The Samsung Galaxy S4, model i9505, features a 13-megapixel rear camera, and a 5-inch 1080p display.

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Refuses to turn on even with full battery

1) power button does not turn phone one

2) Plugging charging cord into phone starts boot up process but quickly turns off and reboots(repeats infinite)

3) Holding the volume up or down while plugging the phone in puts the phone is download mode/odin mode

4) Pushing/holding the power button has no effect on device

samsung refused to warrantly the phone due to a thermal crack in the screen that they faulted to damage.

I can get it into download mode and have tried flashing a new clean stock rom. Does this sound like a motherboard problem or a charging board assembly?

I found this part: http://www.etradesupply.com/oem-samsung-...

but cannot find a place to buy the motherboard for my S4 I545 (verizon).

What options do I have to repair this(other than the $70 replacement fee samsung wants to charge)?

Thanks guys.

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Have you tryed a new battery from a known working s4?

da

yea, I own 2 spare batteries that have their own charger and they are fully charged. also tried a friends battery and still no luck.

da

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The battery can't transfer power to your S4.

It seems that the contact for battery on motherboard is broken or the charging ic on the motherboard is broken.

You can boot up your phone when you plug a cable. It means that the charging port flex cable is in good condition.

There is not a new original motherboard sold on the market. If you want to get a motherboard, you can buy a second-hand in the flea market.

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if the phone can be entered in hard reset mode try to install from sd card the bootloader file unziped.

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Xander Luciano sarà eternamente grato.
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