Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
06-22-2022, 10:54 PM
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Replies: 12
Views: 690
Re: 820-00840 dead 19.7v and 0.01A
update.. i found the short..it is C2977. but i lost some components when i open the shield. it is D3411, C3408 and D3403..is it ok if i dont replace the missing components regarding is is a supported...
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Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
06-22-2022, 10:22 PM
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Replies: 12
Views: 690
Re: 820-00840 dead 19.7v and 0.01A
update for this problem, i replaced U7000 but still no luck..checked again and found out that PP3V3_TBT_X_F is shorted but i check the others PP3V3 line are not shorted..
any suggestion?
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Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
05-14-2022, 12:25 AM
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Replies: 26
Views: 1,172
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Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
05-12-2022, 09:00 PM
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Replies: 26
Views: 1,172
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Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
05-10-2022, 09:32 PM
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Replies: 26
Views: 1,172
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Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
05-10-2022, 04:18 AM
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Replies: 26
Views: 1,172
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Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
05-10-2022, 03:00 AM
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Replies: 26
Views: 1,172
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Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
05-09-2022, 10:21 PM
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Replies: 26
Views: 1,172
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Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
05-09-2022, 04:36 AM
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Replies: 26
Views: 1,172
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Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
05-09-2022, 04:33 AM
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Replies: 28
Views: 737
Re: macbook pro 820-00840 have image no backlight
sorry my mistake. i measured wrong current sense resistor.
the current sense resistor is R8400 right?
the resistance between the fuse and the current sense resistor is 0.5 ohm
the voltage at the...
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Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
05-06-2022, 10:01 PM
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Replies: 28
Views: 737
Re: macbook pro 820-00840 have image no backlight
plugged the adapter to turn on...shorted the R8402 pin 1 but still no sign of backlight..
changed again the U8400 but still the same...
after change U8400 BKLT_EN_R is 3.3V but still no backlight
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