Laptop had a soft drink spill, luckily keyboard is still working, power button and touch id too. Only angle sensors is reporting screen always closed so i removed it. On the board i found only 1 spot with liquid damage. Laptop worked for a month or so then started...
mosfetratus
Sure Not
Last Activity: 06-19-2024, 03:29 AM
Joined: 02-03-2019
Location: CapCity
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recently this laptop had a strange behavior. When shut off charger would go off - no light, and mac won't react to power button. But trackpad is still clickable. So i hold power button to reset, trackpad no longer clicks, still couldn't boot afterwards. Sometimes it worked correctly, power on when charger is connected, etc.
Laptop had a soft drink spill, luckily keyboard is still working, power button and touch id too. Only angle sensors is reporting screen always closed so i removed it. On the board i found only 1 spot with liquid damage. Laptop worked for a month or so then started...Last edited by mosfetratus; 06-18-2024, 09:44 AM. -
noticed that pros using usb C device to measure voltage, etc.
so bought one. Maybe someone will tell some pointers by watching at these results....Leave a comment:
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removed the chip, turned out clock was bad - pin 7, voltage goes random, dont have scope for proper analysis. Now im lost. Still get random voltage on that mosfet and on some other parts of the board....
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found two DC - DC converters - [url]https://www.ti.com/lit/ds/symlink/tps62130.pdf[/url]
one spits out 1V to 5V garbage, other is no output, maybe system needs to be fully on.
Cannot trace out connection to where it goes when disconnected from power supply, i get megaohms.https://found two DC - DC converters... get megaohms.found...Leave a comment:
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https://[url]https://www.vishay.com/...andom voltage.[url]https://www.vishay.com/docs/62055/sizf5302dt.pdf[/url]
it looks like sw pins are getting random voltage if the design is the same, so likely mosfet is not the problem. I found other places with random voltage....Leave a comment:
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the look like AONE36196...
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cant edit previous post to add image...
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Measured voltage on caps before that component - color green. Solid 5.18V....
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Apple silicon only resets by pressing power button for about 10 seconds. Such a noob. But still i get this problem and discovered an anomaly on the board. So i guess this component was semi alive and i got some lucky resets.
Voltage goes from from 1.2 to 5V in random values.
Photo shows highlighted components. Need second opinion, i'm a hobbyist.
Can't find any info about this component
5302 t34 cw​
Thanks...Last edited by mosfetratus; 06-12-2024, 08:55 AM.Leave a comment:
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macbook A2918, orange light off when shut off
When i fully shut off mac, orange light goes off and wont react to power button. I have difficult time resetting with combination "shift+control+option and power button", because it rarely works (reason unknown), when i manage to get orange light and then press power button macbook wont turn on and orange light goes off. When i hold combination with power button it turns on, and works fine if put it to sleep mode.
Works with battery and charges, but when i shut off i get this problem.
It had liquid spill. Board has no corrosion, keyboard is working, power button...Last edited by mosfetratus; 05-31-2024, 03:49 AM. -
It needs to be fully assembled so the pins on the board are grounded. Otherwise board will act as dead.Leave a comment:
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"Fixed". The board was OK. At first i was thinking that the board was faulty, because i was told so.
Faulty angle sensor immediately shuts off mac after brief apple logo and slight bar load. Removed angle sensor and it boots fine.
For the MB to power, you need to ground pins on the board and then plug power adapter. For battery to output power it needs to communicate with MB otherwise it will not output any voltage.
I need to fix angle sensor or maybe i can can use older gen senors, because they look the same apart cable form factor....Leave a comment:
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Power brick has no power output, with disconnected magsafe from the board. Maybe we need to figure out my power brick question.
This circuit goes to USB C ports, above two USB C is a smaller connector that connects to a magasfe and goes to the other side of the board....Leave a comment:
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macbook pro m3 a2918 - dead
[URL=filedata/fetch?id=3231247&d=1709928624][ATTACH=JSON]{"alt":"Click image for larger version Name:\t1.jpg Views:\t0 Size:\t1.86 MB ID:\t3231247","data-align":"none","data-attachmentid":"3231247","data-size":"small"}[/ATTACH][/URL] Does it need to have a working battery to power up? Because i removed battery terminal and measured voltage which was 0 volts. It was liquid damaged, but the board looks OK apart one spot.
At first it was sent to repair, apparently they only took money. Too bad they did...Last edited by mosfetratus; 03-08-2024, 02:14 PM. -
Re: xbox 360 150w, no 12V
Noticed gate voltage for output mosfets (FDPF3860T) is low, o.4V. Needed to remove glue, to see components.
Yellow circle component is semi short between yellow points, voltage drop of 033 in diode mode. So i removed it, still same result between points.
[url]https://ibb.co/dPmKRZb[/url]
Power supply does have 12V output when i short 5volts on power supply plug to simulate power button press, but soon gets RED light on the supply when holding short.Re: xbox 360 150w, no 12V<br /> <br...d gate voltageLeave a comment:
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Re: xbox 360 150w, no 12V
no idea :\
board photos
[url]https://ibb.co/3R9VvmV[/url]
[url]https://ibb.co/gPgc0hG[/url]Re: xbox 360 150w, no 12V<br /> <br.../gPgc0hG[/url]Re: xbox 360 150w, no 12V
no idea :\
board photos
[url]https://ibb.co/3R9VvmV[/url]
[url]https://ibb.co/gPgc0hG[/url]Re: xbox 360 150w, no 12V<br /> <br.../> no idea :\...Leave a comment:
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Re: xbox 360 150w, no 12V
Appears that part i suspected not to be working is actually OK, did switcheroo with working power supply.
Any tips, because my knowledge about power supplies is zero.Leave a comment:
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Re: xbox 360 150w, no 12V
when i short std. by with 5V to enable 12V, green light goes for few seconds than goes red.
Console works fine, tested with good power supply.Leave a comment:
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xbox 360 150w, no 12V
Doesn't provide 12V.
When 5v stand by is manually shorted to pwr. en. pin power supply provides power, but when i release jumper it shuts off, doesn't register/hold enable signal.
traced enable pin to "LTA502SI-1". I couldn't find datasheets to it.
Looking for advice, if this is the right suspect.
No activity results to display
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