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Search: Posts Made By: Strolch
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-10-2022, 04:05 AM
Replies: 19
Views: 688
Posted By Strolch
Re: A1932 - Black screen, no startup sounds

I unsoldered U8400. 3pins don't look good one pin is gone. Pin 8 is not connected. I will rebuild the 3 pins and solder in U8400. I hope the display will work again. Then I measure the other board.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-09-2022, 11:45 AM
Replies: 19
Views: 688
Posted By Strolch
Re: A1932 - Black screen, no startup sounds

Das sind die IC die ich gekauft habe
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-09-2022, 11:40 AM
Replies: 19
Views: 688
Posted By Strolch
Re: A1932 - Black screen, no startup sounds

I also installed the IC in the A1707 15 inch MacBook Pro! On the schematics the IC on both boards Air and Pro are the same LP8548B1SQ_-04 and LP8548B1SQ_-03 and the same contacts
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-09-2022, 11:32 AM
Replies: 19
Views: 688
Posted By Strolch
Re: A1932 - Black screen, no startup sounds

I bought 10 pieces from Ali. I'm not sure if it fits this board. The the IC both the same? The numbers are not the same.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-09-2022, 11:14 AM
Replies: 19
Views: 688
Posted By Strolch
Re: A1932 - Black screen, no startup sounds

Then I'll probably swap the U8400 from the board first and see if it works again.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-09-2022, 11:13 AM
Replies: 19
Views: 688
Posted By Strolch
Re: A1932 - Black screen, no startup sounds

I had slipped while measuring near F8400 and wanted to test the board and installed it. Then there was some smoke and the U8400 burned out ;-( from the intact board!
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-09-2022, 10:41 AM
Replies: 19
Views: 688
Posted By Strolch
Re: A1932 - Black screen, no startup sounds

Then do I have to remove the display to measure? Or just remove the 6 screws from the display board and fold the display board over?
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-09-2022, 12:40 AM
Replies: 19
Views: 688
Posted By Strolch
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-08-2022, 02:45 PM
Replies: 19
Views: 688
Posted By Strolch
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-08-2022, 02:44 PM
Replies: 19
Views: 688
Posted By Strolch
Re: A1932 - Black screen, no startup sounds

All right around 168K ohms after a few seconds.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-06-2022, 12:49 PM
Replies: 19
Views: 688
Posted By Strolch
Re: A1932 - Black screen, no startup sounds

From C8469-C8473 I have 43 volts on the board where the display works. On the board where the display remains black, I have 0.0200 volts from C8469-C8473!
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-06-2022, 10:58 AM
Replies: 19
Views: 688
Posted By Strolch
A1932 - Black screen, no startup sounds

Apple MacBook Air 13" A1932 2018. It's on. Touchpad clicks and board gets warm. There is no start-up sound and the display stays black. The audio board was defective after liquid damage. Nothing is...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 03-27-2022, 01:38 PM
Replies: 32
Views: 1,226
Posted By Strolch
Re: MacBook Apro 16" A2141 Just 5,181Volt

I think 0.8V is not enough. I can't find a warm spot. br. I Hope ist right so ;-) br
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 03-27-2022, 12:21 PM
Replies: 32
Views: 1,226
Posted By Strolch
Re: MacBook Apro 16" A2141 Just 5,181Volt

Yes, I have the adjustable power supply ;-)
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 03-27-2022, 09:57 AM
Replies: 32
Views: 1,226
Posted By Strolch
Re: MacBook Apro 16" A2141 Just 5,181Volt

H, I'll solder one wire to pad 2 and stick the other to ground. I don't have a thermal imaging cam yet. But that's coming. But I have alcohol. At 0.8 volts and 2A nothing got warm yesterday. can i...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 03-26-2022, 08:55 AM
Replies: 32
Views: 1,226
Posted By Strolch
Re: MacBook Apro 16" A2141 Just 5,181Volt

is this the same cam on Amazon? so much more$
https://www.amazon.com/Motherboard-Troubleshoot-Professional-Diagnosis-Instrument/dp/B07BHCJXLH
i will buy the one from the video you post
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 03-26-2022, 07:28 AM
Replies: 32
Views: 1,226
Posted By Strolch
Re: MacBook Apro 16" A2141 Just 5,181Volt

Hi, is this a good short cam?...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 03-23-2022, 03:22 PM
Replies: 32
Views: 1,226
Posted By Strolch
Re: MacBook Apro 16" A2141 Just 5,181Volt

A picture of my beautiful power supply ;-). I think so its right 0,8+2A
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 03-23-2022, 03:06 PM
Replies: 32
Views: 1,226
Posted By Strolch
Re: MacBook Apro 16" A2141 Just 5,181Volt

Hi mon2, I get the power supply now. should I now set 0.8 volts and 2 amps? br
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 03-21-2022, 02:24 PM
Replies: 32
Views: 1,226
Posted By Strolch
Re: MacBook Apro 16" A2141 Just 5,181Volt

Hello, I bought this model yesterday! Cheaper than Ali!

https://eleshop.de/owon-spe3102-power-supply.html
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 03-20-2022, 11:38 AM
Replies: 32
Views: 1,226
Posted By Strolch
Re: MacBook Apro 16" A2141 Just 5,181Volt

No I have not current limited power supply and thermal camera. But I will buy it today!
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 03-20-2022, 10:41 AM
Replies: 32
Views: 1,226
Posted By Strolch
Re: MacBook Apro 16" A2141 Just 5,181Volt

Unfortunately, I don't have a current-limited power supply. what does it look like? Then I'll buy it ;-). But I hope we can do it without now.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 03-20-2022, 10:19 AM
Replies: 32
Views: 1,226
Posted By Strolch
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 03-20-2022, 10:17 AM
Replies: 32
Views: 1,226
Posted By Strolch
Re: MacBook Apro 16" A2141 Just 5,181Volt

We have at Pin1= 12.227 volts
Pin2=0Volt
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 03-20-2022, 07:06 AM
Replies: 32
Views: 1,226
Posted By Strolch
Re: MacBook Apro 16" A2141 Just 5,181Volt

I absolutely have to get books to teach SMD Technink.
Showing results 1 to 25 of 135

 
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