Lenovo Z710 Laptop Fall Issue: Won't Turn On, Power & Webcam LED Blinks, BIOS & Drive Detection

Hello,

A friend provided me with a laptop as in the subject. Her laptop fell from a height of about 1.5 m. The effect is that sometimes the BIOS did not detect the drive at all, and sometimes the system fired normally. I had 5 minutes to sit with it and wanted to run Linux Live from USB. Several times I turned the laptop on and off from the button. After some time, it suddenly does not give a sign of life except for the "Power" diode for 1 second and the webcam diode will flash for a fraction of a second.

What could have happened? Of course, I tried to remove the battery, fire from the power supply itself, etc., but nothing is still the same.

What current does the laptop consume at startup?

Hello.
Enter the designation of the motherboard.

MrDoimer wrote:

The effect is that sometimes the BIOS did not detect the drive at all, and sometimes the system fired normally. [...] After some time, it suddenly does not give a sign of life, except for the "Power" diode for 1 second and the webcam diode will flash for a fraction of a second.

It is possible that the balls under the chipset broke off as a result of the fall - heat it up diagnostically with a hot air soldering iron for several seconds and check the results.
greetings

I wouldn't heat it right away.
The bios charge could still be damaged.

When I am at home, I will measure the power consumption.

I note that it does not have tools such as hot air.
I would like to know how it is possible that the laptop suddenly stopped working when it turned on until recently.
It is true that sometimes at the start of the Lenovo logo, it was restarted.
I would like to add that after connecting the pendrive from Linux Live, after entering the Boot menu, the only option of booting from the network was visible, so I could not even start Linux.

Anything else I can do at home?
Thank you for your answer.

MrDoimer wrote:

I would like to add that after connecting the pendrive from Linux Live, after entering the Boot menu, the only option of booting from the network was visible, so I could not even start Linux.

This may indicate damage to the chipset or its connection to the board. It can also be a problem with the BIOS input - the programmer is necessary here (at home it can be assembled from an LPT plug and a few resistors - https://www.elektroda.pl/rtvforum/topic2602823.html).

MrDoimer wrote:

I note that it does not have tools such as hot air.

You specialize in "computers, electronics", so I think you'll find a match.
The worst possible scenario may be the failure of the plate as a result of microcracks in the tracks due to a fall - then the plate may only be suitable for donating parts.
greetings

Dydelmax wrote:

You specialize in "computers, electronics"

Stationary

Dydelmax wrote:

so I think you will find a match.

A dryer with a narrow nozzle probably won't work, right ? I won't find anything else.

Moderated By RADU23:

All types of household appliances are not devices used to repair computer components. We do not talk about them in the "Computers" sections.

Dydelmax wrote:

This may indicate damage to the chipset or its connection to the board.

I understand that the only way to be sure this is by heating the circuit? Apart from the possible damage to the BIOS.

xoree wrote:

The bios charge could still be damaged.

From the fall?

Dydelmax wrote:

It is possible that the balls under the chipset broke off as a result of the fall - heat it up diagnostically with a hot air soldering iron for several seconds and check the results.
greetings

If the connections under the system were broken, heating will not do anything.

MrDoimer wrote:

I understand that the only way to be sure this is by heating the circuit? Apart from the possible damage to the BIOS.

No.
You were supposed to give the power consumption, the plate designation.

boro1234567 wrote:

If the connections under the system were broken, heating will not do anything.

If the laptop is handed over for reballing (they have a 3-month warranty on offer), what does it look like? They will heat up and say "no sorry, but the connections under the system have broken off, so $$ and goodbye"?

boro1234567 wrote:

You were supposed to give the power consumption, the plate designation.

I won't make it today, but I will provide this data tomorrow.

boro1234567 wrote:

From the fall?

Not from a fall, but from switching off and switching off during the diagnosis (he walked - he stopped walking).

MrDoimer wrote:

Several times I turned the laptop on and off from the button

Added after 11 [minutes]:

MrDoimer wrote:

If the laptop is handed over for reballing (they have a 3-month warranty on offer), what does it look like? They will heat up and say "no sorry, but the connections under the system have broken off, so $$ and goodbye"?

No Reball involves removing the old binder (usually lead-free to lead-based binder) and replacing with the new one. Of course, it has a positive effect if the balls in the core of the BGA chip are not damaged.

Of course, the bios may spill out from the fall, it springs out spontaneously under the influence of such interference as a fall, all the more so. However, the fault indicates broken pads under the BGA. greetings

Maybe, but unlikely, rather constant switching on and only damaged the batch.

In some, Lenovo will not start if the bios battery is dead. Maybe somewhere she got hit after the fall?

Welcome back!
A friend took the laptop for service, but it is a "neighborhood shop" and she did not even receive a repair report. She claims that "they exchanged some arrangement" and she paid PLN 300. I think they probably did reballing. Now the laptop turns on and works, but only the USB3.0 ports are working (!) [On the left side, both] and on the right side USB 2.0 shows no sign of life.
Sound is also not working. The drivers are all there, no yellow exclamation marks in the device manager. In the audio mixer, you can see the system "deliver" the sound, but you can't hear anything. No response after plugging in the headphones.
The service told her, when she reported the above-mentioned faults, that "they got a laptop with a symptom of not turning on and they took care of it" ....

MrDoimer wrote:

Now the laptop turns on and works, but only USB3.0 (!) [Left side, both] ports are working, and on the right, USB 2.0 shows no sign of life.

The fragment I bold could give hope that the website forgot to plug in the tapes from the PCB with USB and 3.5 mm Jack sockets. However, I do not want to believe that they did not connect the speakers either.
At the moment, the words of a colleague may be prophetic boro1234567 :

boro1234567 wrote:

If the connections under the system were broken, heating will not do anything.

In the service, they apparently ended up heating up ...
greetings

You need to check the series and year of production of the system + see if there are any traces of soldering (flux, damaged laminate of the system - from the reball as they screwed into the stand).

MrDoimer wrote:

Now the laptop turns on and works, but only the USB3.0 ports are working (!) [On the left side, both] and on the right side USB 2.0 shows no sign of life.
Sound is also not working.

Advertise the service or demand a refund because for such an amount it should be like from the factory, I do not tolerate bungling and incompetence