ThinkPad E15 G4 PD Controller TPS65994AE EEPROM

**SMDFlea** · 03-23-2025, 01:45 PM

Originally posted by 247it

Thanks,

Main firmware R1SET59W(1.30)
PD Hardware ID = 677ee0c5-bedd-4116-ac65-056912e78a79
Version FFFFFF00

I don`t think the version number should be that.. . Your dump is version 1.0.0.1 ,it has two firmwares in it sequentially. The second one has a few bytes that are different to the first. Why it has two and not one i don`t really know, i`m not sure if it`s supposed to be like that, if there should be only one or it`s corrupted.

Attached is new firmware for you to try, copied from the PD update and edited into your dump

Attached Files

try1.zip (5.8 KB, 27 views)

**SMDFlea** · 03-23-2025, 05:42 AM

Is the laptop running OK on the battery. If it is and the charge is above 25% you can try to install the PD firmware from the update executable https://download.lenovo.com/pccbbs/m...spd02w-web.exe

Read the pre-conditions first though ! https://download.lenovo.com/pccbbs/m...pd02w-web.html

Manual Update

Precondition: please install R1SET53W(1.24 )BIOS or above version first, otherwise cannot install this firmware.
1.Plug in the AC adapter into the ThinkPad E14 Gen4 Notebook.
2.Double click "r1spd02w_web.exe" to extract to the folder path C:\FW\WIN\PDFW.
3.The system will update type C PDFW after reboot.

Note:

- Do not insert any Type C device (Dock, Dongle ,Type C disk) when updating PDFW.
- Do not close update tool when updating PDFW.
- Please plug the adaptor to the system and keep battery higher than 25% when update PDFW, avoid failure.

*************************************************************
Support Models
ThinkPad E14 Gen 4 (type 21E3, 21E4) Laptops
ThinkPad E15 Gen 4 (type 21E6 21E7) Laptops
ThinkPad R14 Gen 4 type 21E5 PRC

Operating Systems
Windows 10 (21H2 or later)
Windows 11 (21H2 or later)

**247it** · 03-23-2025, 06:34 AM

Hi SMDFlea, huge thanks for the reply, yes, the laptop does charge and run fine but only charges at 5v 3 amps,
I tried what you suggested yesterday but will have another go today,
the main bios is the latest available as of yesterday, the PD firmware seems to install in windows, however when the computer restarts the firmware doesn't seem to install, just boots straight into windows,
is the bios supposed to interrupt boot to install the PD firmware similar to the main bios install?

**SMDFlea** · 03-23-2025, 08:44 AM

Originally posted by 247it

Hi SMDFlea, huge thanks for the reply, yes, the laptop does charge and run fine but only charges at 5v 3 amps,
I tried what you suggested yesterday but will have another go today,
the main bios is the latest available as of yesterday, the PD firmware seems to install in windows, however when the computer restarts the firmware doesn't seem to install, just boots straight into windows,
is the bios supposed to interrupt boot to install the PD firmware similar to the main bios install?

Can you check which version you have now

Precondition: Confirm the system is at BIOS Version R1SET53W(1.24) or above before proceeding.
1. Hold down the Windows logo key and press X to open a menu at the lower-left area of the screen.
2. Select Device Manager from the menu.
3. Double-click Firmware category.
4. Double-click PD Firmware. (If PD Firmware is not found,check the other "Device Firmware" items.)
5. Select the Firmware tab, 'Detail'->'Hardware Ids',677ee0c5-bedd-4116-ac65-056912e78a79.
6. Check Firmware Version, 'REV_xxxx'.

**247it** · 03-23-2025, 11:41 AM

Thanks,

Main firmware R1SET59W(1.30)
PD Hardware ID = 677ee0c5-bedd-4116-ac65-056912e78a79
Version FFFFFF00

**SMDFlea** · 03-23-2025, 01:45 PM

Originally posted by 247it

Thanks,

Main firmware R1SET59W(1.30)
PD Hardware ID = 677ee0c5-bedd-4116-ac65-056912e78a79
Version FFFFFF00

I don`t think the version number should be that.. . Your dump is version 1.0.0.1 ,it has two firmwares in it sequentially. The second one has a few bytes that are different to the first. Why it has two and not one i don`t really know, i`m not sure if it`s supposed to be like that, if there should be only one or it`s corrupted.

Attached is new firmware for you to try, copied from the PD update and edited into your dump

Attached Files

try1.zip (5.8 KB, 27 views)

**247it** · 03-23-2025, 03:02 PM

SMDFlea you are an absolute genius! I would love to know how you figured that out,

LEGEND!

**SMDFlea** · 03-24-2025, 07:57 AM

Originally posted by 247it

SMDFlea you are an absolute genius! I would love to know how you figured that out,

LEGEND!

It was a lucky guess

**247it** · 03-24-2025, 08:16 AM

Still a Legend

should i put a link to the solution in the hardware troubleshooting post i have open? Noob here so not sure

**SMDFlea** · 03-24-2025, 09:03 AM

Originally posted by 247it

Still a Legend

should i put a link to the solution in the hardware troubleshooting post i have open? Noob here so not sure

Yes you can do, and i`ll edit [SOLVED] into the thread title

**mcplslg123** · 03-24-2025, 11:00 PM

Yes, when it comes to bios, SMDFlea is a legend. Earlier days,@alaborbe helped a lot of members with bios issues.

**trepachka** · 05-04-2025, 09:24 PM

I am having the same issue with a ThinkPad E15 Gen 4. Computer runs off battery but not drawing any power from the port. I replaced the port to no avail.

Which chip on the motherboard are you guys referring to? A picture or component code will work? Thanks

**247it** · 05-05-2025, 02:36 AM

Hi trepachka, if your power supply is switching to 20v and measuring 0 amps current draw, it sounds like one of the mosfets that sit very close TPS65994 has become unsoldered due to excessive heat, I am no expert here but what i have learnt is the TPS65994 does not supply sufficient voltage to the gates of these mosfets (26 to 28 volts to ground) the mosfets do not fully conduct, become a virtual resistor and desolder themselves,
i'm not sure if the TPS can be fixed with firmware or if the boost converter contained within the TPS defective, on the board view for NM-E211 Rev 1.0 the controller chip is UB7 mosfets are QB5 and QB6 and the eeprom is UB9

hope this helps

**trepachka** · 05-05-2025, 10:24 AM

Computer is drawing 5V 0A. Yes, I was referring to UB9. I will also transfer UB4 for good measure from a donor board. I will let you know what happens.

ThinkPad E15 G4 PD Controller TPS65994AE EEPROM

ThinkPad E15 G4 PD Controller TPS65994AE EEPROM

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