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820-2850-A Liquid Damaged With Some Heating and Low Resistance to Ground
- Thread starter rany
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rany
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I replaced it from an 820-3330. It is not the same marking on the chip, but it is the same as per the schematics...
rany
New member
I have to close shop. Will test tomorrow the charging and see if it changed after replacing Q7055.
And so the lesson is I don't have to hunt for a short to ground on PP1V05_S0 because it will normally have low resistance?
If yes, reminds me of the first time I thought I found shorted caps on the line going under the iPhone CPU.
rany
New member
OK this is becoming interesting.
Before I replaced Q7055, it was charging very slowly.
I replaced Q7055 and got "battery not charging" and no orange light, only green. 3V42 is present.
As I said before, I noticed heat next to U9600, and I noticed that if I tap U9600, fans stop from spinning (still with green light on charger), then they start again.
Should I reball or reflow? I am afraid some silicone/glue crap will go underneath it.
And should this resolve my issue of no charging?
Before I replaced Q7055, it was charging very slowly.
I replaced Q7055 and got "battery not charging" and no orange light, only green. 3V42 is present.
As I said before, I noticed heat next to U9600, and I noticed that if I tap U9600, fans stop from spinning (still with green light on charger), then they start again.
Should I reball or reflow? I am afraid some silicone/glue crap will go underneath it.
And should this resolve my issue of no charging?
U9600 has nothing to do with anything other than screen flicker/distortion. Are you sure we're looking at U9600 here?
rany
New member
- Charging normally, this is solved.
- Wasted time on U9600 but I'd like to think I may have saved it from near future failure since the pads were oxidized.
- Still some heat near U9600 and poking there still restarts laptop! Otherwise working normally.
I'm handing it back to client having solved what he brought it for: started with LD leading to no charge then no boot when lines got corroded.. That's solved.
- Wasted time on U9600 but I'd like to think I may have saved it from near future failure since the pads were oxidized.
- Still some heat near U9600 and poking there still restarts laptop! Otherwise working normally.
I'm handing it back to client having solved what he brought it for: started with LD leading to no charge then no boot when lines got corroded.. That's solved.
Last edited:
rany
New member
larossmann tried to upload picture of U9600 with oxidized pads. Got => Error while saving content: SyntaxError: JSON Parse error: Unexpected identifier "Forbidden"