NM-C511 not posting after BIOS update

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  • questore
    Badcaps Veteran
    • Dec 2015
    • 453
    • csongrád

    #1

    NM-C511 not posting after BIOS update

    Hi everyone,
    Someone come to me after his lenovo has made a BIOS update and after never posting.
    Board is:
    NM-C511 rev 1.0
    ideapad_s145-15api (Type 81UT)
    S/N: PF1WZ2L8​

    After full removing AC and battery and cmos battery and pressing power button for 30sec the laptop turns on and every LED and power rail comes fine,
    CPU is very mildly warming up but reaction to buttons and no display.
    Tryed to reflash bios suggested on this forum but nothing changed.
    Tryed to reprogram the EC with vertyanov programmer but the following happens.
    If I plug in original charger, then the EC programming softver shows : "wrong EC ID" (ID: FFFF)
    If i plug in a LAb power adapter with no middle pin then EC gets a valid ID for a second then if again never communicates foth EC ID FFFF
    What could be the problem? Is it the EC?
  • m1ch43lzm
    Badcaps Veteran
    • Mar 2019
    • 258
    • Peru

    #2
    Hi, did you try with different BIOS?

    https://www.badcaps.net/forum/troubl...10#post3577810

    Try the BIOS from post #10
    Are you using a clip? Or desoldering the bios? Sometimes when using a clip you may get errors when programming/verifying depending on cable length

    After first power on, you should wait around 2-3 minutes to get an image
    Also try without RAM installed, if it has onboard ram)

    Schematics / board view : https://www.badcaps.net/forum/troubl...view-schematic

    Comment

    • mcplslg123
      Badcaps Legend
      • Jun 2015
      • 7262
      • india

      #3
      AFAIK, this mb dont use AD_ID. So it should show same behaviour in dc supply and adapter.

      Comment

      • questore
        Badcaps Veteran
        • Dec 2015
        • 453
        • csongrád

        #4
        Originally posted by mcplslg123
        AFAIK, this mb dont use AD_ID. So it should show same behaviour in dc supply and adapter.
        Correct, but it acts differently, nevertheless EC cannot be read somehow.

        Comment

        • questore
          Badcaps Veteran
          • Dec 2015
          • 453
          • csongrád

          #5
          Originally posted by m1ch43lzm
          Hi, did you try with different BIOS?

          https://www.badcaps.net/forum/troubl...10#post3577810

          Try the BIOS from post #10
          Are you using a clip? Or desoldering the bios? Sometimes when using a clip you may get errors when programming/verifying depending on cable length

          After first power on, you should wait around 2-3 minutes to get an image
          Also try without RAM installed, if it has onboard ram)

          Schematics / board view : https://www.badcaps.net/forum/troubl...view-schematic
          Thanks you for the típus.
          Im using clip, but verifilying always after write. Never has any problem with clips.
          I Will try to wait 2 minutes after flash but since power consumpson stays exactly 0.620 I have stopper. Alsó tryed with onboard rám only but same

          Comment

          • SMDFlea
            Super Moderator
            • Jan 2018
            • 20339
            • UK

            #6
            Originally posted by questore
            Tryed to reprogram the EC with vertyanov programmer but the following happens.
            If I plug in original charger, then the EC programming softver shows : "wrong EC ID" (ID: FFFF)
            Use the original charger, press the power button once, then connect the programmer.
            All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

            Comment

            • questore
              Badcaps Veteran
              • Dec 2015
              • 453
              • csongrád

              #7
              Originally posted by SMDFlea

              Use the original charger, press the power button once, then connect the programmer.
              No change.
              Still very stange that two original charger is saying EC ID is wrong when connecting and power supply with the same connector is answering at first correctly.
              Of course i have checked the power voltage and the two chargers connector is good.

              Also what I have noticed that when I plug any charger the BIOS pin 8 has 1.8V even when the laptop is off.
              could this mean that the EC firmware is corrupted?
              Last edited by questore; 05-04-2025, 10:59 AM.

              Comment

              • mcplslg123
                Badcaps Legend
                • Jun 2015
                • 7262
                • india

                #8
                Very likely yes.

                Comment

                • questore
                  Badcaps Veteran
                  • Dec 2015
                  • 453
                  • csongrád

                  #9
                  I just had a very strange matrix feeling.
                  A NM-D711 come to me with a very very similar problem. its EC only answers once when I plug it in and never more. it also has BIOS 3.3v on pin #8 even when it is not turned on.
                  If I order a new IC what are the chance that I will be able to programm it if its empty?

                  Comment

                  • m1ch43lzm
                    Badcaps Veteran
                    • Mar 2019
                    • 258
                    • Peru

                    #10
                    Also what I have noticed that when I plug any charger the BIOS pin 8 has 1.8V even when the laptop is off.
                    This looks normal according to the schematics, on your board BIOS chip is powered from +1.8VALW, that is, always on, see attached picture from page 3 of the schematics
                    The EC is powered from both +3VALW and +3VS (S0, aka power on), maybe you need both enabled to program EC?

                    My guess it's a timing issue when programming EC, maybe you can try in this order:
                    I don't have an EC programmer, but maybe this helps
                    1. With board unplugged from AC adapter, connect your programmer, make sure GND from your programmer is properly connected to target board
                    2. Select motherboard, EC type, etc. in your software
                    3. Press read button on the software
                    4. plug in AC adapter
                    5. Press power button once (maybe it also works with "Novo" button)?

                    If successful, repeat the above steps to write EC firmware

                    Or, from post #9 on here: https://www.badcaps.net/forum/troubl...66#post1585966
                    Originally posted by fauzanmint
                    Re: Question about replacing IT8586e IO .

                    are you using vertyanov? there is one way for this programmer to read kbc (ite) properly. just plug in the mainboard immediately after clicking the check connection button.


                    The other way is if you desolder the EC and program it externally

                    its EC only answers once when I plug it in and never more. it also has BIOS 3.3v on pin #8 even when it is not turned on.
                    If I order a new IC what are the chance that I will be able to programm it if its empty?
                    See above, the BIOS likely is also powered from an always on 3.3v line

                    A new/blank EC, likely you can program fine, or program externally before soldering to the motherboard

                    I also saw another post of yours when you mentioned electrical interference, maybe you can try installing your programmer in another PC? (preferably a laptop running on battery power, to rule out a possible grounding issue) Sometimes those electrical faults cause random issues
                    Attached Files

                    Comment

                    • mcplslg123
                      Badcaps Legend
                      • Jun 2015
                      • 7262
                      • india

                      #11
                      Most of the lenovo mb's will program ITE ec on 1st boot on its own as long as EC is blank.

                      Comment

                      • questore
                        Badcaps Veteran
                        • Dec 2015
                        • 453
                        • csongrád

                        #12
                        Originally posted by mcplslg123
                        Most of the lenovo mb's will program ITE ec on 1st boot on its own as long as EC is blank.
                        Thanks, in the end case I will try it.

                        Comment

                        • questore
                          Badcaps Veteran
                          • Dec 2015
                          • 453
                          • csongrád

                          #13
                          Originally posted by m1ch43lzm
                          This looks normal according to the schematics, on your board BIOS chip is powered from +1.8VALW, that is, always on, see attached picture from page 3 of the schematics
                          The EC is powered from both +3VALW and +3VS (S0, aka power on), maybe you need both enabled to program EC?

                          My guess it's a timing issue when programming EC, maybe you can try in this order:
                          I don't have an EC programmer, but maybe this helps
                          1. With board unplugged from AC adapter, connect your programmer, make sure GND from your programmer is properly connected to target board
                          2. Select motherboard, EC type, etc. in your software
                          3. Press read button on the software
                          4. plug in AC adapter
                          5. Press power button once (maybe it also works with "Novo" button)?

                          If successful, repeat the above steps to write EC firmware

                          Or, from post #9 on here: https://www.badcaps.net/forum/troubl...66#post1585966


                          The other way is if you desolder the EC and program it externally


                          See above, the BIOS likely is also powered from an always on 3.3v line

                          A new/blank EC, likely you can program fine, or program externally before soldering to the motherboard

                          I also saw another post of yours when you mentioned electrical interference, maybe you can try installing your programmer in another PC? (preferably a laptop running on battery power, to rule out a possible grounding issue) Sometimes those electrical faults cause random issues
                          Hmmm might be a good idea to not check the connection but to directly read the EC at first time.
                          Number 5 on the list is not an option in here since power button is in the keyboard and I'm using keyboard connector to flash but on other modells might be good idea thank you.

                          Comment

                          • questore
                            Badcaps Veteran
                            • Dec 2015
                            • 453
                            • csongrád

                            #14
                            Originally posted by m1ch43lzm
                            This looks normal according to the schematics, on your board BIOS chip is powered from +1.8VALW, that is, always on, see attached picture from page 3 of the schematics
                            The EC is powered from both +3VALW and +3VS (S0, aka power on), maybe you need both enabled to program EC?

                            My guess it's a timing issue when programming EC, maybe you can try in this order:
                            I don't have an EC programmer, but maybe this helps
                            1. With board unplugged from AC adapter, connect your programmer, make sure GND from your programmer is properly connected to target board
                            2. Select motherboard, EC type, etc. in your software
                            3. Press read button on the software
                            4. plug in AC adapter
                            5. Press power button once (maybe it also works with "Novo" button)?

                            If successful, repeat the above steps to write EC firmware

                            Or, from post #9 on here: https://www.badcaps.net/forum/troubl...66#post1585966


                            The other way is if you desolder the EC and program it externally


                            See above, the BIOS likely is also powered from an always on 3.3v line

                            A new/blank EC, likely you can program fine, or program externally before soldering to the motherboard

                            I also saw another post of yours when you mentioned electrical interference, maybe you can try installing your programmer in another PC? (preferably a laptop running on battery power, to rule out a possible grounding issue) Sometimes those electrical faults cause random issues
                            Tryed your suggestion to read right the first time when pluggin charger and the reading progress bar was very slow but gone till the end, the full reading was empty "FF"
                            Either something was erased the EC and it cannot be reprogrammed anymore or it is dead.
                            Also tryed to write with the sam method but since it erases before write, it never got to writing since after erase it lost contact.
                            Also strange that whenever i got a EC ID that seems corrupt: 8CFF rev -> FF

                            I think it time to order a new EC
                            Last edited by questore; 05-07-2025, 07:32 AM.

                            Comment

                            • questore
                              Badcaps Veteran
                              • Dec 2015
                              • 453
                              • csongrád

                              #15
                              New EC arrived.
                              Replaced and before fist try I have tryed to read EC with vertyanov. "Wrong EC ID"
                              Then I have installed a new BIOS tested by users "nmc511BUCN33WW OK"
                              Laptop starts as soon as I plug in the charger. There is fanspin and caps lock is instantly on but no POST and not reacting to Power button at all.
                              taking 400mA and then swithes down to 270 and stays there.
                              Every 20 second I hear a click.

                              I have found that BIOS pin #8 has only 1.0V (+1.8VALW) hmmm why so low when nothing getting significantly hot on the board??
                              Last edited by questore; Yesterday, 04:03 AM.

                              Comment

                              • questore
                                Badcaps Veteran
                                • Dec 2015
                                • 453
                                • csongrád

                                #16
                                +1.8VALW has 9kohm resistance to ground
                                Applying 1.8V from LAB PSU taking 0.004 Amps so no real high power consumpton on there.

                                is my LDO 1.8 PU1901 generator failed, or should i suspect something else and remove PJ1906 to see if 1.8 is there on the beginning?

                                Comment

                                • Sephir0th
                                  Badcaps Legend
                                  • Oct 2020
                                  • 1260
                                  • Germany

                                  #17
                                  What about the +1.8VS ?
                                  FairRepair on YouTube

                                  Comment

                                  • m1ch43lzm
                                    Badcaps Veteran
                                    • Mar 2019
                                    • 258
                                    • Peru

                                    #18
                                    Originally posted by questore
                                    +1.8VALW has 9kohm resistance to ground
                                    Applying 1.8V from LAB PSU taking 0.004 Amps so no real high power consumpton on there.

                                    is my LDO 1.8 PU1901 generator failed, or should i suspect something else and remove PJ1906 to see if 1.8 is there on the beginning?
                                    PU1901 is a custom "Lenovo" LV5028 PMIC that does several voltages in one chip, it does the voltages for DDR4 (1.2V, 2.5V, 0.6V) and 1.8VALW, 0.9VS, 0.9VALW
                                    PJ1906 is actually the input to the internal 0.9V LDO, so this chip creates the +1.8VALW, then feeds it back to itself (via PJ1906) to create the +0.9VALW LDO out, at PJ1907
                                    The actual +1.8VALW out is at PJ1904, pin 8 of the BIOS should have continuity to PJ1904

                                    Originally posted by Sephir0th
                                    What about the +1.8VS ?
                                    According to the schematics it's switched from 1.8VALW via Q39



                                    Comment

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