Hello,
I receive two board like this last weeks ~ same symptoms:
[URL]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/3488887-lenovo-ideapad-3-15alc6-82ku-board-nm-d521-blinking-continuously-0-5a[/URL]
I finally think the blinking of the power button is not important, maybe caused by the battery discharged or absent. (test with the battery, the blinking may stop)
I 'll recheck these board by the end of the week and i'll tell you if i found something.
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LENOVO IdeaPad 3-15ALC6 - 82KU (board NM-D521) blinking continuously 0.5A
Hello friends,
I have this laptop AMD Platform starting & not posting, fan spinning.
When i press power button, the board get almost immediatly 0.5A ~ and board get stuck at 0.5A with power button led blinking indefinitly.
If i stop the computer (pressing 5s power button), board stop and when i restart i get approx 0.37A ~ and
I try to reflash the bios with no luck, same result, and i try disabling onboard ram (i remove resistors accordling schematic), no more progress.
CPU and his area heat, maybe the cpu is dead?
...
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So finaly i change the mofset, i plug charger and.... I heard a little "CLICK" oh that's weird !
Charger was still not working... I try with another one and again "CLICK" ok, something defintly wrong ...
I remove the diode and take my measurement and there was a short on the drain ! my bad, i didn't check after removing the mofset.
After replacing the defect caps and the diode (for the 3rd time) everything works perfectly !
Thank you again Mon ! 😃...
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Thank you Mon,
Link to BV an schematics:
[url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/3486164-acer-swift-sf-tl-gh4ut-la-l151p[/url]
I'm noob & curious, so i have some questions: (i attached an image to explain my questions )[LIST][*]I see on the schematic 19V_ADPIN after DC jack and i don't see where it goes?[*]And +19V_ADPIN_P2 from where it comes or where it goes?[*]Who open the first mofset (PQ1) ? AC_OFF ?[*][/LIST]I'll check ACIN tomorrow,...
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ACER SWIFT SF... TL GH4UT LA-L151P
Hello friends,
Shematic is for TL GH4UT LA-L151P [B]1A.[/B] (not the same IC chip in 2B and maybe others changes)
Boardview is for LA-L151P-[B]R2.0 [/B]sadly all line are missing on the boardview.
I tried with boardviewer and flexbv but can't use the line...
Good luck !Hello friends,
Shematic is for TL GH4UT LA-L151P [B]1A.[/B] (not the same IC chip in 2B and maybe others changes)
Boardview is for LA-L151P-[B]R2.0 [/B]sadly all line are missing on the boardview.
I tried with boardviewer and flexbv but can't use...
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No Power ACER SWIFT GH4UT LA-L151P 2B (DC or type-C)
Hello friends, i'm stuck....
I have this board not taking current.
When i plug DC jack, current stop at 1rst mofset and i get 0V on PIN 18 DCIN of IC CHARGE (ISL9238) (i get 0V every pin of IC)
I don't found any short for now.
On type C I get CC1 or CC2 at 5V and that's all, no VBUS nothing else...
I dont know where to look now...
Any help please?
I dont find the exact shematic only the 1A version and boardview miss all the line.
I can post the shematic i have and boardview if you want.
Thank...
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Hello !!!
Sorry guys, noob problem, I'm ashamed !
I put my power supply to high (20V ~) and it was too much for the IC, the Overvoltage protection was running and ACOK was LOW because of it !
Immediatly after lower the power supply to 19.5V the ACOK was high and everithing work now.
Good to know and Thanks [B][URL="https://www.badcaps.net/member/1694-rogfanther"]rogfanther[/URL][/B] for the clue.
The problem was due to liquid damage on the keyboard, the keyboard is actually shorted to ground... Not a motherboard problem actually......
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HP BOARD LA-H323P (Not mofset again ?!)
Hello guys,
I quadruple check my dc mofset and they are not leaking.
But first one is giving me million and millions ohms in every ways (gate <> source <> drain <> gate) could it be this little b....?
But I get not voltage after first mofset 0V, I get 0.95V after 2nd mofset.
On my ic chip i get: (without battery)
ACN 0.91
ACP 0.91
CMNSRC 0.38
ACDRV 0.05
ACOK 0
ACDET 3.1
IOUT 0
SDA 0.1
ILIM 0
BATDRV 2.2
SRN 0
SRP 0
GND 0
LODRV 0
RGN 5....
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Hello,
I'm still stuck with this board, i remove the UC22 but still get low resistance, i inject again and another chip heat : UPD2.
I remove it but still get low res !
When i remove UPD1 i get a correct resistance to ground on [B]+3VALW[/B] [B]only.[/B]
Any idea?Hello,
I'm still stuck with this board, i remove the UC22 but still get low resistance, i inject again and another chip heat : UPD2.
I remove it but still get low res !
When i remove UPD1 i get a correct resistance to ground on [B]+3VALW[/B]
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FX516PR not charging on DC charger (but charging on Type-C)
Hello friends,
I have this board not charging with charger, working fine on battery and type-C charger.
Here what if found: my IC chip miss VCC so i follow the line P_CHG_VCC_30 (0V) to P_CHG_VCC_R_30 (0v) and i get 20V A/D_DOCK_IN.
I loose my 20V on the PQ9009, i think it's dead because it's a P-Channel and I get 0V on gate and 20V on source and finally 0V on drain.
Am I right?
Links for shematics and boardview: [url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/97943-need-schematic-boardview-asus-tuf-dash-f15[/url]...
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Hello guys !
Finally the IT8225VG-128 doesn't need to be flashed.
I just messed up my replacement!, I start again with the same chip, i clean it and I reball this sh**, i resoldier it (on the board after good cleanup) and now the board work perfectly.
So thank you again, happy ending !
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Hello, this post is quite old, but it could be usefull for other people...
To open the boardview you need [URL="https://www.cadence.com/ko_KR/home/tools/pcb-design-and-analysis/allegro-downloads-contact.html"]Allegro/OrCAD/SIP/MCM FREE Physical Viewers 16.6 - 15MB[/URL].
Good luck with that soft, really not user friendly!
[URL]https://www.cadence.com/ko_KR/home/tools/allegro-downloads-start.html[/URL]Hello, this post is quite old, but it could be usefull for other people...
To open the boardview you need [URL="https://www.cadence.com/ko_KR/home/tools/pcb-design-and-analysis/allegro-downloads-contact.html"]Allegro/OrCAD/SIP/MCM...
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DELL XPS 13 7390 no power, short 5alw & 3alw
Hello guys,
I have this board, taking no voltage on usb-c.
After some diging, i found that 5alw (1ohm to ground) & 3alw (7ohms to ground) are both short to ground
So i open jumps @PJP300 & @PJP401 and found no shortage on both 5alwP & 3alwp.
So i try to inject on both 3alw & 5alw with no luck: i get some heat on UC22 & UC23 but that's all.
And now i'm stuck.
Please find attach schematics. [COLOR=#d35400][B]Link to schematic[/B][/COLOR] --> [url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/94268-dell-xps-la-g172p-schematic-brd-request?p=1661615#post1661615[/url]...
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