dead tecno w3
dead tecno w3
(23-06-2019, 08:41 AM)cosmos Hi, i hv'e a dead w3 which detect the mtk chip when pluge into a computer but cant flash and what i found out on the main pcb was that, the right distribution of power on all the chips was ok that is, the nand, cpu,memory etc.. was all ok with correct voltages BUT, that is only after pressing the power bottom and when release the power bottom, all voltages vanish quickly.Please is this a software problem or software related to hardware problem. Is been giving me sleepless night becourse i have been facing this kind of issues on so many kind of mtk , spreadtrum qualcomm chipset smart phones. please is there any help.
(24-06-2019, 02:26 AM)cosmos it got dead 1 week after replacing a broken tourch and screen for a costomer
(26-06-2019, 01:50 AM)cosmos the owner said after the replacement of the screen,he has never enjoy the good fountions of the phone on till then. Also after all this i manage to bring it back to life by pressing the power botton for a little longer but still went off after one hour later when i remove the battry and trying to on it again.
some voltages around the cpu like 1.2v, 0.9v, 1.8v for reset and all the TX, RX good.
sdram=ok
dram=ok
general voltage for the nand=2.8 to 3volt ok
BUT THIS ONLY HAPPEN WHEN THE POWER BOTTON IS SHORTED TO GROUND TO SEND SOME CURRENT TO THE DIVICE TO ON, AND AFTER I RELEASE THE BOTTON , ALL THE ACTIVE VOLTAGES GOES OFF INSTEAD OF HOLDING INTO IT POISSION FOR BOOTING.
(27-06-2019, 10:00 PM)cosmos how do i take part of the online classes