Sounds like you have already done everything I did except for change the EC chip itself from an identical motherboard.
When I fixed mine, I flashed newest BIOS, replaced BIOS EEPROM, replaced ITE EC chip, and replaced the RAM module.
I don't know if it was only replacing the RAM module that fixed it or a combination of several things I did, but since you've done everything else, try changing the EC from an identical scrap motherboard....
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Nothing underneath the board, just some caps and a few resistors and an IC or two, but here is a pic....
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I believe this is the region you are asking for?...
Last edited by grimacelord; 05-24-2024, 01:46 PM.
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Thanks for the reply, mon2!
This board is smaller in size, so they are using components that I am not accustomed to working with. I think I know which mosfets you want me to take measurements of, but could you look at these pictures and just verify which ones you want me to measure so I don't measure the wrong ones and waste your time? Thanks.
Also, the battery charger IC is [B]BQ728[/B]Thanks for the reply, mon2!
This board is smaller in size, so they are using components that I am not accustomed to working with. I think I know which mosfets you want me...
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My ideas so far is to try and find a comparable schematic since I couldn't find an exact one for this model and study the RTC circuit and look there since the computer will only turn on after being shutdown if the battery is removed and then reinserted, which functions as a CMOS reset. I don't know if I am wasting my time or not, but maybe someone else has some other ideas?
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HP 14-dq0055dx - No Power After Shutdown - Must Reseat Internal Battery First, Then Powers On Normally.
Hello again,
I am [I]once again[/I] working on this same laptop that I was working on in [URL="https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/bios-requests-only/3262622-hp-14-dq0055dx-bios-problem-pending-image-being-cleared-loop"]this thread[/URL]. I was able to fix all of the problems that it had, but now it has one final problem. The computer will turn on and work completely fine until you shut it down. Once the computer has been shut down, it will not turn on again, nor will it...
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Derp. Nevermind. After actually writing all of the identification numbers to the BIOS using BCU tool, I suppose the UUID was generated because it is now listed correctly and everything is working fine.
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Trying To Find UUID In BIOS Dump - HP 14-dq0055dx
This laptop is the same laptop I was working on [URL="https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/bios-requests-only/3262622-hp-14-dq0055dx-bios-problem-pending-image-being-cleared-loop"]in this thread[/URL] and I wasn't sure if I should post a new topic or post in that thread because I already solved the issue that thread was discussing and this is a completely different issue although it is dealing with the same laptop. I decided to make a new thread since it's a new issue, but please move...
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Thank you!
I do not have a dedicated EC programmer because I rarely need to program. I have Raspberry pi 3, XGemu Pro T48, CH341A, and a teensy. Can I use any of these to build my own EC programmer? I remember one time I ran jumper wires from the keyboard connector to the EC and flashed but I don't remember how I did it. That was years ago and has been the only time I have ever needed to flash the EC which is why I haven't bought an expensive programmer yet because I might need it once every 7 years....
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Tried [I]every[/I] BIOS version from HP's website that contained an[B] 0864D[/B] BIOS image. All produced the same loop or black screen/no LEDs. I even changed the BIOS chip itself with no effect.
Interestingly, when I open the original dump (or at least, the dump I took when it came to me as someone else tried to flash this before) in a hex editor and search for "0864", I find an entry that reads:
The strange thing is, I cannot find a [B]version F.26[/B] for this model on HP's website. HP's website has the following:
F.08, F.21, F.33,...
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Anyone have any ideas? I've flashed this BIOS chip with both BIOS images from the extracted .EXE and neither one of them fixes the problem. One BIOS image causes the computer to be completely unresponsive and the other has no effect at all. Could the BIOS chip itself be defective? I'm trying to understand what is happening here. If I'm erasing the BIOS chip and then flashing it with a new BIOS image, but the computer is still stuck on a looping "Clearing Pending Image" message, it seems to me like the BIOS chip itself could be faulty or another component on the board entirely such as...
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Hey! Thanks for the help mon2! I went ahead and replaced AON32314 with AON7430 because it's what I had on hand and their specs are so close (but Drain-Source and Gate-Source Voltage are identical with same pinout) and sure enough, it fixed it. Board powers on and charges battery normally now. Awesome!
Thank you so much. Marked your comment as answer.
Should I purchase a new AON32314 or should I be ok with leaving AON7430 on?
Thanks again!...
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This mosfet is AONR32314.
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"32314.png","data-attachmentid":3262773}[/ATTACH]
Datasheet: [URL]https://www.aosmd.com/res/datasheets/AONR32314.pdf[/URL]
Here is one I have on hand AON7430:
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"7430.png","data-attachmentid":3262774}[/ATTACH]
...Last edited by grimacelord; 04-30-2024, 01:46 PM.
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