Search results

Great thanks for the help! May as well mark this as solved, just wanted a second opinion??

Thought that might be the case. I will test with the known good MagSafe board. Yes it’s a 85W tip wired up to the PSU, should the voltage input be set at 18.5 or 20V? I notice on the schematic it says 20V not 18.5 so that could be why the machine is not powering up normally.

Hi everyone, i have a strange board in at the minute which ive never experienced before. When a magsafe adapter is connected it ends up burning out the two end pins on the MagSafe board and kills the charger. a little reluctant to plug in my charger as they are so bloody expensive! The...

Okay back on it - swapped out the cables for the PSU as they were getting old anyway. Powered on straight away..... thanks for the help as always!

Yes 85W from the PSU. Louis I will check if it pulses when I’m back at the office. Thanks!

missing PM_SLP_S4_L :( any ideas of common areas for this to fail? I have 41k on the clock signal. Is this too high?

replaced D7010 and i now have a light on the charger. Missing PP5V_S3 so will troubleshoot U7501

okay so without the wire on R7011 i get 16.3v on each side

Okay will do that later on - also forgot to add that D7010 was actually missing altogether. Do you think this is causing the problem?

Update: Ran a wire from pin 1 of Q7020 to pin 1 Q7010 and i get a green light and PP3V42 obviously now present.... still not powering on though. Will pick this up again in the morning

Hi, I get no green light on 820-4924. ISL area looks perfect for ref. On D7005 i get 0.02v on pin 1 which should be 16v+ Likewise for pin 2 its 0v. On Q7010 i do get voltage on pin 1 at 16v but I'm confused what the DCIN ISOL area is for and whether this is causing the issue? Any ideas? Thanks

Tried another SMC and were on! Must have had a dodgy one. Thanks for the help!

Hi again - replaced the SMC and i'm still getting no green light...clicking noise has now stopped and PPBUS_G3H is still 12.26v. SMC_RESET_L is still high Any ideas?

Okay good to know! - it’s at the back of the queue now lol but I will post an update after the SMC replacement

I was still getting 12.27v but I’ll double check the area again. Otherwise I’ll replace the SMC ?

Thanks - yes board only. Around the SMC looks okay, no red areas and no corrosion

Thanks for the info - U5010 looks good - PIN 5 SMC_RESET_L is 3.448 volts. History is apparently an iPhone charger was plugged in and it turned off. SMC Reset didn't work. Could this be the SMC affected?

Hi there, New to this so bear with me... I have a board that has no green light and will not power. It also makes a ticking noise. I have put a new ISL on so far and tried a different magsafe board. on PP3V42 i have = 3.481v which i assume is okay... PPBUS_G3H is = 12.27v On U6900 pin 1...