I received Toshiba Qosmio X755 that has a charging problem and I'm stuck trying to figure out the problem.
- When battery is unplugged i works without any problem.
- When I plug in the battery after plugging in the charger, it works correctly and the battery is charging.
- When I plug in the charger after inserting the battery, it stops working. ( voltage dropped and consumed 8A, reaching the maximum capacity of my bench power supply for 5 seconds, and stop working after )
Can you help me diagnose the problem? I have attached...
Re: Macbook Air A1466 does not turn on when pluged
I may have expressed myself badly, that's why you're lost. Sorry!
You asked me in post #10 to short SMC_RESET_L to ground . So, i said that logic board turn on
this has the same behavior than SMC RESET with keyboard ( SHIFT+CTRL+OPTION +POWER_BUTTON ) the logic board turn too .
And yes, when using tweezers @ R5115 with the battery only the logic board turn on
Re: Macbook Air A1466 does not turn on when pluged
No, even with battery or charger SMC_RESET_L does not go low when R5115 is shorted ! ( it should be ? )
With shorting SMC_RESET_L to ground the logic board start up
( by the way i think this is a manuel SMC RESET ? it has the same behavior as when i press SHIFT+CTL+OPTION + POWER BUTTON => it reset the SMC brief green light on the charger and logic board startup )
I have a Macbook Air (820-3437) that have an startup issues :
- it starts right away when i plug the charger ( even with a good connected battery) .
- when shut down, if i press the power button it wont startup when the charger is plugged in but starts when i unplug the charger ( on battery ).
- i have no issue with charging battery .
- i had already checked SMC_ONOFF_L , PM_PWRBTN_L are OK
Can you please help me to figure out the problem ?
Thank you
I have got a macbook A1706 ( 820-00239 ) to repair .
I found that the camera cable connector J0802 ( from the lcd pcb ) was water damaged.
I removed the connector from the pcb side, but the side of flex cable was entirely damaged. i have to cut it and rewire all .
I have found this picture of scratched camera flex cable but i didn't figure out the pinout.
I repaired a dead Lenovo L380 by replacing 3.3v/5V TPS51225[COLOR="Red"]B[/COLOR] chip with TPS51225[COLOR="Red"]C[/COLOR] that i recovered from a donor board .
It works but I'm not expert enough to tell if this is good or not ?
Can any body tell me what is the difference between the two and if the replacement is good ?
this is a link for the datasheet
[url]https://cdn.badcaps-static.com/pdfs/d6e896023792029cdbe39146e574617f.pdf[/url]
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