I no longer suspect anything with tbt or charging. It seems the board is getting 19v fine, testing the coils I get 5v and 3.3v out of those. I have a t14 that is pretty similar, that I used to tale some readings from just to see if anything was wildly different, and what would not have power with the board off. I Right now it just seems like the power signal isn't coming on or being read. I bypassed the power button, obviously did not work.
The power button is on a daughter board. What is odd is when I was probing it to see what pins were for the button and which ones were for the...
Whale linguini
Member
Last Activity: 03-07-2025, 02:51 PM
Joined: 05-20-2024
Location: MN
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oh I see why I am confused some. Have 2x posts going on. I thought this looked like it was lacking some thing
[url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/3336960-p14s-gen-2-thunderbolt-eeprom[/url]https://oh I see why I am confused s...-gen-2-thunderLeave a comment:
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Oh awesome thank you! What did I mess up doing this?
Mine clearly didn't work, the original FW would still negotiate 20v, the modified cap I had tried to make it wouldn't do anything other than 5v. Which, I am not shocked my attempt failed. I just saw at the start of the bin looking at the hex, the cap had a bunch of junk, but seemed to align a few dozen lines down, so I tried to swap that part around....Leave a comment:
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c5713 and c5704 are MIA[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"01.png","data-attachmentid":3405653}[/ATTACH]...
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J6501 and 6502. Looks like they should be jumpered, guessing someone just reflowed them to be sure. Trying to get a picture of things but I am still trying to figure out where I set my phone down. There may be 2 small caps that.... I just cannot tell if are unpopulated or missing that are near the usbc/tbt port.
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"Untitled.png","data-attachmentid":3405331}[/ATTACH]...Leave a comment:
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Well I tried writing 0s, verified, nothing. Wrote the bin from the post above on to it just to see what would happen, back to where it was. Will negotiate 20v, pulls 500ma, does not appear to charge, will not power on.
I'm sure this is a given, but when I blanked the eeprom etc then it wouldn't negotiate 20v. Which... since it's blanked... makes sense. The fw I tried by modifying the cap did not want to work. If I write my backup to it or use the one from the thread above, then it negotiates 20v again.
Wondering if this is even a tbt issue at this point. I just kind of...Leave a comment:
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So when I look up the firmware on lenovos site, its giving me n34br05w.exe
[URL]https://download.lenovo.com/pccbbs/mobiles/n34br05w.exe[/URL]
Intel Thunderbolt Retimer Firmware Version 1.2.29.0
when I extract that, I do not get a .bin of any type, just a .cap.
I tried to extract from that, and modify the header etc, but not sure if I did it correctly along with the final padding. I do recall seeing that it said somewhere in their t14s gen2 / t15s gen2 (I think it was t15s) and both pointed to the same fw download.
I did blank the tbt eeprom and...Leave a comment:
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p14s Gen 2 thunderbolt eeprom dump
P14s Gen 2
HT4B0/HP4B0/HT5B1/HT4B2
NM-D352 Rev 1.0
sn PF-35P15W
Requesting thunderbolt dump
also attached is the tbt dump. I extracted the bin from the cap file and modified it, not sure if it's correct. also didnt work.... -
Well the button seems to work so at least it's not anything that stupid (or maybe I wish it was haha). Hopefully I didn't wreck the 1.8v W25Q80EW which looks like thats for the nvidia gpu. The W25Q80DV (3.3v) it on the topside of the board. When I did dump the W25Q80EW to see what it was, I doubled down on stupid and blanked it. Before checking if my dumps were good... which they were not... But the differences just seem to be in the filler having a few 0x00 instead of 0xFF, so... probably not an issue. I forget what I was doing exactly, but I dumped it, then blanked or did something instead of...Leave a comment:
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Well I am out of ideas now. Someone has dug into this machine before. Noticed some brackets are missing, heatsink has clearly been off because the thermal pads were all torn up. I checked everything to make sure ribbon cables are plugged in correctly etc just to make sure the issue wasn't from something stupid.
Originally, I got the laptop as no power/no charge. Plugging the charger in, would light the orange charge light, but the light would stay on after disconnecting the charger. I blanked the tbt eeprom, made no difference. I swapped a battery from a T14 Gen 1 (same part#) And...Leave a comment:
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Don't think it did any damage. Seems to read fine and looks valid enough. for some reason the only FW I can find for a p14s gen2 on lenovos site is packaged as a .cap for some reason. Guess I will just blank it and see if it attempts to charge after that first I guess.Leave a comment:
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Hopefully that didn't do any damage.... whoops... 25Q80... D/DW (iirc) 3.3v EW... 1.8v. I don't own any 1.8v anything, ordered an adapter for my ch341a, God I hate this programmer... Just found the lenovo thunderbolt firmware seems to be packed as a .cap as well? fun.Leave a comment:
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Well there's 'uvbios' thats a winbond 25Q80EW but... thats not right is it?
Edit: aww shit. this is 1.8v..Leave a comment:
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thank you much!...Leave a comment:
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Need ThinkPad P14s Gen 2 - NM-D352 REV1.0 BoardView
Trying to find this boardview, cannot seem to find a working link. -
ah, kinda figured that 'pq' probably denoted something that would not be what I was looking for. I must be blind, not seeing anything.. hmm.....Leave a comment:
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Shoot, was not apparent just looking at it. I did just notice PQ0101 and PQ0202 that may be it?Leave a comment:
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p14s Gen 2 thunderbolt eeprom
I have a p14s gen2 board says
HT4B0/HP4B0/HT5B1/HT4B2
NM-D352 Rev 1.0
I need to flash the thunderbolt eeprom, laptop now fails to charge or power on. Can anyone confirm the IC? I think it is u6701 but I cannot read the chip (read the text on the top I mean). I don't see anything else that really looks like it would be it.
Could anyone help me out if this is the correct one? I am new and still learning some so I wanted to be sure.
Thank you! -
That looks pretty cool. I have been looking for something super basic and lightweight like that. I'm not interesting in a whole online/cloud what have you. And while odoo is great and all, it's quite overkill for what I am trying to do now. I did try to 'slim' it up some by making a portable wrapper for it, while that works and all... not sure if I have the motivation to do the setup on the repair parts. It is decently not super painful to make something like that, I'm just debating how much I want to deal with 14gb of crap when I'm making 100kb changes. Just a lot of overhead. You can find my...Leave a comment:
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Yes I have been meaning to jump on their forum. I did figure out that the HW used is actually just a off the shelf (sorta, it is customized to an extent, but it looks like it operates exactly the same) CY7C68013A-56 EZ-USB FX2LP dev board, which is only a few dollars. Not that $70USD is very much, probably better off supporting them. I guess if for some reason you are unable to get one in your country, perhaps that could be a work around. I have not verified anything yet. Meant to post on their forum....Leave a comment:
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