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  1. #11
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    Download a stock firmware(known devil) first, if you do not already have, available via this forum at different links. Format an external sdcard using Windows in FAT32. Unzip the downloaded stock firmware to your sdcard. It should have only one directory named "dload". Under dload three files named unlmt.cfg, UPDATA.APP and upg can be found. While upg is a log file and may not be necessary its presence does not harm but the cfg file should be "unlmt.cfg". Remove sdcard safely and insert it in S7. You do not need your battery to flash. Connect your charger and power on the charger. Wait for IDEOS on screen and then power on your device. The flashing should start. Watch out for fast flashing or stalling. If it does, disconnect your charger - as it will not proceed any further - and retry. If it still does not complete flashing the device apparently has not entered recovery mode and you will need adb on your PC to verify that.

    If you do have adb, connect your device to the PC and wait for few minutes before invoking adb. Assuming you have Windows, you can check if the device is recognized under Device Manager. It will be listed as an Android device. Open a command window and cd to the directory where adb is installed. Issue a command "adb devices" to check if your device is seen by adb. If it does it will list your device probably as "1234567890ABCDEF". I do not remember the position of "0". If it does not list anything then you are in trouble. :-(. You need an expert assistance then.

    After the device is listed issue a command "adb reboot recovery" with sdcard with firmware still inserted. It will flash your device. Good Luck.

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  3. #12
    Junior Member Achievements:
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    Member #
    32081
    Join Date
    May 2011
    Location
    Philippines
    Posts
    9
    Device
    Huawei Ideos S7
    Quote Originally Posted by kaysun View Post
    1. Without battery connect charger and then power on charger. Let know if IDEOS is displayed on screen. Assuming ROM is corrupt.
    2. With or without battery but with charger connected and powered on press and hold Back and Send buttons then power up. Does the unit display a white bar in the middle?

    If any of the above symptoms is present, the unit can be rebooted in recovery via ADB and a stock firmware can be flashed. I killed my tab so many times like an over zealous modder and could recover back all the time. it did happen to me that the flashing stopped after about 5 bars and then on some other occasion at bar 12 or 13. On two occasions the lights will suddenly start blinking fast and flashing will not continue. Please let know.
    Suspecting a faulty charger, I checked the charger using a DMM, it still kicks out 5V and 2A. Assuming nothing is wrong with my S7 and charger, it should be able to power on even without the battery, right? Tried #1 and #2, unfortunately my S7 still does not power up at all. So there must be really something wrong with my S7.

    Since I had a failed reflash, my S7 now has no firmware and since I cannot power it on, I am not able to do a reflash via the SD card method. I cannot even get to bootloader mode.

    Does anyone have a schematic diagram of the S7? I am thinking if this can be reflashed via JTAG?
    Huawei Ideos S7 SV-105 (Globe Telecom)
    Android ver. 2.2.2 - Rooted
    Build No. S7V100R001C98B021

  4. #13
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    Device
    Huawei Ideos S7
    Ok, so I had my S7 plugged into the AC charger for 2 days and still does not power up. I measured the voltages to check as well if this is a hardware issue. Here are my readings:

    1. AC charger output = 5.223V, 2A
    2. Battery voltage (- to + terminals) = 2.34V
    3. Battery voltage (- to middle terminal) = 0V
    4. Battery voltage (middle terminal to +) = 2.34V
    5. S7 w/out battery but AC charger connected (- to +) = 0V
    6. S7 w/out battery but AC charger connected (- to middle terminal) = 2.85V
    7. S7 w/out battery but AC charger connected (middle terminal to +) = 2.85V

    Could anyone confirm if you get the same measurements? Any help would be appreciated.

    Also, here are some questions I would like to ask:
    1. Is it possible to wipe-out the bootloader during an unsuccessful reflash? No bootloader, can't reflash.
    2. If there is no firmware, will the S7 still power on and charge? Isn't the power management controlled by the FW?

    I am looking at JTAG as a last resort although I'm not sure if anyone has done this before.
    Last edited by lite751; 04-20-2012 at 03:04 AM.
    Huawei Ideos S7 SV-105 (Globe Telecom)
    Android ver. 2.2.2 - Rooted
    Build No. S7V100R001C98B021

  5. #14
    Junior Member Achievements:
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    Member #
    165337
    Join Date
    Jan 2013
    Location
    CHCH, NZ
    Posts
    2
    Device
    S7 Slim
    Quote Originally Posted by kaysun View Post
    Download a stock firmware(known devil) first, if you do not already have, available via this forum at different links. Format an external sdcard using Windows in FAT32. Unzip the downloaded stock firmware to your sdcard. It should have only one directory named "dload". Under dload three files named unlmt.cfg, UPDATA.APP and upg can be found. While upg is a log file and may not be necessary its presence does not harm but the cfg file should be "unlmt.cfg". Remove sdcard safely and insert it in S7. You do not need your battery to flash. Connect your charger and power on the charger. Wait for IDEOS on screen and then power on your device. The flashing should start. Watch out for fast flashing or stalling. If it does, disconnect your charger - as it will not proceed any further - and retry. If it still does not complete flashing the device apparently has not entered recovery mode and you will need adb on your PC to verify that.

    If you do have adb, connect your device to the PC and wait for few minutes before invoking adb. Assuming you have Windows, you can check if the device is recognized under Device Manager. It will be listed as an Android device. Open a command window and cd to the directory where adb is installed. Issue a command "adb devices" to check if your device is seen by adb. If it does it will list your device probably as "1234567890ABCDEF". I do not remember the position of "0". If it does not list anything then you are in trouble. :-(. You need an expert assistance then.

    After the device is listed issue a command "adb reboot recovery" with sdcard with firmware still inserted. It will flash your device. Good Luck.
    I was attempting to do just this, and it got about 1/4 the way through and then said "Update Failed, Please Try Again" I put it away until I got home again and then tried turning it on again to discover it wouldn't power up (either on mains or battery) and when put on charge it wouldn't even display the charging animation... PLEASE HELP !!!!! :S

  6. #15
    Junior Member
    Member #
    173478
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    Apr 2013
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    hi, have you solved your problem? i have a S7-105. it doesn't turn on with or without power supply. no lights. please help me if you can.
    regards.

  7. #16
    Junior Member Achievements:
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    Member #
    165337
    Join Date
    Jan 2013
    Location
    CHCH, NZ
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    Device
    S7 Slim
    Quote Originally Posted by egone01 View Post
    hi, have you solved your problem? i have a S7-105. it doesn't turn on with or without power supply. no lights. please help me if you can.
    regards.
    Hi Egone,

    Unfortunatly, No, for the time being i have had to put it down as we are packing to move house,
    im looking at the possiblity of actually having to find myself another android device as there doesnt seem to be any solution i have found

    please, if you find something that works in the meantime let us know, im sure it will be appreciated

    Cheers,
    David

  8. #17
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    Member #
    187181
    Join Date
    Dec 2013
    Location
    Sri Lanka
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    Device
    Huawei s7-104

    Hey Did you get any answer

    Quote Originally Posted by lite751 View Post
    Hi, I need your expert opinions regarding my S7. It refuses to turn on or power up either with the battery or the charger plugged after an "unsuccessful" firmware upgrade. Did I brick my tablet?

    I have already successfully upgraded from the stock 2.1 to 2.2.2 (Indo ROM) previously. Then recently, my S7 hung on the "IDEOS" logo after powering-up. Tried hard reset, recovery and fast-boot to no avail. So I eventually decided to re-flash via SD using 2.2.2 Indo ROM again. During the upgrade process, the progress bar stopped midway and my S7 reset. Tried to repeat the process with similar results, simply the upgrade failed. After that, my S7 does not turn on anymore. I tried removing the battery and plugged the AC charger but still it won't power up. I don't think this is a hardware issue and I suspect it has something to do with the failed upgrade.

    Any thoughts on how to resolve this issue? Thanks in advance!



    Hey Did you get any answer


 
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