Lenovo Xinchao 7000-13 notebook turned on the fan and the screen did not show maintenance.

Lenovo Xinchao 7000-13 notebook turned on the fan wildly and the screen didn’t show. The fault point was placed on the WIFI and hard disk, and it was found that it was caused by the hard disk. The capacitor cracked, replaced it, and the boot test was normal.

[Machine model] Lenovo Xiaoxinchao 7000-13

[Fault phenomenon] The boot current is set at about 0.25, and the screen of the laptop boot fan is not displayed.

[maintenance process]

I received a Lenovo Xiaoxinchao 7000-13. The customer described that the computer suddenly turned off during use, and then turned on the fan, and the screen did not display.

Dismantle the machine, observe that the motherboard has no water inflow and no maintenance, and the inductor of the whole board has no short circuit. It is the same to use the power supply alone after removing the battery and discharging it. After minimizing the motherboard, it is found that the current immediately reaches above 1.0. Put the fault point on the WIFI and hard disk, and it is found that it is caused by the hard disk.

I just repaired a Lenovo Y7000 a few days ago.notebook, but it doesn’t show when it is turned on. The power-on current is around 0.6, and the SSD is hot. Simply measuring the SSD interface of M.2 found nothing abnormal, and directly replaced it with a new SSD, which can be turned on but the system can’t detect the HDD. Then, test that my HDD is also hung up, and ask the customer to change SATA SSD for use.

Lenovo Y7000 notebook, in my impression, the power supply is 3.3V, and the PLT_RST# is normal to the ground and voltage. What other signals will cause the SSD to burn?

Lenovo Xinchao 7000-13 notebook’s power-on fan rotates wildly and the screen does not show maintenance Figure 1

After testing the power supply of M.2′ s hard disk in advance, when the reset is normal, decisively put on a new one, and find that it can be turned on, and the hard disk can also be detected. At this time, disassemble the broken SSD and find the fault point at a glance.