Is this long screw damage? Seems brain dead
Hello all,
So I received an iP 6plus the other day. Client brought it in for screen issues to another shop.
It was powering on before he brough it to them, and after it was dead.
I spotted long screw damage - Excavated a bit but all the traces where I was expecting a break look good. What do you all think from these picture?
Other than that - Looks like it had touch disease - Probably the screen issues he was having. Has a piece of rubber stuff stuck onto the chips to apply pressure and flux everywhere. I haven't poked around there yet to see if anything is off.
Looks like with my usb ampmeter - its pulling 0.9 then jumps between 0 and .9 over and over again during boot. No image on screen.
What do you all think?
*Update - original photo*
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7 Комментариев
did you plug it in to a bench supply to see if its drawing any amps before prompting to boot
из daniel
Have you tried plugging it into a computer to see if it's detecting it ?. If it's jumping around like that I'd check the lines that run under the screw hole for shorts / breaks using diode mode.
из crea
@daniel , I am waiting for my squid still... I think today it should be here so I can do that!
@contact, no detection on the computer. Jumping around being more .9-0-.9-0 with the battery in - without battery, I get nothing when prompting to boot. I did check a few of the lines, my probes are kinda big, and I'm afraid if i sharpen them, ill tear a trace just trying to get on it.
I have a feeling that there is no long screw damage here. If anything, the top grounding plane was shorting to a line, but that has been removed. Yesterday, I took a quick peek at the backside of the board - and what a fun mess.... Can a touch IC issue cause no boot? (issue being bad contact - not a short)
из Joseph Hughes
did you try it with a different battery and screen. sure let us know the outcome with the bench supply
из daniel
OK! Better late than never? @daniel So I finally got my power squid... Had to touch it up a bit as it was super cheap...
I am confirming power on VCC_Main and also - the power button is getting its proper voltage.
When hooked up to a bench, there is 0 current draw. After prompting to boot with power button - still nothing (below 0.00A if any) No warm spots obviously.
Just posted to boot by plugging in the lc. and what do you know... Meson is getting burring hot. Not much of a surprise there. Time to run me a M1 jumper and slap a new Meson on.
из Joseph Hughes
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