more likely to be the Main / Battery switch the TriStar if the device will not come on. with the 6 though it can be the tigris charging ic. the percentage is controlled by a gas gauge in the battery connector to a line in the cpu so battery percentage can only be battery / battery ways / cpu it is possible a damaged filter bead on the sensor circuit can be responsible as can a bad battery.
as the Audio is working The Audio Codec is good. as you have changed the dock flex then there is a board fault. to be specific the Audio Amplifier circuit. the Audio Amp is a simple repair if you have the tools and knowledge. failing that a tech can test and fix this easy
Hi Eddie from the issues you explain and a bent device then most certainly you have a broken connection between the transceiver ic and the modem. if you have 2g,3g.4g the power amplifiers will not be the fault. if you have 2g,3g.4g then the antenna switches will be good. the rf circuit is complex but most issues arise from the transceiver and modem. you can try what many others have tried and heat the board although i would use caution with any lipo battery and intensive heat as the polymer becomes more unstable with heat. the true solution would be to have the modem re-balled to ensure a good connection followed by replacing the transceiver if the re-ball did not solve it
Hi Jo. This happens as when upgrading or reflashing the firmware the WiFi address is not written to the Nand. During restore. You can try downgrading 1st to see if that may solve the issue. If not then the data signal from the Wifi chip to the nand is damaged more than likely through a knock. More often than not though you have to replace the WiFi chip to recover the data signals and pair the WiFi for it to function again
no imei can be three things. this is a hardware issue. 1st it can be the modem failing to communicate with the baseband memory chip (eeprom) 2nd it can be the baseband memory chip (eeprom) and 3rd it can be baseband pmu power chip. goto settings / about / and look if you have modem firmware. no firmware usually is the baseband power chip. iTunes error codes will confirm this but will brick the phone in recovery mode. you will need to take it to a specialist for repair if you have had no luck with Apple Update (01/19/2017): Andrew you need to first test the DC-DC convertor Qpoet Voltages to the power amplifiers. low band mid band and high band power supplies come from here as all amps are connected via the Qpoet if one fails they all fail test for shorts in caps around Qpoet then test the voltages to caps during restore via 3utools after 20% as all base band signals will be active at the 20% and above firmware flash. if no shorts are in the amplifier power supplies then go to the antenna switches and test...
No they are Variants. the sim contact points on the boards are a different widths. if you have no other option it is possible to botch a connection but far better to replace any part like for like. sim tray faults only occur from customer damage or corrosion. if the sim is not registering it is most likely a modem issue.
i think you have damaged the FTP ribbon. i have seen this so many times. the ribbon has perforations at the top of the flex on the lcd part. check the perforations for breaks where it leaves the back of the lcd metal shield. good part is you can fit a replacement ribbon just not the actual button