Judging whether the chip is burned out is actually very easy to check, it is easy to see the problem from the power supply, no working current ah, working current is too large ah, power supply voltage jump ah can be seen, from the manufacturer to obtain single-chip microcomputer burning software, do not burn the program, erase it can see the problem.
However, there will be a situation, that is, a part or peripheral is broken, it may not be able to see the reaction (working parts can not be used, but the overall normal can not see the pit), at this time you need to single-step debug to the problem of the program part, combined with oscilloscope multimeter and other observation parts work normally.
To determine whether the chip has been burned, first look at the appearance, if there is a black burn mark on the appearance or a melting phenomenon, then it must be burned.
The second is to see the use, if the chip is inserted into the running computer, if it can not read normally or there is no reaction, then it may be broken and there is a multimeter, the multimeter to the electrical block, if the resistance display is very large, then it represents burned out.
To determine if the chip is burned out. Feel whether the chip is being used or connected. Yes. Working. Ability If there is no working ability, the chip has burned out. At this time, it is necessary to choose the same type of chip for replacement. In order to determine whether the chip burned out at the same time, can also. For the measurement of the multimeter, if there has been a discontinuity on the channel, or to observe that there has been a burnt place, it needs to be replaced.
1, first of all, after the chip is broken, the CPU will not work, that is to say, the CPU will have no temperature after the motherboard is powered on, this time you can use the diode gear of the meter to test the inductor and the resistance of the ground if the meter drops after the resistance value rises to prove that the power management chip is good, on the contrary, there is a problem.
2, the detection of the peripheral power supply of the chip is normal, but the voltage of the power management chip is abnormal. You can first check the voltage of the field effect tube G pole, such as paying attention to the resistance value is not the same, basically confirm that the chip is problematic.
Use a multimeter to measure the resistance.
Because how to judge whether the chip is burned out, we can take a multimeter to test whether the resistance value of the chip has resistance, if in the spirit, it may be the chip burned, and then we need to seize the time to repair ah, to deal with can not be plugged in operation, that may cause danger, I hope my answer can help you.
With a multimeter to hit the resistance value, the phenomenon of burning should be infinite resistance or short circuit.