Okay so here's how to fix the modem did not power up issue
i believe the problem arises because of the loss of connection between the motherboard n modem chip ( which is in this case is Qualcomm MDM 6200 , saw it on ifixit)
this loss of connection occurs because the soldering gets improper due to overheating.
so to regain the proper connection we r again going to heat the connection to melt them so the join again in proper way n let it cool down without disturbing the position so they again solidify in proper way.
IF YOU DAMAGE YOUR PHONE I WONT BE RESPONSIBLE
THIS WORK HAS TO BE DONE CAREFULLY AND BY EXPERTS
I Have Made A Video Tutorial search on youtube [(SOLUTION) atrix 4g"Modem did not power up (0) starting rsd protocol"]
Things you will need
1- Opening tools
2- Heat gun
3- Aluminium foil
4- Skills and carefulness
STEP 1 - Remove mem card, sim card, battery
STEP 2 - Open all the screws
STEP 3 - remove the plastic cover from bottom and upside with pry tool and lift it from the side where there are camera n flash on the other side there is antenna.
STEP 4 - remove that antenna carefully on the right side and the cover will be removed completely.
STEP 5 - now you will see motherboard. THERE ARE NO SCREWS HERE AGAIN. lift it up from the side where the usb n hdmi ports are placed on the other side there are three flex cable which may get damaged if you try to lift up from that side.
STEP 6 - slightly lift up the board n remove the flex cables below it on the other side.
two flex cable are easy to remove. the third one is of a different kind and difficult to remove! be careful!
STEP 7 - remove the motherboard and remove the thin heat sink like thing on the backside of the board
STEP 8 - Cover the board with foil paper except where the Qualcomm MDM 6200 modem chip is situated ( CHECK IFIXIT)
STEP 9 - Heat the board for about 1 min or till the time you feel u have sufficiently given the heat to slightly melt the soldering points
DO THIS ON BOTH SIDE OF THE CHIP
STEP 10 - let it cool down in fixed position. after it cools down place all the parts back properly n restart your phone.
:victory:YOUR PHONE SHOULD START WITHOUT ANY ISSUE. CONGRATS!
Use "automatic unlock 4.2" if you have lost unlocked bootloader or Bricked the phone
search how to use automatic unlock 4.2 on the forum (all links are dead I will attach the zip)
i believe the problem arises because of the loss of connection between the motherboard n modem chip ( which is in this case is Qualcomm MDM 6200 , saw it on ifixit)
this loss of connection occurs because the soldering gets improper due to overheating.
so to regain the proper connection we r again going to heat the connection to melt them so the join again in proper way n let it cool down without disturbing the position so they again solidify in proper way.
IF YOU DAMAGE YOUR PHONE I WONT BE RESPONSIBLE
THIS WORK HAS TO BE DONE CAREFULLY AND BY EXPERTS
I Have Made A Video Tutorial search on youtube [(SOLUTION) atrix 4g"Modem did not power up (0) starting rsd protocol"]
Things you will need
1- Opening tools
2- Heat gun
3- Aluminium foil
4- Skills and carefulness
STEP 1 - Remove mem card, sim card, battery
STEP 2 - Open all the screws
STEP 3 - remove the plastic cover from bottom and upside with pry tool and lift it from the side where there are camera n flash on the other side there is antenna.
STEP 4 - remove that antenna carefully on the right side and the cover will be removed completely.
STEP 5 - now you will see motherboard. THERE ARE NO SCREWS HERE AGAIN. lift it up from the side where the usb n hdmi ports are placed on the other side there are three flex cable which may get damaged if you try to lift up from that side.
STEP 6 - slightly lift up the board n remove the flex cables below it on the other side.
two flex cable are easy to remove. the third one is of a different kind and difficult to remove! be careful!
STEP 7 - remove the motherboard and remove the thin heat sink like thing on the backside of the board
STEP 8 - Cover the board with foil paper except where the Qualcomm MDM 6200 modem chip is situated ( CHECK IFIXIT)
STEP 9 - Heat the board for about 1 min or till the time you feel u have sufficiently given the heat to slightly melt the soldering points
DO THIS ON BOTH SIDE OF THE CHIP
STEP 10 - let it cool down in fixed position. after it cools down place all the parts back properly n restart your phone.
:victory:YOUR PHONE SHOULD START WITHOUT ANY ISSUE. CONGRATS!
Use "automatic unlock 4.2" if you have lost unlocked bootloader or Bricked the phone
search how to use automatic unlock 4.2 on the forum (all links are dead I will attach the zip)
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