hello, this lenovo turns on the fan the leds but the screen remains black, if I turn it off and on again for 5 or 6 times it eventually turns on regularly, I have updated the bios but no I have solved it
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Re: lenovo X240 sometimes it does not start
When screen is black, use a flashlight on the front of the display.
Can you see the video graphics on each power on?
If yes, then appears to be a failing backlight fault. -
Re: lenovo X240 sometimes it does not start
You can see if numlock key on usb kbd glows or not on every poweron attempt. That will give us an idea whether mb is posting everytime or not. Link schematic if available.Comment
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Re: lenovo X240 sometimes it does not start
the led of the usb keyboard do not light up and I forgot to mention that as soon as I turn it on, it emits 5 beeps - pause - 5 more beeps,i replaced the ram but the problem remainsComment
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Re: lenovo X240 sometimes it does not start
1) Remove the ram - power up - do you hear the same beeping pattern ?
2) Guessing that you will. Replace the RAM with a proper known good ram for this chassis.Comment
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Re: lenovo X240 sometimes it does not start
Asking again, is schematic avlbl?? Measure voltage & resistance on all coils. Consumption on dc supply with ram/without ram?Comment
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Re: lenovo X240 sometimes it does not start
I have no possibility to measure power consumption, however I wanted to inform that the note works only after having insisted on turning it on for 5/6 times, so I don't think there are broken components on the main otherwise it would not have worked ... maybe it needs to rewrite the firmware ?
tank'sComment
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This specification for the Lenovo ThinkPad X240 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the X240 boardview and X240 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo ThinkPad...09-06-2024, 08:35 AM
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This specification for the Lenovo ThinkPad X240 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the X240 boardview and X240 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo ThinkPad...09-06-2024, 06:14 AM
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Hi all,
I have a Lenovo Legion 5 with a Ryzen 7 series CPU and RTX 3070 GPU. My issue is that it turns on and all seems fine except after a few seconds the fans spin up high and the laptop turns off after 34 seconds.
I can get into bios and can even boot and login to Windows however after 34 seconds no matter if Im at the bios screen or booted into Windows it will just turn off.
I have managed to run HWmonitor and the temperatures of the CPU and GPU are fine, I can also touch the heatsync which is warm but not hot.
I have tried a few new bios but exactly... -
I've been using this laptop for quite some time w/o battery. It has Linux installed. Recently, someone sent me a web link in an instant messenger. When I clicked on that link the laptop turned off that instant, before the browser even loaded to open it. Since then it turns off several seconds after I start it up and log into the Linux graphical desktop. I can see the mouse cursor moving around the screen when I draw my finger on the touchpad or move the mouse, and then a terminal window begins to load because the desktop autostarts it from last time, and then I hear a pop from the speakers and... -
I have a Lenovo Legion 5 Pro laptop - NM-D601 REV1.0 when I connect the battery it turns off after 5 minutes of use, if I don't connect the battery the laptop can keep working perfectly, I have already checked the charging voltages and they are fine, no I know if any mosfet is not working well, how can I know?
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