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Support LG GT 540 Optimus Attempt to downgrade android failed

Discussion in 'Android Devices' started by trubilo, Jan 1, 2011.

  1. trubilo

    trubilo New Member
    Thread Starter

    Dec 23, 2010
    I tried to downgrade LG GT540 Android 2.1 to 1.6 due to slow running reasons.
    File I used to upgrade from 1.6 (few weeks ago) to 2.1 - V20A_00.kdz
    File I used to downgrade from 2.1 (today) to 1.6 - V10A_00.kdz after fail V10C_00.kdz
    With Software Update [KDZ] LG Electronics 1.st attempt to downgrade to 1.6 frost my computer, after half an hour I decided to restart computer & phone which was in Download Mode. Computer booted normally, Phone was stuck on LG loading screen.
    I tried to re-install 2.1 Android but nothing. I saw few threads on forums that were having the same problem.
    I tried to "Hard Reset" the phone holding Search + Volume UP + Home buttons. -Nothing
    I tried to "Fast Boot" the phone holding Camera Capture + Power On Buttons. -Nothing
    I tried to boot phone with "Download Mode" (It is download mode because its 2.1 Android insted of 1.6 Android which uses blue screen and Emergency Mode). -It loaded Download mode successfully. Then I attempted to use some update, but none of them
    seem to be working. When I boot my phone in Download Mode, then I plug it into computer, my computer detects phone (not the SD Card), I hear the sound as it detects the phone. It is whole time detected by the computer until i try to update it.
    What happens:
    When I try to update it - Type 3GQCT PhoneMode (switching between) EMERGENCY, CS_EMERGENCY and DIAG.

    21:26:56 : Launching SW update
    21:26:56 : Unpacking KDZ
    21:26:57 : KDZ file extraced
    21:26:58 : Files were extracted.
    21:26:58 : LGMobileDL Load.
    21:26:58 : Port = -1
    21:26:58 : Connecting to phone
    21:26:58 : PHONE WAS NOT FOUND!
    21:27:00 : ===FINISHED===

    Between Unpacking KDZ and KDZ file extracted I hear the unplugging sound of the phone. I tried the same thing without SIM, Battery and SD Card and combinating them. While Combinating mods, and PhoneMode.

    Please support me, I'll be thankful.


  2. Djolle

    Djolle Well-Known Member

    Feb 25, 2010
    Computer technician
    Subotica, Serbia

    First of all, you should click on SEARCH button in this forum... second, you cannot downgrad from 2.1 to 1.6.

    Did you try this? ;)

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