Lenovo T450 motherboard nm-a251 - No charging

There is no charging. The system shows that it is charging.
Does anyone have any schematic for the above CD?

Are you sure that the battery is operational?

because I have the same disc on which there is no picture and if I insert these two batteries into this disc, the batteries (external and internal) will be charged

You will not find the motherboard scheme, you only have to check the integrated circuits one by one. Without a battery, it normally detects the lack of it?

R@F@L wrote:

Does anyone have any schematic for the above CD?

The diagram is not available at the moment.
Upload photos from both sides in HD, provide the cast of key components.
The results of the measurements made are welcome.

Give voltage measurements from the charger.
What is this mysterious cord?

T450 NM-A251 rev.1.0 under i5-5300U (SR23X) / i7

You have the model: EU (Systemboard 00HN525) or ver. from the USA?
- kbc SMSC MEC1633L-AUE / or MEC1619L-AJZP
- you have two Flash cards or one

Read about other platforms in this series NM-Axxx based on the same charger_connector: U7 BQ24760T , housing: QFN40 (4x 10)
- I wrote about him on the occasion of the Skylake platform

Page, from cpu / * (SoC, all in one) and charger U7 Link

ps
You do not have a warranty?
This is a new model from the middle of 2016.

Model
Lenovo ThinkPad X240
VIUX1 NM-A091 Rev: 1.0, 2013-04
was on kbc (MEC1633L-AUE) and the same i5-5300U
- Lenovo ThinkPad X240. FRU: 04X5162, i7-4600U
- Lenovo ThinkPad X240. FRU: 04X5168, i5-4300U

* LA-A901p, same cpu

See page 40, Wisstron Storm platform, cpu: Ivy Bridge ULV + HM77 chipset
- charger bq24760 / without the letter T
- look if there are differences in the pins
- I will check tomorrow at work

KBC-MEC16133L-AUE
Charger - BQ24760T

Charger changed into another and the same.
There is no guarantee.
Attachments of photos and voltage measurements. The voltages in brackets refer to the board in which there is charging and there is no picture. Voltages without brackets - the image board works and has no charging.

The BIOS from the disc that has the image has been played to a disc that has no image and is the same.

Cable - one path was damaged and restored on the wire.

And what about the field in cz. responsible for charging Aku?
Look at the Aku zloty, or the Battery Input chip

This BQ communicates on the SMBus bus

Load datasheet on
- BQ24765
SMBus-Controlled Multi-Chemistry Battery Charger With Integrated Power MOSFETs
Link
* similar BQ24770 Link

- or BQ24730RG (QFN40)

On the org BQ24760 / 24760T has no datasheet , enclosure QFN40 / LDQFN-28

Look p.39-40 SM for the platform Wistron_Storm Link_ Wistron_Storm


The same charger together with the system. Battery Input
showing in SM from IBM, the Wistron platform. Dasher-2
(LDB-2 91.4RA01.001)

hi
need the bios bin please

see if this BQ circuit .... gets VCC power supply through a 10 ohms resistor ... should have 19V on the crash if not replace this resistor they like to burn ... that's exactly what I exchanged for lenovo flex 3 15 days ago; the resistor had 500 ohms!

Added after 5 [minutes]:

I found the T460s diagram and it helped me ...

I confirm the pragmatics post, the same fault and the 10 ohm resistor was burnt (as in the photo.)

https://obrazki.elektroda.pl/8055078800_1613926099.png

Excavations - but maybe it will be useful to someone.

I had a problem, the T450 won't charge and won't get up under the power supply - reason: used internal battery - removing the internal battery did the trick.

On the occasion of the question about the diagram of the board, I recently came across something like this (unfortunately for 4.5 EURO)
:
https://realschematic.com/shop/11053/desc/lenovo-thinkpad-t450 " target="_blank" rel="noopener nofollow ugc" title="http:// https://realschematic.com/shop/11053/desc/lenovo-thinkpad-t450 " class="postlink inline-block "> https://realschematic.com/shop/11053/desc/lenovo-thinkpad-t450

The same on Polish - here PLN 12:
https://www.elvikom.pl/schemat-lenovo-thinkpa...cfc-aivl0-nm-a251-nm-a252-cobain2-t58957.html " target="_blank" rel="noopener nofollow ugc" title="http:// https://www.elvikom.pl/schemat-lenovo-thinkpa...cfc-aivl0-nm-a251-nm-a252-cobain2-t58957.html " class="postlink inline-block "> https://www.elvikom.pl/schemat-lenovo-thinkpa...cfc-aivl0-nm-a251-nm-a252-cobain2-t58957.html

Only here - https://www.elektroda.pl/rtvforum/topic3908901.html