Lenovo Thinkpad E15 Gen 2 NM-D011 - No display ? External , yes!

[m1ch43lzm]

Looking back at your pictures, could you post an updated picture of this area?

Are those caps highlighted in green missing? Those are needed for EDP signaling, CG13, CG14, CG15, CG16, CG17, CG18, you won't get a picture without those...

The caps in red are also badly soldered, but unrelated for now

Resistance looks fine on BL_ON (50.5k), now fix those missing caps for EDP signals, your customer sure made a mess on the board

[AccountSaver]

Looking back at your pictures, could you post an updated picture of this area?

Are those caps highlighted in green missing? Those are needed for EDP signaling, CG13, CG14, CG15, CG16, CG17, CG18, you won't get a picture without those...

The caps in red are also badly soldered, but unrelated for now

Resistance looks fine on BL_ON (50.5k), now fix those missing caps for EDP signals, your customer sure made a mess on the board

Yes, but what can you do ? Customer is always right. To my understanding he will not bother , to even pay for that service. So most probably will reject the repair and i will keep the laptop or something for labour. So for now , i would say i am repairing it for personal knowledge and gaining experience.

The 'green'eveything is missing , the red is a little bit better...

So most probably i need to order parts for the CG13,CG14 , from aliexpress....

[SMDFlea]

Yes, but what can you do ? Customer is always right.

[AccountSaver]

hahahaha <3

[m1ch43lzm]

Yes, but what can you do ? Customer is always right. To my understanding he will not bother

Don't want to blame anyone yet, but that kind of damage could be done either by the customer himself, or "his friend" that will do it for cheap but ends up making it worse
Always a good idea to take pictures before a repair, to cover yourself in case something goes wrong with the customer

maybe he thought that there was a short and ended up removing caps at random, then replaced the LCD cable (or the whole display assembly, from the AMD version), then gave up after making it worse
Or the opposite, the original screen could have cracked (or just didn't show a picture), then he/"his friend" replaced the whole display assembly with one from the AMD E15 gen2, and not realizing his mistake made it worse
I'm making hypotheses here on what happened here

So most probably i need to order parts for the CG13,CG14 , from aliexpress....

Don't you have electronics components suppliers there, or at least somewhere in the EU?
Might want to check:
Farnell
RS online
TME.eu
Maybe someone has a recommendation for a supplier that ships to Poland

[AccountSaver]

Don't want to blame anyone yet, but that kind of damage could be done either by the customer himself, or "his friend" that will do it for cheap but ends up making it worse
Always a good idea to take pictures before a repair, to cover yourself in case something goes wrong with the customer

maybe he thought that there was a short and ended up removing caps at random, then replaced the LCD cable (or the whole display assembly, from the AMD version), then gave up after making it worse
Or the opposite, the original screen could have cracked (or just didn't show a picture), then he/"his friend" replaced the whole display assembly with one from the AMD E15 gen2, and not realizing his mistake made it worse
I'm making hypotheses here on what happened here


Don't you have electronics components suppliers there, or at least somewhere in the EU?
Might want to check:
Farnell
RS online
TME.eu
Maybe someone has a recommendation for a supplier that ships to Poland

It's not about blaiming or not. I understand how you said it, but i cannot do anything else. Yeah , for future reference i will keep it in my mind .
Yes, maybe he did something like that . Hypotheses most of the times are correct, i believe either plan a or plan b happened also , nothing else. But it's nice that someone else has the similar hypotheses as me hahah!

Eitherway yea , they exist in europe but they charge too much for shipping a small package when aliexpress has it for 2$
I found also a big book with capacitors just to have it on the side, so i bought also this and i am good, so another 3 weeks of waiting hahahahaha

https://www.aliexpress.com/item/1005...503%21%211%210

[m1ch43lzm]

Get the 0201 and 0402 capacitor sample books, also the resistor books of those sizes
For 0603 and 0805 caps, you don't know the voltage rating on those caps in the books, sometimes you need 10-22uF 25V 0603 or 0805 caps, very common to fail shorted on laptops, best to order those separately as the ones in the books may be rated at a lower voltage

Can't beat free/cheap shipping from AliExpress... For me it's way more expensive to order from Digikey as they'd charge me 100$ flat fee shipping to Peru, on mouser it's 30$ shipping, not worth it for 1$ of caps

[AccountSaver]

Get the 0201 and 0402 capacitor sample books, also the resistor books of those sizes
For 0603 and 0805 caps, you don't know the voltage rating on those caps in the books, sometimes you need 10-22uF 25V 0603 or 0805 caps, very common to fail shorted on laptops, best to order those separately as the ones in the books may be rated at a lower voltage

Can't beat free/cheap shipping from AliExpress... For me it's way more expensive to order from Digikey as they'd charge me 100$ flat fee shipping to Peru, on mouser it's 30$ shipping, not worth it for 1$ of caps

Yea ,bought both books as you said before you said it ,same mind

Also about 0603 and 0805 even though it's common i would prefer to get them separate when it's needed rather than going full speed ahead towards it now.

Oh , 100$? Sh*t.
For me it's 15$ even for 1 small package and the 'distance' is like next country border ...

I will try to check also Mouser, but i don't expect much.

[AccountSaver]

Get the 0201 and 0402 capacitor sample books, also the resistor books of those sizes
For 0603 and 0805 caps, you don't know the voltage rating on those caps in the books, sometimes you need 10-22uF 25V 0603 or 0805 caps, very common to fail shorted on laptops, best to order those separately as the ones in the books may be rated at a lower voltage

Can't beat free/cheap shipping from AliExpress... For me it's way more expensive to order from Digikey as they'd charge me 100$ flat fee shipping to Peru, on mouser it's 30$ shipping, not worth it for 1$ of caps

Just checked mouser.

30$ .

[AccountSaver]

Get the 0201 and 0402 capacitor sample books, also the resistor books of those sizes
For 0603 and 0805 caps, you don't know the voltage rating on those caps in the books, sometimes you need 10-22uF 25V 0603 or 0805 caps, very common to fail shorted on laptops, best to order those separately as the ones in the books may be rated at a lower voltage

Can't beat free/cheap shipping from AliExpress... For me it's way more expensive to order from Digikey as they'd charge me 100$ flat fee shipping to Peru, on mouser it's 30$ shipping, not worth it for 1$ of caps

Capacitors just arrived 1 minute ago.

Let's start changing and putting the ones missing and get back to you...

[AccountSaver]

Get the 0201 and 0402 capacitor sample books, also the resistor books of those sizes
For 0603 and 0805 caps, you don't know the voltage rating on those caps in the books, sometimes you need 10-22uF 25V 0603 or 0805 caps, very common to fail shorted on laptops, best to order those separately as the ones in the books may be rated at a lower voltage

Can't beat free/cheap shipping from AliExpress... For me it's way more expensive to order from Digikey as they'd charge me 100$ flat fee shipping to Peru, on mouser it's 30$ shipping, not worth it for 1$ of caps

Well hello there!!!! 👋

As soon as I attached from CG13 all the way to CG18.
WE HAVE PICTURE!!!!!

I will do some tests to make sure.
But come on!! 😀

Yessssss!!!

[m1ch43lzm]

Congrats!
It was a combination of the wrong LCD cable + the missing caps on the EDP data lines

Now fix the remaining caps marked in red in post 41, unfortunately due to forum issues/upgrade the pictures you uploaded were lost

Those are data lines that go to the thunderbolt retimer, the USB-C port attached to it won't work for data if those caps are missing, only for charging

[AccountSaver]

Congrats!
It was a combination of the wrong LCD cable + the missing caps on the EDP data lines

Now fix the remaining caps marked in red in post 41, unfortunately due to forum issues/upgrade the pictures you uploaded were lost

Those are data lines that go to the thunderbolt retimer, the USB-C port attached to it won't work for data if those caps are missing, only for charging

Already done, it charges all ,well diagnostic full . 100% without any issues.
We are good to go

You were amazing, and i gained knowledge .Thank you very much for your time ,effort and knowledge.