I've got no power TO the KBC chip after replacement, nothing at the 5 power-in pins. Backing up a bit, there is nothing at the resistor before the capacitors leading to the power pins either. Do have 3v at bios chip and 3v from power button at KBC though. Also have 3.3 and 5v from TPS51123
No power to KBC after chip change
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Re: No power to KBC after chip change
You have to look at Q2703 and Q2705. Why did you change the EC first place? With only battery connected the same thing?
Check the pictures at this page, was the machine with water damage?
http://notebook1.ru/forma1/viewtopic...=93849&start=0Last edited by khaahk; 11-12-2014, 05:10 PM.Comment
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Re: No power to KBC after chip change
You have to look at Q2703 and Q2705. Why did you change the EC first place? With only battery connected the same thing?
Check the pictures at this page, was the machine with water damage?
http://notebook1.ru/forma1/viewtopic...=93849&start=0Comment
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Re: No power to KBC after chip change
yes could be not been sitted , chek with a metal pick and pass on all pins , if any move , then resolder again .. i must post a video of how i solder the te KBC's but dont have a good camera and a tripe to do it .Comment
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Re: No power to KBC after chip change
Removed the chip and when I flipped it over I have a bunch of solder bridges between many of the pins. Not sure how I'm gonna clean them up but will report back when I do and resolder chipComment
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Re: No power to KBC after chip change
prefect video how to solder chips. kbc is soldered by drag soldering from 2:00
https://www.youtube.com/watch?v=5uiroWBkdFYComment
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Re: No power to KBC after chip change
Probably a no-no, but even with chip removed there is no power on either side of R2771 (p. 27 upper left)Comment
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Re: No power to KBC after chip change
prefect video how to solder chips. kbc is soldered by drag soldering from 2:00
https://www.youtube.com/watch?v=5uiroWBkdFYComment
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