[XDA Assist] ajit4all:
Hello XDA assist,

Mobile - Karbonn A12+ (MT6572)

Issue - mobile not powering up or lighting display at all even while connected to charger no battery charging indication. Only hope I see is when I connected without battery to computer device drivers detected which is usual for hard flashing.

Notes - Mobile had not fallen and in working condition on my desk , last time I see it on 16% battery suddenly it became off & never light up later.

Current installed ROM is complete fresh and very few apps. Earlier to day I m trying to fix or disable proximity sensor detection with few rooted apps like xposed modules etc but none worked. Later thus also I did lot of internet browsing as well before BLANK OFF.

Trials & Findings.

Long press power button for 1 min.

Shorting +- terminals of power button.

Power + volume up for boot mode.

Connected with out battery to computer for adb boot even Without power+volup its being detected after every 3 secs in windows devices as below but not lighted its display any time....

In Device Manager, it detected as follows...

>Mobistel Cynus F4 PreLoader USB VCOM Port

=== New Trials & Updates ====

I could find that it must be a HardBrick, as not lighting up but still detected in windows.

I did scatter_loading using Sp flash tool & i got download OK message.

But still i am unable to boot it or light up my screen nor battery charging.

Ran a memory test using Sp_Flash tool, below is the result.

============ Memory Detection Report ===========

Internal RAM:

Size = 0x00020000 (128KB)

External RAM:

Type = DRAM

Size = 0x20000000 (512MB/4096Mb)

NAND Flash:

ERROR: NAND Flash was not detected!

EMMC:

EMMC_PART_BOOT1 Size = 0x0000000000200000(2MB)

EMMC_PART_BOOT2 Size = 0x0000000000200000(2MB)

EMMC_PART_RPMB Size = 0x0000000000200000(2MB)

EMMC_PART_GP1 Size = 0x0000000000000000(0MB)

EMMC_PART_GP2 Size = 0x0000000000000000(0MB)

EMMC_PART_GP3 Size = 0x0000000000000000(0MB)

EMMC_PART_GP4 Size = 0x0000000000000000(0MB)

EMMC_PART_USER Size = 0x00000000e7000000(3696MB)

UFS:

ERROR: UFS was not detected!

============ RAM Test ============

Data Bus Test:

[D0][D1][D2][D3][D4][D5][D6][D7][D8][D9][D10][D11][D12][D13][D14][D15][D16][D17][D18][D19][D20][D21][D22][D23][D24][D25][D26][D27][D28][D29][D30][D31]

OK!!

Address Bus Test:

[A1][A2][A3][A4][A5][A6][A7][A8][A9][A10][A11][A12][A13][A14][A15][A16][A17][A18][A19][A20][A21][A22][A23][A24][A25][A26][A27][A28]

OK!!

RAM Pattern Test :

Writing ...

0x44332211,

0xA5A5A5A5,

0xA5A5A500,

0xA500A500,

0xA5000000,

0x00000000,

0xFFFF0000,

0xFFFFFFFF,

OK!!

Increment/Decrement Test:

Writing...

OK!!

============ EMMC Test ============

EMMC Pattern Test(0x5A5A):

(0x00600800),(0x00601000),(0x00601800),(0x00602000),(0x00602800),(0x00603000),(0x00603800),(0x00604000),(0x00604800),(0x00605000),(0x00605800),(0x00606000),(0x0066800),(0x00607000),(0x00607800),(0x00608000),(0x00608800),(0x00609000),(0x00609800),(0x0060A000),(0x0060A800),(0x0060B000),(0x0060B800),(0x0060C000),(0x0060C800),(x0060D000),(0x0060D800),(0x0060E000),(0x0060E800),(0x0060F000),(0x0060F800),(0x00610000),(0x00610800),(0x00611000),(0x00611800),(0x00612000),(0x00612800),(0x0061300),(0x00613800),(0x00614000),(0x00614800),(0x00615000),(0x00615800),(0x00616000),(0x00616800),(0x00617000),(0x00617800),(0x00618000),(0x00618800),.............................

Continues...........Continues ...........Continues ...........Continues ...........Continues ...........Continues ...........Continues ...........Continues ...........Continues ...........

................................(0xC432C000),(0xC432C800),(0xC432D000),(0xC432D800),(0xC432E000),(0xC432E800),(0xC432F000),(0xC432F800),(0xC4330000),(0xC4330800),(0xC4331000),(0xC4331800),(0xC4332000),(0xC4332800),(0xC4333000),(0xC4333800),(0xC4334000),(0xC4334800),(0xC4335000),(0xC4335800),(0xC4336000),(0xC4336800),(0xC4337000),(0xC4337800),(0xC4338000),(0xC4338800),(0xC4339000),(0xC4339800),(0xC433A000),(0xC433A800),(0xC433B000),(0xC433B800),(0xC433C000),

FAILED!!

============ Memory Detection Report ===========

##########################

Please light up my device...

Thanks in advance...

Happy to hear any kind of opinions...

##########################