motherboard burned, blown, foaming, the board break, jack rust, exploding capacitors to the place: BIOS the battery has power. If there is obvious damage to the targeted areas to repair. Step 2: If Motherboard no obvious signs of damage, then clean with a soft brush the dust board, clean up after the examination board is normal. If normal, it is the dust caused by the failure. Step 3: If, after cleaning up the dust, or not normal, then the motherboard with a multimeter to measure the various supply voltage is normal (+5 V, +1 2V, +3.3 V, etc.). If the voltage is not normal, check the power supply and motherboard power circuitry is defective. Step 4: If the motherboard voltage normal, and then to the motherboard power check to see whether the heat of the chip in the motherboard. If you have a fever chip, first check the heat of the chip inputs and outputs, Whether a signal (see waveform). If the input signal, no output signal, and then check whether the chip clock signal fever. If so, then this chip is damaged, replace the can; If no clock signal, the chip along the line connecting the former to check the chip level, until you find the fault components. Step 5: Find it After the barrier components and not to remove from the motherboard, you can then use the same type of chips above it, and then see if the normal boot. If the motherboard fault disappears, the chip is damaged, replace the chip. Step 6: If the motherboard malfunction persists, then use the tangent line by line method to find short. If you find some of the signal line and the ground or +5 V voltage lines, and short-circuit and cut off the line and then measured to determine the chip problem or motherboard problem of circuit board traces. Step 7: If the above method not work, find a control method using the same type of motherboard chip pin control measurement of the corresponding waveforms and parameters, to confirm the chip is damaged.
Experts answer: computer starts without display troubleshooting method (see if there is the drum of the capacitor). Step 1: First check the computer's external wiring is connected to each connection re-inserted again to see if the fault is ruled out. Step 2: If the problem persists, then open the main chassis and see whether the excess payments within the chassis Metal object deformation caused by short circuit or motherboard, chassis, and whether the smell of burnt paste flavor, without the burnt chip on the motherboard, CPU, etc. around the capacitor is not damaged. Step 3: If not, then clean up the dust on the motherboard, then check whether the computer normally. Step 4: If the problem persists, then unplug Reset line on the motherboard and other switches, light connection, and then short-circuit switch with a screwdriver to see if can boot. Step 5: If you can not boot, then use the minimum system method, the hard drive, floppy drive, unplug the drive's data, then check whether the computer can boot the boot if the computer displays, painting Surface, the problem in these devices. Then, one by one over several devices to access the computer, when access to a particular device, the failure to reproduce, indicating that the failure was caused by this device, and finally focus on examination of the device. Step 6: If the problem persists, then the fault may be caused by memory, graphics card, CPU, motherboard And other equipment caused. Then use the plug method, exchange and other methods were examined memory, graphics, CPU and other equipment is normal, if there is damage to the equipment, replacement of damaged equipment. Step 7: If the memory, graphics card, CPU and other equipment properly, then the BIOS discharge, the use of isolation, the board placed Outside of the chassis, connected to memory, graphics, CPU and other tests, if the computer can display, and then install the motherboard to the chassis and then testing, until you find the problem. If the fault is still the need to return the motherboard manufacturer repair. Step 8: computer boots but no display alarm, when the computer boot time , The system BIOS to start POST (Power On Self Test), when the computer detects a device with a fatal error, they control the speaker sound reporting errors. Therefore, there may be no display power failure alarm. For the computer starts without showing fault alarm can sound the alarm BIOS The meaning of failure to check equipment to troubleshooting. The BIOS battery discharge (recovery BIOS factory default) recommended plug about graphics cards, memory, and clear up health and polished graphics, memory cheat. Fault diagnosis motherboard (motherboard failure can cause can not be switched): Computer motherboards structure is complicated, relatively high failure rate, fault distribution are more dispersed. According to the fault generation source, the motherboard power failure, failure can be classified, bus faults, failures and other components. The main reason causing the motherboard failure include the following. 1, components reasons: the chip on the motherboard and other components of poor quality, Damage caused by aging of the motherboard, causing the motherboard failure. 2, human reason: the use of computer, hardware or indiscriminate use of free hot metal to touch a variety of joints causing board failure. 3, dust, electrostatic reasons: due to dust or static electricity caused the motherboard is bad, short or burnt chip on the motherboard, and lead To motherboard failure. Bad reasons: due to rust, oxidation, less flexible, pin sealing off, break the motherboard in a variety of other causes, chip, socket, interface is bad, which led to the motherboard failure. The characteristics and fault for the cause of the motherboard, when the board fails, the motherboard fault diagnosis method is as follows. 1 Steps: First, check carefully view all the motherboard slots, fans, chips, etc. There is no signs of damage: whether the motherboard burned, blown, foaming, the board break, jack rust, exploding capacitors to the place: BIOS the battery has power. If there is obvious damage to the targeted areas to repair. Step 2: If Motherboard no obvious signs of damage, then clean with a soft brush the dust board, clean up after the examination board is normal. If normal, it is the dust caused by the failure. Step 3: If, after cleaning up the dust, or not normal, then the motherboard with a multimeter to measure the various supply voltage is normal (+5 V, +1 2V, +3.3 V, etc.). If the voltage is not normal, check the power supply and motherboard power circuitry is defective. Step 4: If the motherboard voltage normal, and then to the motherboard power check to see whether the heat of the chip in the motherboard. If you have a fever chip, first check the heat of the chip inputs and outputs, Whether a signal (see waveform). If the input signal, no output signal, and then check whether the chip clock signal fever. If so, then this chip is damaged, replace the can; If no clock signal, the chip along the line connecting the former to check the chip level, until you find the fault components. Step 5: Find it After the barrier components and not to remove from the motherboard, you can then use the same type of chips above it, and then see if the normal boot. If the motherboard fault disappears, the chip is damaged, replace the chip. Step 6: If the motherboard malfunction persists, then use the tangent line by line method to find short. If you find some of the signal line and the ground or +5 V voltage lines, and short-circuit and cut off the line and then measured to determine the chip problem or motherboard problem of circuit board traces. Step 7: If the above method not work, find a control method using the same type of motherboard chip pin control measurement of the corresponding waveforms and parameters, to confirm the chip is damaged.
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