Help! lenovo thinkpad yoga l13 missing Power Ic

[m0seba]

hi guys
i got laptop lenovo Yoga L13 with no power
when i extracted motherboard i found missing IC



after that i contact with customer, he told me someone already try to fix it and show me photo taken by this guy, showing main IC was dead



after looking to this photo i explore that guy tried to remove Dead IC and replace it with that another IC that next to the main IC

i think he thoughts this may be work, but it didn't work

so this IC must be returned to its original location
but i don't know name of missing IC
i try looking for all pics in internet but i found nothing
Unfortunately, all pictures are not clear

So PLZ anyone have any idea or what i can do ?
thanks

[mon2]

Re: Help! lenovo thinkpad yoga l13 missing Power Ic

Hi.

1) had to zoom in your missing IC PCB silkscreen but the label is U7403.

2) U7403 is the same as U7503.

3) Both of these parts are for the USB type C connector protection for ESD & overcurrent / over voltage levels. One for each Type C connector.

4) The p/n is housemarked by Lenovo but "SN" = Texas Instruments. The datasheet for the true p/n is attached. You should be fine to solder in this part from TI.

A small issue is that the part is not readily available due to worldwide semiconductor crisis. Perhaps you can source through Aliexpress?

U7403 & U7503 = Texas Instruments p/n TPD8S300RUKR

https://www.aliexpress.com/premium/T...psort=1&page=1


Lenovo has p/n SN1710033RUKR-1-GP. Note the suffix = "RUKR" which is the same suffix used by TI for their p/n and helps us to solve this mystery.

The pinout from the TI datasheet matches the Yoga 13 schematic.

Fairly confident that you should be able to drop in replace this part from TI to fix this logic board.

[m0seba]

Re: Help! lenovo thinkpad yoga l13 missing Power Ic

ok i will buy this part and try this method
thank you so much for help