All device dead - GSM-Forum

pkbarawal · 11-07-2017, 06:51

My each device dead after checking EMMC through Easy Jtag Tool. Emmc is sucessfully connected and can read data/partition but device will not power on after that.

Please help.

vikboston · 11-07-2017, 14:53

Check phones pull-up resistors on CMD, DAT0.
They are recently broken after soldering.

Best Regards

pkbarawal · 11-08-2017, 07:06

Sir Every HTC handset does not power on after checking EMMC in Z3X Box. I am using Moorc JTAG ISP Adaptor with my Easy Jtag.

vikboston · 11-10-2017, 12:23

Hi,
Please, measure real voltages of your ISP Adapter.
Some adapters have mistake in voltage text (1.8 and 3.3 are swapped).
If you solder VCC 3.3V to VCCQ 1.8 , some Qualcomm CPU can be damaged.
In this case phone doesn't start up.
Best Regards

mobite · 11-10-2017, 13:57

u are right
AMS1117 LM1117 3.3V 1A SOT-223 Voltage Regulator if we change to 2.8 then it will work ?

many user have this wrong adaptor by moorc

11-07-2017, 06:51	#1 (permalink)
pkbarawal Freak Poster Join Date: Dec 2007 Location: Delhi.India Posts: 288 Member: 652685 Status: Offline Sonork: 100.1594842 Thanks Meter: 45	All device dead My each device dead after checking EMMC through Easy Jtag Tool. Emmc is sucessfully connected and can read data/partition but device will not power on after that. Please help.

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11-07-2017, 14:53	#2 (permalink)
vikboston Product Supporter Join Date: May 2011 Posts: 286 Member: 1569669 Status: Offline Thanks Meter: 249	Check phones pull-up resistors on CMD, DAT0. They are recently broken after soldering. Best Regards

11-08-2017, 07:06	#3 (permalink)
pkbarawal Freak Poster Join Date: Dec 2007 Location: Delhi.India Posts: 288 Member: 652685 Status: Offline Sonork: 100.1594842 Thanks Meter: 45	Sir Every HTC handset does not power on after checking EMMC in Z3X Box. I am using Moorc JTAG ISP Adaptor with my Easy Jtag.

11-10-2017, 12:23	#4 (permalink)
vikboston Product Supporter Join Date: May 2011 Posts: 286 Member: 1569669 Status: Offline Thanks Meter: 249	Hi, Please, measure real voltages of your ISP Adapter. Some adapters have mistake in voltage text (1.8 and 3.3 are swapped). If you solder VCC 3.3V to VCCQ 1.8 , some Qualcomm CPU can be damaged. In this case phone doesn't start up. Best Regards

11-10-2017, 13:57	#5 (permalink)
mobite No Life Poster Join Date: Aug 2012 Location: MUMBAI-METRO Age: 32 Posts: 1,289 Member: 1800009 Status: Offline Sonork: 100.1654307 Thanks Meter: 803	u are right AMS1117 LM1117 3.3V 1A SOT-223 Voltage Regulator if we change to 2.8 then it will work ? many user have this wrong adaptor by moorc