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That's measured with no power. that is with the u symble

Ok I have had a closer look at resistors around u6100 u1900 and it seems that r6101 and r2042 are no good. r6101 is meant to be 3.3u says schematics but it reads 12.50 and r2042 reads 10.58 would this cause it not to turn on ?

I have checked all the above mentioned ic's for corrosion ot signs of damage. they all look fine and I've checked pin 8 and its corresponding chips for continuity and they test ok. the only corrosion I found on the board was what I mentioned when I first posted this post. r1663 r1661 r1669 they...

Ol got. that high reading on PM_PWRBTN_L is that high when r5116 is shorted. first reading was when I shorted r5116 for about 10 seconds then removed the short and checked PM_PWRBTN_L the reading was a stable 3.431 but it seems to be that all the time. so it's like the shorting of r5116 to...

Just to clarify PM_PWRBTN_L is stable 6.420v wile r5116 is shorted. I'm for real of to bed now lol. Talk in the morning

Hey thanks heaps for your patience with my stupid questions and mistakes. really appreciate it.

I just assumed you meant short it while I check if. I just done that. is is now 6.420v

I stayed up fixing a ipad. I just checked l7560 3.329 and its stable just jumped r5116 for 10 seconds then turned board over to check PM_PWRBTN_L it's a stable 3.431 do you mean to jump it continuously until I've checked PM_PWRBTN_L ?

Got to go to bed guys. will be back in the morning it's nearly 10pm and I've got the kids fr the morning while my wife goes to her friends. will be back asap when we gets back. thanks again. I think we are making progress talk soon.

Ok... what da... the short disappears after a few minutes of no power.. it comes straight back once mag is plugged in??? why would this be so?

Bingo!!! short on c7500 which is ppbus_s5_hs_other_isns would it be correct to say this would stop it from running !!? now I just got to find where the short on that line is coming from. anyone got any suggested places to start looking ? thanks again

Was I meant to short r5116 while mag was plugged in ?

Reading for u7501 are as follows pin 23=8.59v pin 12=3.440v pin 21=3.440v pin 22=3.315v pin 29=5.02v pin 13=2.002v

Hey guys my apologies what I meant is when I short r5116. So I short it and plus mag in and no light. take short away and plug it back in and it works. so 3v3_s5 is there at 3.304

Yeah. Sorry been juggling work and family lately. wife is pregnant. l7560 is 0v thanks again talk soon. I'm off to bed. Night

PM_SLP_SUS_L is there. mag light won't come on when I short R5116 it seems the only line that is right is 3.450

Hey guys. Crazy day with the family. I will post findings in next few hours. thanks again you guys rock, appreciate all your support

3.329v on ppvrtc_g3h 3.321 on rtc 3.321 on pch_srt 3.011 on pch_int 3.217 on pch_inv 3.410 on SMC_ADAPTER_EN 3.325 on PM_BATLOW_L 3.440 on SMC_PM_G2_EN 3.408 on SMC_RESET_L I just checked ppvcc_so_cpu and it reads 0 volts. I seen some other guy with a similar issue out a post up. Could I...

Yes one wire is active. I'll check all them points and get back to you. thanks for responding

Post Reply SUBSCRIBE POSTS LATEST ACTIVITY Filter Hello everyone. last week I got a macbook air a1466 820-3437-b with reports that it stopped working. was told a few months prior to this that it was exposed to a tiny bit of water. also was told in the last 2 months prior to it...