iphone 8
Activation locked iphone 8. Booted fine to the activation locked screen. Disassembled and removed the motherboard, desoldered shields on the CPU side. A component dropped off(see highlighted IC in attachment). I've desoldered many many shields on iphone 7, 7 pluses with no issue - this is my first iphone 8.
DCPS - 3.8v Max current draw set to 3A.
Connect up the motherbaord and screen only
Screen does not come on
Immediate current draw of 1.25A fluctuates down to 900mA - 790 mA DCPS - Volts Do NOT drop but remain at 3.8V.
PTB USB immediate current draw 330mA
Screen does not come on
Not recognised by computer/3U Tools.
If there were a short on VDD_MAIN I would expect the voltage on DCPS to drop? The screen does not come on but I think this is a secondary issue. I don't think that a screen issue would stop the phone from completing its boot sequence.
Can't glean any clues from a visual inspection.
Applied freeze spray down the bottom of the board. Connect to DCPS Tigris gets hot immediately as do the components in the same area as Tigris on the opposite side of the board.
Activation locked iphone 8. Booted fine to the activation locked screen. Disassembled and removed the motherboard, desoldered shields on the CPU side. A component dropped off(see highlighted IC in attachment). I've desoldered many many shields on iphone 7, 7 pluses with no issue - this is my first iphone 8.
DCPS - 3.8v Max current draw set to 3A.
Connect up the motherbaord and screen only
Screen does not come on
Immediate current draw of 1.25A fluctuates down to 900mA - 790 mA DCPS - Volts Do NOT drop but remain at 3.8V.
PTB USB immediate current draw 330mA
Screen does not come on
Not recognised by computer/3U Tools.
If there were a short on VDD_MAIN I would expect the voltage on DCPS to drop? The screen does not come on but I think this is a secondary issue. I don't think that a screen issue would stop the phone from completing its boot sequence.
Can't glean any clues from a visual inspection.
Applied freeze spray down the bottom of the board. Connect to DCPS Tigris gets hot immediately as do the components in the same area as Tigris on the opposite side of the board.
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