Ok so I have a liquid damaged 820-3330 it’s been worked on previously as I found out further into working on it. It starts with a charged battery but with a charger will get green light but power cycling with fan spin and green light going off then coming back on and fan spin/green light. I’ve tried replacing Q7030, Q7035, Q7055 and U7000 and have checked R7021 & R7022 at c7020 and get 20 ohms, R7051 and R7052 are also correct. Anyone have any ideas?
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820-3330 power cycling on magsafe
- Thread starter Crazyfrog
- Start date
Steady voltage at F6905 with charger alone (no battery)?
If not, check with fake charger, or lab PSU.
If not, check with fake charger, or lab PSU.
The mentioned test is necesarry to detect an input leakage issue (on MLB), not charger problem!
Ok done 16.6v stable when greenlight and fans spinning then 16.9v when greenlight goes off.
Couple of other things I just ran ASD and fails the sleep test, ASD gives error 'no override file detected, please flash before running diagnostics'.
Also no serial number when osx is loaded so bios has been messed with.
I know it should be C02HLDP0DV33 according to the logic board sticker and box.
Couple of other things I just ran ASD and fails the sleep test, ASD gives error 'no override file detected, please flash before running diagnostics'.
Also no serial number when osx is loaded so bios has been messed with.
I know it should be C02HLDP0DV33 according to the logic board sticker and box.
Good BIOS already posted somewhere on the forum.
Take this, if you cannot find it.
drive.google.com
Check U6900/01 voltages, when no Magsafe light.
Take this, if you cannot find it.
820-3330-b DV33 MD103D clean medusa.bin
drive.google.com
Try another DCIN board and charger.
Check again U6900/01 voltages.
Check again U6900/01 voltages.
Change U6900.
When is enabled, pins 4/5 must have the same level.
Did you change DCIN small board???
When is enabled, pins 4/5 must have the same level.
Did you change DCIN small board???
Still not steady light on Magsafe?
If yes, then reball SMC; if SMC_BC_ACOK is steady high.
If yes, then reball SMC; if SMC_BC_ACOK is steady high.
Not a steady light on the lite on which after checking has an aftermarket cable but is on the delta, my 858d would kill a smc in my opinion I have to run at max temp to get macbook parts to move anyway.
If SMC is the only option I'll have to leave this just think its weird it works on battery not charger.
If SMC is the only option I'll have to leave this just think its weird it works on battery not charger.
Be aware this board requires 85W charger to start without battery.
However it should work with battery and even 45W charger connected.
A bad DCIN board can block battery charging.
SMC will not charge the battery, if cannot communicate properly with 1-wire memory from Magsafe cable.
However it should work with battery and even 45W charger connected.
A bad DCIN board can block battery charging.
SMC will not charge the battery, if cannot communicate properly with 1-wire memory from Magsafe cable.