Lenovo T470 turns on and off in seconds while charging. But it won't turn on without charging.
The power supply generates 0.1A, turns on with the orange LED, the fan spins for 1 second, and off.
It looks like the motherboard has some work previously on the CPU and another component. came to me also without cmos battery.
I don't have boardview for further examination.
Please kindly assist me to solve this problems..
acata
Senior Member
Last Activity: 04-23-2025, 03:44 AM
Joined: 06-19-2021
Location: Medan
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Lenovo T470 Turn on and off in seconds while charge
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Thank you. I will take a look at that file. maybe I can learn something from it.... -
I did. The screen was damaged but it have a backlight on another motherboard. The replacement doesn't have any response, no backlight, no display, but it working on another motherboard....Leave a comment:
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Thank you. Still no luck finding the schematics, diagram or boardview....Leave a comment:
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MSI katana gf66 12UCK internal display not detected.
MSI katana gf66 12UCK internal display not detected.
External display check fine, displaying on 27inch 1080 external monitor while checking with rendering some premier files.
Rendering and heavy work ok. So my assumption it is not VGA problems.
Check EDP cable (it is one EDP cable. might miss some others) camera working fine.
I have no board view, diagram or schematic for this board. I have check some components near the display connector. It's just 20v and 3.4v. I don't know which component should distribute 1.8v. -
Along with board view if anyone have it.
Thank you...Leave a comment:
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Asus ZenBook X14 Oled UX5401
I'm looking for Asus ZenBook X14 Oled UX5401 schematic and diagram. -
Lenovo Ideapad slim 3 not power on
Lenovo Ideapad slim 3 not power on after consumer problems is can not on after sleep mode.
And the consumer asked for reinstalling OS.
I reinstalled windows 10 and working fine. After i leave it for updating windows and goes to sleep mode. Now it cant draw any input from power supply.
Motherboard number is GS450&GS550&GS750 MM-C821 REV: 1.0
Check the main power rail for 20v input ok
No amper input from Power supply 0.013a
Mosfet PQ201 20v and 26v ok.
3.3v exist
1,8v exist
5v exist
12v from baterai exist.... -
Not yet, sir..
I'm still working on it and I can't find 3 more pin to connect the wire. Thats why i need any of diagram, schematic or boardview for this board.
Or if someone figure it out. I need the picture or a drawing of the pins to the connector.Leave a comment:
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WD MY PASSPORT 2TB WD20NMVW BOARDVIEW
This might out of the topics but here I post on General electronic.
I've got client who broke his external HDD connector.
It's WD MY PASSPORT 2TB WD20NMVW with USB 3.0 connector. The connector pads tear apart.
I've been looking around for the diagram or schematics for this board. But have no luck. I don't have any membership on any storage device forums.
Would love if you can help me..... -
Thank you...Leave a comment:
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Thank you.....Leave a comment:
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ACER 4540 COMPAL LA-5521P Rev:1.0
I need a schematic and diagram for ACER 4540 COMPAL LA-5521P Rev:1.0 -
This one works so far.
But I still can't turn off the fast boot.
I have already tried another version of Acer [URL="https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/bios-requests-only/43280-need-acer-v5-471pg-bios-dump"]v5-471 BIOS[/URL] but I have had no luckThis one works so far.
But I still can't turn off the fast boot.
I have already tried another version of Acer [URL="https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/bios-requests-only/43280-need-acer-v5-471pg-bios-dump"]v5-471...Leave a comment:
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Acer V5-471G Can't Read BIOS
I have Acer V5-471G Can't Read BIOS.
BIOS IC is new and the old one also in good condition.
I already tried several BIOS DUMP, but Is still can't enter BIOS.
Once the laptop turns on, it just goes directly to os.
PIN 1 3.3V
PIN 2 3.0V
PIN 3 3.4V
PIN 4-6 0V
PIN 7 3.4V
PIN 8 3.4V
19.5v in 0.6a
5v ok
3.3 v ok
1.2v ok... -
thank you [USER="237374"]SMDFlea[/USER]
I just found that if this version share similar BIOS.JQSSMDFleathank you [USER="237374"]SMDFlea[/USER]
I just found that if this version share similar BIOS.JQSLeave a comment:
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Need acer v5-471g bios file.
It just can't boot to bios F2 or change boot F12.
I just can enter to diagnostic once it can't boot to os (unpludge).
board is:
PETRA UMA MB 11324-1 48.4VM02.001
INTEL CELERON 887 SR0VA
Here is the backup...Leave a comment:
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I just have the boardview.
The laptop turning on. No display.
Vin 19.5v distribute entirely.
1.2v ok
3.3v ok
5v ok
MOSFETs good.
Everytime it boot up on 1,2a, the gpu start to heat up that I can't touch. I don't have a thermal camera. Just using my finger tips to track the heat.
Please guide me if my judgement are incorrect....Leave a comment:
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here is the reference. X441UAR with no GPU....
Leave a comment:
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Asus X441UV REV2.1 remove Nvidia gpu
I am working on Asus X441UV with Nvidia 930mx 4gb.
The whole power rail is fine except the GPU heats up at the first boot.
is it possible to remove the entire GPU component and flash a similar BIOS?
FYI:
I don't have a BGA workstation so the option is just to remove all GPU components with Hot Blower QUICK 850 analog and solder....
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