MacBook Pro 13" power problem (late 2011)
Recently my MBP stopped charging, it was still running so I tried my dads charger that works, didn't work for me. I tried a smc reset and still it didn't work.
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I have salvaged and fixed 18 TVs (1 DLP), 22 LCD monitors, 8 stereos, network stuff, and more laptops and computers than i can count.
Service Menu/Factory Reset Codes for TVs
http://www.badcaps.net/forum/showthread.php?t=24809 -
Re: MacBook Pro 13" power problem (late 2011)
I have the same problem with my MBP 2011. I have tested the fuses and stuff on the logic board with a multi-meter and I get 16v at the battery plug so I am not sure why the battery isn't getting charged. I have tied all the resets and normal fixes and nothing has worked so far. The computer boots up fine if I charge the battery in a deferent macbook and then put it back into this one.
The unit was water damaged when I bought it so there has to be a bad cap or a fuse or something on the board somewhere.
Does anyone know where to find a schematic for th charging circuit? I know apple tries their hardest to hide these but I am hoping to find someone that has made a generic one to show other people where the power flows.
Thanks in advance for anyones help. -
I have salvaged and fixed 18 TVs (1 DLP), 22 LCD monitors, 8 stereos, network stuff, and more laptops and computers than i can count.
Service Menu/Factory Reset Codes for TVs
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: MacBook Pro 13" power problem (late 2011)
Ok so I found the charging IC circuit you were referring to.
http://www.ebay.com/itm/1x-NEW-ISL62...item35b6b9bde0
I did some testing with my multi-meter around th chip and in 3 spots I get the full 16v reading. But on the other side of the IC circuit I only get 3 to 5v reading and in 2 other spots I get 12v. This is a water damage unit should I try to reflow the chip before I order a new one. Maybe a few solder joints are cold and that is what is causing the lack of conductivity. Tell me what you think before I go ahead and give it a try. Thanks for pointing me in the right direction. I can't find a good schematic to go off for proper readings.Comment
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Re: MacBook Pro 13" power problem (late 2011)
Wouldn't hurt to tryI have salvaged and fixed 18 TVs (1 DLP), 22 LCD monitors, 8 stereos, network stuff, and more laptops and computers than i can count.
Service Menu/Factory Reset Codes for TVs
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: MacBook Pro 13" power problem (late 2011)
should I just reflow that or are there adjacent items I should include?Comment
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I am looking at an A2337 and found this for the order of power rails and what they do. Can this be confirmed before I dive into hunting down power rails that do not exist or are not neccisary?
- PPBUS_G3H (12.6V-12.8V)
- This is the main power rail that supplies power to the entire system. Check this rail first, as it must be present for other power rails to work.
- PP3V42_G3H (3.42V)
- This power rail is derived from PPBUS_G3H and is used to power the SMC (System Management Controller) and other essential circuits. It should be present if PPBUS_G3H is working correctly.
- PPVRTC_G3H (3.3V)
- This
- PPBUS_G3H (12.6V-12.8V)
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Dear community,
this is my very first post, I am quite new to macbook repairs, and I am excited:-)
I have a 2011 MacBook Air 13' that does not power on. No fan spin, nothing.
Here are the specs:
MacBook Air Mid-2011
CPU: 1.7 GHz Core i5 (I5-2557M)
Model: A1369 (EMC 2469)
RAM: 4 GB
VRAM: 384 MB
The first question:
Unfortunately, it came with a 'fake' power adapter which seems not to talk to the computer. Sometimes it does show green light immediately after connecting it to the board,... -
I have an LG Plasma TV 60PM6700 for the past ~12 years.
In the last ~3-4 months I have been having some issues.- Problem: It started with random picture disappearing (sound still worked).
Frequency: Happened about once a week.
Solution: Had to turn off TV wait a few seconds before turning it on again. - Problem: Then it got worse and the TV started to shut down and when turning on the no picture just sound.
Frequency: Happened about once a week.
Solution: Had to turn off TV wait about 10-20 seconds and turn it on again to solve. - Problem: TV shuts down
- Problem: It started with random picture disappearing (sound still worked).
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When I reflash again the bios of hoaca388 the unit powers on and the unit lives!!! Hooray!! All voltage in the coil 3.3v, 5v and 6.7v indicate charging are all present. including the cpu voltage , EEPROM and GPU voltage the unit is now alive, normal screen booting to windows and log in screen until I power it off. Then the unit never goes on even when pressing the power button in the keyboard.. Voltage reading 19v main , 3.3v VCC in IT8225E-128 and EEPROM VCC 0 volt and the charging voltage 0 volt.
Try to trace the power switch button goin to the power switch IC PU8803 (APL3533AQBI-TRG)... -
Hello, trying to fix C9 55 inch. I have pulled the back and all looks completely normal with nothing burnt so far. This is first time attempting to fix a tv so any help is appreciated.
Problem. I hit power button, red light on TV turns off and tries to turn on, no picture shows up and then shuts off. This occurred after house power turned on and off, not from a storm.
I have tested the power going from power supply to main board, all 12v and 20 volt readings are proper when I hit power button.
The power supply to t con is different story.
This...
Comment