What about the motherboard short circuit

Troubleshooting for motherboard short-circuit:

What is the reason for the motherboard short circuit, how to solve? We often take down the motherboard to clean, and so on when you forget the switch and reset button that row of pins is inserted, with the copper key in the row of pins swept a bit, saw sparks Flash, the motherboard has no movement.

According to the description of the phenomenon of the analysis should be the power switch or reset key problem? Pull those plugs down and then use a metal chip to short-circuit the motherboard on the switch pins, or no movement. And then remove the power to replace the author's good power, but the fault is still.

Disconnect the motherboard from the chassis, remove the memory and CPU, and use the motherboard diagnostics card to diagnose it. The diagnostics card is plugged into the motherboard expansion slot to power the motherboard and there is no response on the diagnostics card. decided to force the motherboard to power on the main plug on the power supply has a block button on the side of the Green Line (some are gray), it with the next black line short connect the power is started. Find the root cuttings needle on the back of the motherboard that is connected to the Green Line, use tweezers to connect it with the side of the black line of the root cuttings needle short together, in the moment of power on the "diagnostic card" on the power led flashing, it appears that the motherboard somewhere short circuit and the Power protection device action.

But the motherboard is so big, so many components and how to check up? Since there is a short circuit exists, then it should be at the upper level of fever, non-stop fast connection to the two root cuttings needle, dozens of times after beginning to touch the motherboard near the power plug components, found that CET ceb6030l this pipe hot, It looks like either it's broken or there's a short circuit near the component. Remove it with a soldering iron and use a multimeter to find it is good. such as the CET ceb6030l pipe in a total of two near the CPU socket, it seems that the composition of the tube to the CPU power to adjust the role. Follow the line down and found the HIP6018BCB this small integration block, if it burns short circuit so cet ceb6030l is bound to fever. With a soldering iron and a tin-absorbing device to scrap the Dickens the integration block to be removed, and then the motherboard power to find the motherboard can be on the power, CET ceb6030l also not hot, it seems that HIP6018BCB this integration block really bad.

Bought a piece of the same type of scrap board. Remove the HIP6018BCB on the scrap board to weld the motherboard to a friend, then power on the motherboard, and the power led on the diagnostic card shows that everything is OK. Install the CPU and memory and press the power switch, "diagnostic card" on the digital tube number began to beat, from "C1" to "03" and then to "05" and Back to "C1" from this began to cycle, it seems that the motherboard has more than one fault.

Open the "Diagnostic card" manual, which says "If you repeat the manufacturing test 1 to 5, you can get 8042 control status". Find the "8042 control state" Aspects of the information, are very vague, the effect is related to the input and output. The IC chip that controls the input and output on the motherboard is Winbondw83977ef-aw. Motherboard power on for a long time and it is not hot at all, so a large integration block will be bad? A little grasp, but decided to try another. Disassemble this integration block rely on the author's soldering iron and tin can not, so to do mobile phone repair friends there, in his 850 hot air welding platform will be removed, and then the chip on the scrap board to weld up. The author again put the CPU and memory installed, and then connected to the keyboard, monitor, turn on the power switch, started smoothly into the system, running the program is also normal.

The motherboard short-circuit failure can also be repaired on its own, requiring only basic electrical knowledge and simple equipment (such as "Motherboard diagnostics card"). Although it is necessary to keep the interior of the computer chassis clean, it is recommended that you do not remove the motherboard for cleaning when cleaning the computer chassis. If it is just dust, it is recommended to use a small brush to sweep the ash out again, conditional can be used to clean the hand-held vacuum cleaner, lest cause unnecessary trouble.