Originally Posted by crackgm
I have Jiayu G3S MT6589 and phone was working perfect, I was keeping it in my pocket and yesterday i took the phone off the pocket and i couldn't boot it. I can't charge it either. I tried to put other battery in my phone and it still didn't boot up. But when i connect it by USB i can see that its MTK USB Port, or MTK DA port or something like this (that's after installing drivers, before I installed it i was getting Unknown Device on the list - it shold be MT65xx Preloader) So i tried to flash a stock rom (SP flash tool), but i can't do it too - I'm getting error connected with DRAM, or the red bar is loading like 100% and then nothing..I can wait and wait and nothing more...
I didn't broke my phone like it was never on the floor or something like that and I didn't change Preloader by SP Flash Tools
It's very important to me to fix it fast because I'm working on dual sim and I need smartphone... I don't want to send it back to China - it would take at least 2 months to complete repair, so I'm determinated to do it on my own, but I need your help...
Remove the battery, and keep the phone WITHOUT the battery for >2 hours
Re-insert the battery and charge the phone (check if its charging) either by the led (in case it haves one), or by the off-line charge animation
If its charging GOOD , continue to the next step, if its not, im affraid its really bricked (if the phone doesnt display the off-line charge animation its in most mtk devices an hard brick)
If the phone charges ok, then re-flash ALL the nand via SPFlashTools (including the pre-loader) keep in mind to flash the right spflashtools rom version
And of course you need to have the Mediatek drivers installed for this to work, if your using windows8 , you may have some drivers problems, since the mediatek drivers have issues with this windows version, so just use windows 7 or xp.
For the drivers download this ones:
This are Universal Mediatek drivers...