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It needs to be fully assembled so the pins on the board are grounded. Otherwise board will act as dead.
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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....
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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....
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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.
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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 voltage
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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 :\...
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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.
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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.
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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.
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acer v3 772g wont charge
Wanted to calibrate battery by discharging it to 0%. Noticed that batteries are not charging anymore. I have 3 old ones. All detected, but won't charge, one is 4% left, other is 6% left. I unplug power adapter, works on battery.
All are detected. 0% bat is only 22% wear level. :\
Not sure if its the laptop or batteries.
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Re: acer v3-772g bios clock and windows
Replaced the crystal, and it works like a champ.
Thank you guys!
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Re: acer v3-772g bios clock and windows
bios time messes up windows. I get black screen, mouse pointer visible, when i set bios timer....
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Re: acer v3-772g bios clock and windows
i set time in bios and shut off computer. Removed battery and power cord. Bios kept time. Every time i boot windows, bios resets time.
When i shutoff windows, bios timer and windows timer is not synced. If you leave pc off for 20 minutes, windows time will be 20 minutes late to real time and bios time will be reset but 20 minutest past.
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Re: acer v3-772g bios clock and windows
RTC is 3V
i'm hobbyist, i don't have equipment to measure freq. of the crystal. :\
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acer v3-772g bios clock and windows
bios clock is not in sync with windows or linux.
When i remove OS HDD and manually set bios clock, time settings remain. But when i boot windows it keeps reset, other bios settings are not reset.
Battery is 3V full of life, it is replacement. Before it had a dead battery and the bios posted date like 2033, etc, after every restart.
Now with a working battery i don't get clock sync with bios and windows.
Laptop: acer v3-772g, uefi linux or windows - same bios thing.
Latest bios revision, because it's gtx 850m version MB (last ...
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Re: identify sata connector
Well, i fixed the problem. I needed to connect data lines, without them drive wont spin,. But still, i cannot find a replacement for such connector, because of unusual soldering layout. Every connector is inline.
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Re: identify sata connector
I did DIY sata connector with salvaged laptops female connector.
But i get two klicks and thats it. Drive doesn't spin.
Yellow wire - 12V
Black - GND
Red - 5V
Blue - GND...
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Re: asus x550l wont react to power button
FIXED
Was bad trackpad + bad cable.
Working trackpad had broken cable [From the laptop with BIOS problems].
Not working trackpad had good cable [From the laptop with trackpad "problem"].
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