B.Mini Ex 2 stopped working

Shop Forums QnA B.Mini Ex 2 stopped working

This topic contains 8 replies, has 2 voices, and was last updated by  flashteker@gmail.com 1 week, 6 days ago.

Viewing 9 posts - 1 through 9 (of 9 total)
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  • #5904

    ezraG
    Participant

    Hello,

    I purchased a B.Mini Ex from you with SMD pre-soldered.  It was working fine for about three weeks, when all of a sudden it stopped working.  It was properly connected by USB, but the LEDs turned off and no key presses did anything.  I tried re-connecting it, and tried several different USB cables and different computers, but I can’t get it to work at all.  When I plug it in, I get the message from WIndows: “USB Device Not Recognized.” When I go into the devices confirguartion screen in WOndiws, I see “Unknown USB Device (Device Descriptor Request Failed) – Driver Error.” Please help! Thank you,

    Ezra

    #5905

    ezraG
    Participant

    Also, I should mention:

    I have disassembled the board, and am still getting the message even when I plug the PCB in without any switches (I had used holtites so it was easy to remove everything).

    #5923

    Hi Sorry for your inconvenience.

    Could you try to remove a driver and replug your keyboard?

    -> Remove device drive(HID drive) from OS device manager and replug the keyboard
    If you install it properly, it looks like this

    If you want to clearly remove drive, please see this page:http://winkeyless.kr/how_to_remove_driver/

    Thanks.
    Hojin.Yi

    #5931

    ezraG
    Participant

    I did what you suggested.  When I plugged it in again, the same error message came up.  I took a screenshot of what the program said about the device.  It’s the one with the blue line.  I had to take two screenshots to get all of the information.

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    #5934

    Could you try to upload the latest firmware by using the latest BootmapperClient in bootloader mode?

    1. Downloading firmware and BootmapperClient

    Firmware Installing and Setting

    2. Uploading firmware in bootloader mode
    1) Connect Keyboard as bootloader mode (While pressing LCtrl, connect it to PC)
    2) Start BootmapperClient and press “Options” tab.
    3) Press “Firm up” button at Utils area.
    4) please select a proper hex file.
    (Firmware is “ps2avrGB_NKRO.hex”, not the ones starting with “keymap_xxx”.)

    Thanks.
    Hojin.Yi

    #5938

    ezraG
    Participant

    OK! I followed your instructions. At first, it was still not working. But then I messed around a bit in Bootmapperclient. I clicked “EEPROM All Clear,” and then it worked! Everything seems to be okay now. Thanks for the help 🙂

    #5939

    ezraG
    Participant

    It ttttttttttttturns out that iiiiiiiiiiiiit is not wooooooooooooooorrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrking well

    I wrote the previous sentence with the B.mini… It is acting very strangely.  Lots of keys get “stuck,” as you can see. Once, I even got a pop-up from Windows saying that “A USB device is setting up,” as soon as the characters started repeating.

    I know it’s not a problem with the switches; these are the same ones that have been in the keyboard and were previously working just fine. Any ideas?
    Thank you.

     

     

     

     

    #5940

    ezraG
    Participant

    Oh no… I am back to the beginning:  the keyboard doesn’t work at all, and I get the “device not recognized message.”  Now when I try to upload the new firmware, it doesn’t even work.

    #5943

    Oh…

    I guess you chose “ps2” connection mode.

    In BootmapperClient, could you change it to “Set USB” and replug your keyboard?

    Thanks.
    Hojin.Yi

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